CompIQ STELLA Pro Compressor Pedal for Bass & Guitar

279,00 329,00 

SKU: CIQ-5 / CIQ-5-D Categories: ,

You can order this product in the USA from Gear Hero HQ.

The CompIQ Stella Pro MK2 stands out as a remarkably powerful compressor/limiter pedal, offering a wide array of parameters for unprecedented control over playing dynamics. The Stella proves versatile for studio applications like bus compression and tracking and delivers outstanding results in live performances. It can be utilized with any instrument, such as guitar, bass, keyboards, synths, electro-acoustic guitars, etc., and even with vocals, with an additional microphone pre-amp.

The optional DITOS Transformer-Coupled Balanced Output DI is available as an add-on board. Built with Burr-Brown™ technology and highly advanced line drivers, the DITOS provides complementary signal conditioning and a warm musical voicing to any instrument.

Compressor Pedal Reviews - CompIQ StellaThe Becos Stella MK2 is a remarkably powerful compressor/limiter pedal. All of its functionality works well together and sounds fantastic. It is probably the only compressor you would ever need.

Guitar Pedal XCompared to my various previous compressors, I am more immediately aware of the precision and high fidelity of this device.

Gitarre und Bass Magazine - Test Review - June 2020 IssueIt’s amazing how many options Becos FX has put in these boxes. It is hard to find real alternatives with so much flexibility in one device.

Bass Player Magazine ReviewAn incredible amount of high-quality dynamic control. The answer to the prayers of any bassist wanting a studio-quality control on stage.

Sound On Sound - Review - July 2020 IssueThe Stella is, essentially, a studio VCA compressor in a pedal. It can sound wonderfully transparent, or full of character, and there’s oodles of control at your fingertips.

Bass Magazine JP ReviewEven if you apply a lot of compression, the amount of sound information does not decrease. There is no noise and the build quality is high.

Bass Gear Magazine - Review Demo - October 2024In use, the Stella with DITOS is a revelation, and I found it very enjoyable to dial-in sounds. For recording, it offers immense control over dynamics.

Vintage Guitar Magazine USA - VG Approved Gear Review - May 2020 IssueThe CompIQ Stella has a ridiculous amount of power. Better still, it’s a transparent compressor that only colors the tone as much as you allow it.

Guitar Magazine UK - Editor's Choice Review - September 2019 IssueNotes are thickened without thumping, and chords gel together in a way that makes you sound like a better player. This is a proper gem.

Music RadarThe quality of the sound is superb… But chief among the helpful features is the balanced DI output, which extends the usefulness of the Stella to above and beyond.

Premier GuitarThis incredibly full-featured comp offers all the controls a rackmount unit offers, but in a pedal format.

 Manual V2.0 | V1.4
 Manual DITOS
 Frequency response analysis
 Setting examples and sound demos
 Video Demo
 What people say
 CompIQ 101
 Compare compressors

Full Studio Compression Controls in Pedal Format

The CompIQ STELLA Pro MK2 is a feature-complete and powerful all-analog compressor/limiter pedal for use with guitar, bass, or any other instrument or audio source. It is also one of the very few that can be powered by an internal 9V battery or an external supply in the range of 9-18VDC. It is built around the high-performance 4320 THAT Analog Engine® which incorporates a true RMS-level detector that accurately measures the input signal and processes it through an ultra-transparent-sounding Blackmer® VCA. Unlike peak detection, commonly used in other compressors, the RMS (root mean square) sensor calculates an average peak level of the signal, aligning more closely with how human hearing perceives differences in loudness.

Guitar Pedal X

To my mind the Stella is the very best Pro Studio Style Pedal Compressor you can currently get – there really is nothing else at this level / form factor and degree of surgical precision – really nothing out there is more comprehensive and finely controllable than the CompIQ Stella!

The pedal now offers two selectable compression modes. In Feed Forward mode, emphasis is on speed and accuracy, utilizing a pre-VCA copy of the input signal. This mode can provide subtle compression up to brick-wall limiting based on control settings. The “old-school” Feed-Back compression delivers a smooth response suitable to transparently even out playing dynamics. This mode uses a post-VCA copy of the audio signal for its dynamic processing. While Feed-Back mode excels at low-to-medium compression ratios, it may be less suitable for using compression as an effect or hard peak-limiting. Nevertheless, by adjusting the threshold, employing a hard knee, selecting a higher ratio, setting a fast timing, and even boosting the control signal in the side chain filter, the Stella can function as a genuine Feed-Back limiter. In any settings, both modes sound clean and natural, without pumping, breathing, distortion or other artifacts.

Guitar Magazine UK - Editor's Choice Review - September 2019 Issue
The Stella – the brand’s flagship compressor for bass and guitar – is the perfect embodiment of the company’s spirit. Apart from your regular controls like ratio, threshold, attack, release and gain make-up, the Stella also has toggle switches for the side-chain filter, Tilt EQ, and knee. While there’s a lot going on with this pedal – it has nine knobs, seven LEDs, and four switches – it’s a lot more intuitive than it seems. WE SAID Small, but packs all the features of a VCA compressor, and the same audio quality too.

The Compression Knee feature provides two options, each with its particular sonic signature. Hard Knee compression is quick and snappy, suitable for peak limiting or enhancing the compression feel. Soft Knee compression is gradual and gentle, creating a transparent effect even at high ratios.

The Stella MK2 features upgraded side-chain capabilities, including a variable Lo-cut/boost filter specifically designed for bass instruments (±12dB @ 90Hz, 12dB/octave). When high-amplitude low frequencies trigger a lower set threshold, the compressor may engage prematurely, potentially over-compressing high-frequency elements, particularly in specific applications. By cutting lows in the side-chain, compression in the lows at the output is reduced, restoring overall signal energy. Conversely, boosting lows in the side-chain increases compressor sensitivity, aiding with very low-level signals. Moreover, a matching variable Hi-cut/boost filter in the side-chain further refines this balance (±7dB @ 3kHz, 12dB/octave). The cutting side of the filter avoids overly compressing highs, preserving a natural brightness in the output. Conversely, boosting highs in the side-chain enhances compressor sensitivity to high frequencies, which helps with very bright sounding instruments. When both filters are set to cutting, the compressor becomes more sensitive to mid-frequencies within 1-2 kHz, resulting in increased compression in this range at the output. These enhancements effectively manage compression across lows, mids, and highs, delivering impactful dynamics without unwanted pumping and maintaining desired balance in the audio spectrum.

The X-EQ tilting equalization circuit, rooted in the Hi-Fi era of the 1970s, offers two pivot frequency options: High (at 1kHz) suitable for guitars, and Low (at 330Hz) which works better for bass. This post-compression gentle correction can compensate for differences between instruments or be employed to enhance the lows or highs of the instrument. Both settings can be used in either application, each bringing a different but useful and likable EQ result.

The STELLA Pro MK2 also includes two internal DIP switches for voicing selection, allowing for subtle shifts in the internal dynamic frequency processing that add nuanced coloring to the sound. The Spark setting enhances the highs with polished brilliance, while Tight slightly dips the low-mids for added depth. Punch, on the other hand, delivers a tube-like compression feel with rich lows and warm highs, perfectly complementing the DITOS transformer voicing. While “punch” often suggests action, in this context it specifically relates to tonal sound perception. If you’re aiming for action-punch, we recommend using the Punch voicing along with Short auto timing or manual timing that features longer Attack and shortest Release settings. Additionally, Hard Knee and Feed-Forward side-chain configuration are ideal (Feed-Back will also work for punchiness with short timings). During manufacturing, we may set the Spark or Punch options as default so you can start experimenting immediately. However, if you prefer to maintain the most transparent sound response that preserves the instrument’s natural character, you can simply turn off the voicing switches.

Music Radar - Guitar and bass stompbox delivers dizzying array of features

The Stella is a compressor that could prove itself vital as part of any guitarist or bassist’s pedalboard, offering fully-featured, studio-quality control over your dynamics in compact form. There’s not much else Becos could have squeezed on here, though it is worth noting that there is a larger dual-band/stacked compressor in the range, the Twain, if you wanted more.

The Dynamic Auto Timing circuit offers user-friendly operation with two selectable options: Fast and Slower. These settings adapt to different playing styles. For added versatility, manual control over Attack and Release timings is available, unlocking a range of other compression possibilities. For instance, setting the compressor for slow attack and fast release allows initial transients to pass through at a higher audio level (set by the Make-up Gain), creating a tight and percussive sound suitable for guitar “chicken picking” or bass “slapping.”

Bass Gear Magazine

The Becos CompIQ Stella Pro MK2 with DITOS is not just another compressor pedal – it’s a professional tool that brings the finesse of high-end studio gear to your pedalboard. Its combination of pristine audio quality, deep control, and the added versatility of the DITOS makes it a must-consider for serious guitarists, bassists, and even recording engineers.

The Stella also features a Dry/Wet Mix, which allows for blending a desired amount of clean signal with the processed signal, resulting in a more natural compression effect. Such a mixing technique (a.k.a. New York style) is usually employed when hard compression is set out as an effect or when limiting must be made more subtle.

An 8-LED gain reduction meter allows for accurate monitoring of the compression applied to the input signal. This feature provides useful visual feedback on the degree of sound processing.

Premier Guitar - Becos CompIQ MINI Pro Compressors Quick Hit Review

This incredibly full-featured compressor offers all the controls a rackmount unit offers, but in a pedal format.

The optional DITOS board featuring a transformer-coupled balanced output in 1/4″ TRS format is available for insertion in the space typically used for the 9V battery. It enables direct recording or sending the signal to a mixing console and can also function as an unbalanced floating output to connect to another pedal or amplifier, delivering the warmth of the output transformer. The main VCA output remains functional for routing the signal to another processing chain or tuner. An internal ground-lift jumper is available to resolve potential ground-loop noise issues; we recommend keeping the jumper in place unless internal circuit ground lift is necessary. When the VCA output is in true bypass, DITOS still receives input from it, acting as a consecutive device. This always-connected active load results in a slight signal level difference between Stella’s powered and non-powered VCA output in true bypass. When not powered, DITOS can’t output any signal. Please note, the DITOS board is no longer sold separately and is now only available as an option for a new CompIQ Stella.

Compressor Pedal Reviews

I must say, wow! The transformer output is filled with natural warmth, with huge punchy lows and just all around brilliant tone. You definitely could just go instrument into Stella MK2 direct to console and find yourself really content with your tone. Everything about the Becos Stella oozes quality and fidelity. I’m not aware of any compressor on the market that packs this much punch in terms of functionality. I mean, this thing is really in a league of its own. Use it in the studio or on your pedal board. It really is quite amazing. From my perspective, for many use cases the Becos Stella MK2 is one of the best compressor pedals currently on the market.

CompIQ Stella MK2 Block Diagram

Note! The DITOS marking is present on all enclosures, even if the DITOS option isn’t purchased, to streamline production. If you’d like to add DITOS later, the pedal must be sent to us, with prepaid installation and return shipping costs. Contact us for details on adding DITOS to your Stella.

DITOS sound demos

Sound demos on bass 

Audio examples graciously provided by jazz artist Jean-François Untrau from France, showcasing the alternating effect of the compressor in bypass and active modes. For specific details on the utilized settings, please refer to the Settings Examples tab located above.


Pristine audio processing

The CompIQ series of compressors preserves the unique tonal characteristics of the input signal. They provide pristine audio compression and offer a high dynamic range, which enables clean, natural-sounding tones with minimal noise and no artifacts or distortions in any settings.

Key features

  • Full analog circuit with true by-pass
  • True RMS-level detector for accurate input signal measurement
  • High-performance Blackmer® VCA compression engine
  • Optional DITOS board for transformer-coupled balanced output (10KΩ impedance)
  • Feed Forward/Feed-back compression modes
  • Ratio 1:1 to infinite:1 (limiter)
  • Threshold -45dBu to +10dBu
  • Make-up Gain -6dB to +20dB
  • Soft/Hard compression knee selection
  • Manual timing: attack 0.12-12 ms/dB of gain reduction, release 1.2-120 ms/dB of gain reduction
  • Fast/Slower dynamic auto attack and release timing with hold for peaks over the threshold
  • X-EQ with selectable frequency pivot 330Hz for bass instrument or 1KHz for guitar or other applications
  • Voicing: Flat, Spark, Tight, Punch (internal DIP-switch selectable)
  • Lows/Highs variable side-chain filter with boost & cut around 90Hz and 3kHz
  • Dry/Wet mix
  • 8-LEDs gain reduction meter
  • High-end quality Burr-Brown FET audio ICs, low tolerance metal-film resistors, Panasonic, Kemet, Cornell Dubilier plastic film audio capacitors, Gold-plated multi-layers PCB, Gold-plated micro-switches
  • Genuine Hammond black-powdered aluminum enclosure
  • Runs on standard 9V internal battery or 9-18 V DC external power supply (not included), center negative, 12mm long barrel plug
  • 3-year warranty (direct to manufacturer, international, transferable)
  • Hand-assembled in Vienna, Austria

Note! Optimal configuration of the CompIQ Stella for studio recording or live performances typically necessitates a solid understanding of audio compression.

 

Reviews

For more reviews, mentions, and information, please visit our Blog.

Becos CompIQ Stella + Ditos reviewed by Bass Magazine Japan

Even if you apply a lot of compression, the amount of sound information does not decrease. It has a core body, so in that sense, it creates a high-quality impression. There is no noise and the build quality is high.

CompIQ Stella reviewed by Sound On Sound Magazine

We couldn’t be more honored than being featured in what is probably the most esteemed and pro-audio focused magazine in the United Kingdom and possibly in Europe. Thank you, SOS!

Becos CompIQ Stella + Ditos Reviewed by Bass Player Magazine

All in, the Stella manages to cram a dizzying number of top-quality features into a standard pedal. At all times, the tone was clear, clean, and detailed in the way that I’ve come to expect from high-end studio plugins. Bravo!

CompIQ STELLA Pro Compressor reviewed by Guitar Magazine

Guitar Magazine UK – the world’s leading authority and resource for all things guitar, takes a spin on the CompIQ STELLA Pro Compressor in a thorough review in the September 2019 print issue. A short version of the review is available to read online.

CompIQ STELLA Pro Compressor reviewed on Basschat Forum

Every once in a while,  a very pro user finds the time to write a complete review on a product of hours. This time, the  Dark Wizard of the Knights Martial user on Basschat.co.uk forum took the task to make an in-depth review of the CompIQ STELLA Pro Compressor pedal.

Box Weight 0,33 kg
Box Dimensions 13 × 8 × 5,5 cm
Technical Specifications

Input impedance: 1.1MΩ
Main unbalanced output impedance: <100Ω
Optional DITOS transformer-coupled balanced output impedance: 10KΩ
Feed Forward/Feed-back compression modes
Ratio: 1:1 to inf:1
Threshold: -40dBu to +10dBu
Make-up gain: -6dB to +20dB
0dB Referrence Input Level: -20dBu (77.5mV)
Total amount of compression: usually 20dB for -20dBu (77.5mV) input level; 36dB for +4dBu (1.23Vrms) input level, all at inf:1 Ratio
Dynamic Auto Attack time: ~7ms in Fast setting; ~15ms in Slower setting
Dynamic Auto Release time: ~70ms in Fast setting; ~220ms in Slower setting
Dynamic Timing: transients are handled faster; steady signals are handled slower
Manual Attack range: 0.12 to 12ms/dB
Manual Release range: 1.2 to 120ms/dB
Side-Chain Filters: Lows (High-Pass, variable, +/- 12dB @ 90Hz, 12dB per octave), Highs (Low-Pass, variable, +/- 7dB @ 3 kHz, 12dB per octave)
X-EQ: Low (pivot at 330 Hz, +/-6dB), High (pivot at 1 kHz, +/-6dB)
Voicing: Flat (DIP-switches OFF), Spark (DIP-1 ON, DIP-2 OFF), Tight (DIP-1 OFF, DIP-2 ON), Punch (DIP-switches ON)
THD VCA: 0.1% 1kHz, 0dBu in/out, FB mode, 4:1 ratio, -20dBu threshold, +12dB gain, 1KΩ load, 24KHz BW, 12VDC power, through 6th harmonic
THD DITOS: 0.18% 1kHz, 0dBu in/out, FB mode, 4:1 ratio, -20dBu threshold, +12dB gain, 1KΩ load, 24KHz BW, 12VDC power, through 6th harmonic
Max Input Level: +10dBu
Max Output Level: +12dBu
Frequency response for VCA and DITOS outputs: -2dB @ 40Hz; 0dB in between 100Hz and 24KHz
8-LEDs Gain Reduction Display: calibrated for -20dBu reference input level
Internal battery operation: 9V (6F22) alkaline battery recommended
Voltage Range: 9-18VDC, center negative [ – ], power supply not included
DC Power Plug Barrel: Ø 5.1/2.1mm, 12mm long
Current consumption without DITOS board: < 35mAh @ 9VDC; < 44mAh @ 12VDC; < 63mAh @ 18VDC
Current consumption with DITOS board: < 43mAh @ 9VDC; < 52mAh @ 12VDC; < 72mAh @ 18VDC
Simulate on pedalboard: Pedaltrain's https://pedalboardplanner.com

Build Option

Without DITOS Trafo Output, With DITOS Trafo Output Installed

Note! The product name, design, circuit, components, description, pictures, technical specifications, functionality, etc. may change anytime and without prior notice (Terms and Conditions). We advise you to check the manual (only available as a downloadable PDF above in this page) for details on the product's current features and functionality. If you spot errors, inconsistencies, or if you need more information or assistance, please contact us.

The measurements were taken using FRA4PicoScope 64-bit software with a PicoScope 2204A oscilloscope and its synchronized signal generator, a -20dBu (0.22Vp-p) input signal positioned at average instrument-level dynamics, and a 9VDC power supply. The CompIQ Stella Pro Compressor MK2 controls were set to balance input and output levels across the Dry and Wet lines. The output was connected to a high-impedance load during measurement.

The Stella Pro offers extensive control over frequency dynamics. The tilting EQ and Voicing settings shift specific frequencies, adding controlled coloration to the signal. By adjusting the side-chain frequency filters (cut or boost), users can intentionally alter the compression of affected frequencies at the output. While we don’t provide frequency response plots for every possible configuration, the Stella offers a wide range of adjustments. Each setting creates a unique response, making it adaptable to individual instruments and user preferences. The measurements use a 4:1 Ratio, threshold set for the indicated compression in dB, Hard Knee, Slower Auto Timing, and highlight Feed-Forward (FF) and Feed-Back (FB) side-chain topologies. Note that the input signal is not shown, as it would appear as a straight line at 0dB, similar to the bypassed signal in both powered and non-powered states.

 

Frequency response without compression and in true bypass

Below are the frequency response plots for the compressor output, covering both Wet and Dry lines with no compression applied. The bypassed signal is also shown for both powered and non-powered pedal states.

VCA output, 100% Wet line


VCA output, 100% Dry line

VCA output, True By-Pass (powered)

VCA output, True By-Pass (not powered)

 

Tilting X-EQ with two frequency pivot options

When the X-EQ knob is turned clockwise (CW), Highs are boosted and Lows are attenuated. Turning it counterclockwise (CCW) boosts the Lows and attenuates the Highs. Two tilting frequency point options are available: 330Hz for bass and 1kHz for guitar. With X-EQ knob at noon, there are no frequency changes. Small variations in the tilting point may result from Make-Up Gain settings and component tolerances (we use 1% tolerance thin-film resistors and 5% tolerance plastic film capacitors).

VCA output, 100% Wet, no compression, 330Hz Pivot (L), max tilting toward Lows

Lows are boosted while Highs are attenuated, 330Hz frequency pivot

VCA output, 100% Wet, no compression, 330Hz Pivot (L), max tilting toward Highs

Highs are boosted while Lows are attenuated, 330Hz frequency pivot

VCA output, 100% Wet, no compression, 1kHz Pivot (H), max tilting toward Lows

Lows are boosted while Highs are attenuated, 1kHz frequency pivot

VCA output, 100% Wet, no compression, 1kHz Pivot (H), max tilting toward Highs

Highs are boosted while Lows are attenuated, 1kHz frequency pivot

 

The “Normal” Side-Chain

The two plots below show the compressor’s output frequency response during compression with the Lows and Highs SCF knobs at noon in “Normal” mode. The side-chain signal mirrors the input without extra filtering. With output level matching the input, the CompIQ Mini maintains a nearly perfect flat frequency response from 30Hz to 30kHz, even under this high compression.

The slight subsonic adjustment at the start reflects the RMS sensor responding to the automatic low frequency sweep. The starting level is set by the Make-Up Gain for the chosen compression amount. Once compression settles in, the circuit’s frequency response at the output is linear. The plots show responses for both Feed-Forward and Feedback compression types.

VCA output, 4:1 Ratio, 12dB of Compression, 100% Wet, Feed Forward, with normal SCF

VCA output, 4:1 Ratio, 12dB of Compression, 100% Wet, Feed-Back, with normal SCF

 

 

Cutting and boosting Side-Chain Filters frequency

Cutting and boosting the Side-Chain Filters frequency allows users to manipulate the balance of specific frequencies within the side-chain, influencing how the compressor responds to those frequencies at the output.

When the Lows and Highs SCF knobs are turned fully clockwise (CW), the side-chain progressively attenuates lows and highs using first-order variable High-Pass Filters. This reduces the compressor’s sensitivity to these frequencies, resulting in less compression and making them louder at the output via Make-Up Gain, as shown in the plots. Turning the SCF knobs counterclockwise (CCW) boosts these frequencies in the side-chain, increasing compression and reducing their levels at the output. With the SCF knobs at noon, the filters leave the signal unchanged, which we refer to as “Normal” side-chain processing.

Although there are slight differences between Feed-Forward and Feed-Back compression modes, only Feed-Forward plots are shown here. Additionally, the side-chain plot is overlapped (in Green), illustrating how the output frequency response (in Blue) mirrors the filtering in the side-chain.

VCA output, 4:1 Ratio, 10dB of Compression, Feed Forward, with max cut on Lows SCF

VCA output, 4:1 Ratio, 20dB of Compression, Feed Forward, with max boost on Lows SCF

VCA output, 4:1 Ratio, 8dB of Compression, Feed Forward, with max cut on Highs SCF

VCA output, 4:1 Ratio, 16dB of Compression, Feed Forward, with max boost on Highs SCF

VCA output, 4:1 Ratio, Feed Forward, with max cut on Lows & Highs SCF’s

More compression is applied to the Mids.

 

VCA output, 4:1 Ratio, Feed Forward, with max boost on Lows & Highs SCF’s

More compression is applied to the Lows and Highs than to the Mids.

SCF measurements were taken after balancing input and output levels with the SCF in the neutral position for the initial measurement. The filters were then adjusted to their extremes (fully CW and CCW) to demonstrate their effects. In practical use, Make-Up Gain and other parameter adjustments are necessary to maintain a balanced input-output level, factoring in the SCF setup. Filtering combinations, including the tilting EQ and Voicing, create even more distinct compression tone-prints.

The CompIQ series of compressors
|<<     <<     SWIPE TABLE     >>     >>|
Circuit Design
Dynamic Processing
Analog Engines®
Control Element
Side-Chain Topology
Side-Chain Detection
Side-Chain Filter
Side-Chain Frequency Compensation
Voicing
Adjustable Input Level
Peak-level Indicator
Balanced Output
Crossover
Compression Ratio
Threshold
Dynamic Auto Timing
Attack Time
Release Time
Make-up Gain
Compression Knee
EQ
EQ Bypass
Dry/Wet Mix
Saturation
Saturation Filters
Compression Display
9V Battery Operation
DC Power Range
Current Consumption
More Info
Compressor / Limiter
Dual Band / Stacking
2
Blackmer® VCA
Feed Forward / Feed-Back
True RMS-Level Sensor
Variable Lows / Highs
YES
-
±12dB
-2dBu input, +2dBu output
Transformer Balanced / Unbalanced (Floating) with optional DITOS output
Linkwitz–Riley
70Hz to 1KHz
1:1 to inf:1
both bands
-40dBu to +10dBu
both bands
Auto Fast / Slower
F: 5‐7ms / S: 10-15ms
F: 70ms / S: 100‐220ms
-6dB to +20dB
both bands
Hard / Soft
both bands
Unbalance Make-up Gains around X-over frequency pivot
-
YES
MK1
-
6-LED
both bands
-
9-18VDC center negative
Ø 5.1/2.1mm, 12mm long
< 95mAh @ 9VDC
< 170mAh @ 18VDC
Compressor / Limiter
Single Channel
1
Blackmer® VCA
Feed Forward / Feed-Back
True RMS-Level Sensor
Variable Lows / Highs
YES
Flat, Spark, Tight, Punch
-
-
Transformer Balanced / Unbalanced (Floating)
with optional DITOS DI board
-
1:1 to inf:1
-45dBu to +10dBu
Auto Fast / Slower
F: 5‐7ms / S: 10-15ms
Manual: 0.12 to 12 ms/dB
F / S: 70ms / 100‐220ms
Manual: 1.2 to 120 ms/dB
-6dB to +20dB
Hard / Soft
tilting X-EQ ±6dB
around 1kHz / 330Hz frequency pivots
MK1
YES
MK1
MK1
8-LED
YES
9-18VDC center negative
Ø 5.1/2.1mm, 12mm long
< 35mAh @ 9VDC
< 63mAh @ 18VDC
Compressor / Limiter
Single Channel
1
Blackmer® VCA
Feed Forward / Feed-Back
True RMS-Level Sensor
Variable Lows
YES
-
-
-
-
-
1:1 to inf:1
-40dbu to +10dBu
Auto Fast / Slower
F: 5‐7ms / S: 10-15ms
F: 70ms / S: 100‐220ms
-6dB to +20dB
Hard / Soft
-
-
YES
-
-
5-LED
-
9-12VDC center negative
Ø 5.1/2.1mm, 12mm long
< 25mAh @ 9VDC
< 38mAh @ 12VDC
Compressor
Single Channel
1
Blackmer® VCA
Feed Forward
True RMS-Level Sensor
Normal
YES
-
-
-
-
-
1:1 to inf:1
Lo: -40dBu / Hi: -30dBu
Auto Slow
12ms
220ms
-6dB to +20dB
Hard
-
-
YES
-
-
5-LED
-
9-12VDC center negative
Ø 5.1/2.1mm, 12mm long
< 15mAh @ 9VDC
< 23mAh @ 12VDC
MINI Pro vs. other minions

Do you want to know more about mini compressor pedals? We compiled a Technical Shootout for the most performance and popular mini compressor pedals available. Find out how our CompIQ MINIs stand out.

Blackmer® VCA

The dbx 202 “Black Can” Voltage Controlled Amplifiers (VCAs), designed by David Blackmer, founder of dbx Inc., were the first professional-grade VCAs and are still used in audio consoles today. Built with a gain cell of eight transistors, they were groundbreaking for their time. However, advancements in integrated circuit technology have since led to better performance.

For example, the CompIQ series of compressors uses THAT Corporation’s Blackmer® VCAs, known for their unique exponential control, where gain changes directly in decibels. These VCAs offer a wide dynamic range, low distortion, and maintain a neutral tonal character, ensuring transparent audio processing without coloration. This makes them ideal for professionals seeking high-quality, transparent signal handling.

RMS-Level Sensor

David Blackmer, the founder of dbx Inc., is known for inventing the RMS-level detector. It calculates the Root Mean Square level of input signals in a way that mimics how our ears perceive sound, which is in a logarithmic format.

This detector’s exact envelope is then used to control the Voltage Controlled Amplifier (VCA) based on user-defined settings like Ratio, Knee, SCF, Threshold, Attack, Release, and Gain.

Threshold Range

The CompIQ compressors have a versatile Threshold control that can handle a wide range of input signals, from weak to pro-audio levels, preventing distortion from high-level spikes. The threshold range scale is logarithmic and spans from approximately -40dBu to +10dBu, suitable for various applications. Typically, the optimal threshold for pickup signals falls between -30dBu to -20dBu, with brief spikes that can reach higer, up to line level at +4dBu.

For desired peak compression, set the Threshold knob at around 9 o’clock or slightly higher. Higher compression ratios are unnecessary unless you’re aiming for limiting. If you want more noticeable compression, lower the threshold, but use smaller ratios to avoid excessive signal compression, unless you intend to achieve a specific effect, like the “New York compression style,” which blends compressed and unprocessed signals for a balanced dynamic range.

Side-Chain Filter

The Side-Chain Filter (SCF) is a feature that affects compression based on frequency. It prevents high-amplitude low-frequency content from triggering compression. This is achieved by filtering the side-chain downwards from 1kHz, as shown in the graph. By doing this, compression doesn’t affect those specific low frequencies that much at the output of compressor. As a result, the low frequencies come out louder, less compressed, creating a distinct and fuller sound.

Side Chain HPF Options in CompIQ PRO Stella Compressor (-12dB at 90Hz & -12dB at 200Hz)

The Side-Chain Filter also helps reduce unwanted pumping, a common issue with “high ratio / low threshold” compression settings. The SCF approach differs from methods like threshold or ratio adjustments, soft-knee compression, or blending dry and wet signals. When combined with these controls, the SCF offers more flexibility for handling high amplitude audio content.

After 2022, the SCF circuitry in compressors like the MK2 Mini, Stella, and Twain was upgraded. The Mini’s SCF now variably adjusts low frequencies, while the Stella and Twain models handle both low and high frequencies. In these compressors, rotating the SCF control counterclockwise (CCW) boosts, clockwise (CW) cuts, and the center position leaves frequencies unchanged in the side-chain. This variable control adds more versatility than usual cut-only filters.

The Stella and Twain MK2 models include a Highs Side-Chain Filter for frequencies above 3kHz with cut and boost. This feature helps control overly bright signals by fine-tuning compressor sensitivity to selectively target high frequencies.

For a detailed technical article on side-chain filtering, including frequency response plots, see the following post:

Side-Chain Frequency Compensation

In our designs, “frequency compensation” refers to a pre-conditioning of the signal in the side-shain detector. In music, dominant frequencies and harmonics are present in each note. When notes have lower dominant frequencies, like in low guitar strings or bass, they can trigger compression too soon, over-compressing harmonics and higher notes. To tackle this, we use gradual pre-filtering starting at 20KHz and moving downwards with additional high-pass filter at 2KHz. This progressive approach results in a more natural, dynamic processing, especially noticeable in percussive or bass-rich instruments. Our compressors use a standard side-chain roll-off curve that aligns with human hearing, reducing -12dB at 2KHz compared to 20KHz.Side Chain HPF Options in CompIQ PRO Stella Compressor (-12dB at 90Hz & -12dB at 200Hz)

Side Chain Feed Forward / Feed-Back

The CompIQ Mini, Stella, and Twain models produced after 2022, 2024, and ongoing, offer selectable side chain processing. In Feed-Forward mode, the control signal is pre-VCA, resulting in an fast “in your face” compression feel. The new Feed-Back mode, however, uses the control signal post-VCA for a softer processing feel due to inherently longer attack and release times and the particularity of this way of controlling the side chain. In Feed-Back mode, an adjustable gain control within the VCA reduces overall noise from Make-Up Gain. This way of processing is different from the classical feed-back circuits which usually employ a fixed high gain placed after the gain reduction element.

Though Feed-Back mode limits compression ratio due to finite gain control, our compressors can combine Hard Knee with Fast Auto or Manual Timing (in Stella) for enhanced compression speed and amount. With a higher variable Threshold targeting high-amplitude frequencies, our compressors can effectively function as soft limiters, leaving the core sound intact. Notably, the RMS level sensor also adds to the natural feel of dynamic processing of our compressors.

For a detailed technical article on side-chain filtering, including frequency response plots for both Feed Forward and Feed-Back compression modes, see the following post:

Crossover

The CompIQ Twain features a variable-range Linkwitz-Riley crossover (70Hz to 1KHz), which splits the input signal into two separate frequency bands processed by dual compression engines. The crossover output also feeds the Dry Line, allowing seamless blending of Dry and Wet signals without phase cancellations, no matter where the crossover is set.

To illustrate, a chart shows matched levels of internal and external circuits with the crossover at 1KHz, output set to buffer level, and Mix at 100% Wet. The chart demonstrates nearly perfect alignment of phase across the audio spectrum.

Twain Crossover Phase Shift Plot

The input signal’s phase remains a straight line, but the output signal’s phase gradually shifts from 0° at the lows to 400° at the highs. This is a normal result of the signal separation and recombination by the crossover’s band filters and compression engines.

The following drawing illustrates the Crossover Knob Frequency Scale for Twain MK1 and the most suitable setting for utilizing the Saturation feature.

CompIQ Twain Crossover Frequencies & Best Saturation Range

CompIQ Twain Crossover Frequencies & Best Saturation Range

For a detailed technical article on Twain MK2 frequency response, see the following post:

Tape Saturation Lo & Hi-Cut filters

Both the CompIQ Stella and CompIQ Twain MK1 compressors offer an analog Tape Saturation circuit that exclusively affects the Dry signal. This lets you add optional saturation to your signal, which can then be blended with the compressed Wet signal to introduce harmonic distortion and warm up the audio while preserving the compressed signal’s dynamics. Note that you might need to dial in some saturation before it becomes audible due to the high headroom of the saturation circuit.

For the CompIQ Stella, you can activate the LPF and HPF by removing the internal jumpers. The CompIQ Twain has variable filters accessible through small trim knobs. The HPF is for the Lows band, and the LPF is for the High band. In both compressors, the HPF is placed before the Saturation engine, while the LPF is positioned after it.

These filters are recommended for use in conjunction with the Tape Saturation feature, as they may affect the clean, dry signal otherwise. The filters were introduced to provide flexibility when processing different audio sources while maintaining musicality and avoiding undesirable artifacts like muddiness in the low end (especially with bass) or harshness with bright guitar pickups.

X-EQ

The X-EQ section comes after the compressor and before the Mix control, affecting only the wet signal. When mixing dry and processed signals, the X-EQ effect gradually diminishes.

In the Stella, the X-EQ has two frequency pivot points for bass (at 330Hz) or guitar (at 1KHz). At extreme knob settings (fully clockwise or counterclockwise), there’s a total 12dB difference between low and high frequencies. When the X-EQ knob is in the central position, no frequency alterations occur. You can bypass the X-EQ section by adjusting a jumper within the pedal (only available for Stella up to V1.3; for V1.4 the jumper is not physically installed but it can be installed by the user if desired, and starting with V2.0 the jumper is no longer available).

Line-level signals

The CompIQ compressor series can handle input signals ranging from +5dBu to +10dBu without distortion, depending on the model and power voltage. They offer a wide 50dB threshold range from -40dBu to +10dBu, making them suitable for magnetic pickups, line-level signals, line-level FX Loops, and high impedance or line-level inputs on recording interfaces. These compressors provide precise compression thanks to the RMS-level detector, and their LED indication is accurate when the input signal is around the calibrated reference level. The CompIQ series internally sets a “0dB reference input level” at -20dBu (77.5mVrms). The amount of compression (inf:1 Ratio) depends on the input signal level and is typically 20dB for input signals around -20dBu (77.5mVrms) and 36dB for +4dBu (1.23Vrms) input signal levels.

Stella MK2 Voicing

Stella MK2 voicing adds subtle shifts in the internal dynamic frequency processing that add nuanced coloring to the sound. This is not really an “EQ”. The Spark setting enhances the highs with polished brilliance, while Tight slightly dips the low-mids for added depth. Punch, on the other hand, delivers a tube-like compression feel with rich lows and warm highs, perfectly complementing the DITOS transformer voicing. While “punch” often suggests action, in this context it specifically relates to tonal sound perception. If you’re aiming for action-punch, we recommend using the Punch voicing along with Short (S) auto timing or manual (M) timing set with longer Attack and shortest Release settings. Additionally, Hard Knee and Feed-Forward side-chain configuration are ideal (Feed-Back will also work for punchiness, with short timings). During manufacturing, we may set the Spark or Punch options as default so you can start experimenting immediately. However, if you prefer to maintain the most transparent sound response that preserves the instrument’s natural character, you can simply turn off the voicing switches.

Make-up Gain

All our compressors are designed to provide up to +20dB of gain to compensate for volume loss during compression. They also handle signals up to +10dBu (that’s 6.9Vp-p of headroom when powered at 9V)—double the amount of pro line level at +4dBu—with a max of 0.5% Total Harmonic Distortion. A passive instrument pickup can peak at 2Vp-p, but only briefly, when the string is plucked hard. Most of the time, it sits just above an average of -20dBu (around 0.3Vp-p), which is why instrument levels are calibrated to that range.

But let’s say your signal source consistently peaks at +4dBu (3.47Vp-p) and you apply compression. How much gain can you add before hearing clipping in our compressors? Quite a lot—up to +20dB (with the gain knob maxed out)—relative to what’s compressed, aiming to bring the average signal back to input level. However, if the signal is below the threshold, maxing the gain will also reveal more noise.

Now, if you want to boost this strong signal further, how much gain can be applied before clipping? Up to about +6dB you’re still within 0.5% THD (which is inaudible), but if you keep adding gain, you’ll start hearing distortion around 10% THD, as you approach the circuit’s headroom limit. You’ll get slightly more headroom if you power the compressors at 12-18V, but headroom doesn’t increase proportionally with voltage.

For reference, if you boost a +4dBu signal by +20dB, the peak-to-peak voltage becomes 34.7Vp-p. Can that pass cleanly through something powered at even 24VDC? No.

What can we learn from this? First, there’s always a limit to how much you can push a signal in any system, so check the tech specs to know that limit. Second, if you feed a steady, strong signal into the CompIQ compressor circuits, you won’t be able to max the gain knob without hitting distortion at some point—it’s not designed to boost just any signal all the way up. Third, the Make-up Gain control in our circuits (and most compressors) is for recovery gain, not as a general boost. Finally, ask yourself: why would you need that much gain/boost in a compressor?

Compressor noise

Compressors can introduce noise due to the amplification of make-up gain. As compression increases, more make-up gain is needed, adding noise to the signal. This noise can be further amplified by subsequent pedals or amplifiers in the signal chain. Additionally, any device before the compressor may introduce noise, which gets amplified by the make-up gain circuit.

It’s important to understand that if a compression setting requires a significant amount of make-up gain, noise will become more noticeable during silent parts. The signal-to-noise ratio drops during pauses, where noise may surpass the signal, leading to a negative SNR. Expecting complete silence when applying a +20dB gain is unrealistic. However, compressing at -20dB and then restoring with +20dB results in minimal but still noticeable amplification noise, especially during pauses. If maximum make-up gain is needed, it’s best to use the compressor for peak limiting rather than compressing the entire signal.

To accurately compare compressors for noise, they should be set with the same threshold, ratio, and make-up gain, fed the same reference signal. Some compressors have lower ratio limits, like 3:1 or 7:1, which makes them “quieter” because they require less re-amplification. Note that the term “quiet” is subjective and can be misleading.

For the CompIQ Twain, improper configuration in Stacked Mode can generate extra noise due to multiple amplification stages. The input preamp can boost the signal by up to 12dB, and each of the stacked compressor engines can add up to 20dB, resulting in a total boost of 32dB in dual-band mode or up to 52dB in stacking mode. This amplification can easily introduce noise or distortion, especially with strong input signals.

Given the pedal’s complexity, visual indicators for signal levels are included. The Twain MK2’s peak-level indicator shows Green at -2dBu, reflecting input strength after adjustments like preamp boost or external input settings. It turns Red when the output reaches +2dBu, which can happen when preamp trim and make-up gain combine. A balanced signal, typically around +4dBu, will flash between Green and Red. If both thresholds are hit at once, the indicator turns Orange. Steady Orange or Red signals suggest adjustments are needed for optimal processing.

The Twain Settings Examples offer tips for reducing amplification noise in stacked mode. Focus on adjusting compression and make-up gain more in the second (highs) engine than in the first (lows) engine. You can also control which frequencies are compressed in the second engine by increasing the lows threshold, using the Low or Deep side-chain filter, and applying a soft knee to lessen noise or the compression effect. Balancing these controls across both engines helps achieve the best settings for your needs. As a general guideline, aim to light up only the first three Green LEDs on each engine, with the fourth barely clipping occasionally.

Dual-band processing is more complex and requires specialized compression. What works for full-band compression doesn’t directly apply to dual-band compression. The dual-band compressor’s always-on crossover has passive components that inherently generate thermal noise, which is also amplified by make-up gain.

A practical approach is to understand how compression controls (threshold, ratio, knee, timing, blend, side-chain filter, and gain) affect compression and your desired outcome. Adjust these parameters to minimize the need for high make-up gain.

Noise generated by make-up gain is typically lower with higher input signal levels because the signal is larger. When using a limiting setup with a higher threshold, hard knee, and inf:1 ratio that affects only the signal peaks, any noise is usually inaudible.

For weak magnetic pickup signals, using a 4:1 ratio and a low threshold on the CompIQ can provide compression with noise levels similar to studio-grade equipment. You can further reduce noise by blending in dry signal with the MIX control and using a soft knee to minimize the need for make-up gain.

Power sources can introduce noise to electronics. Switching power supplies, in particular, are known for introducing hissing sounds. To minimize this, use well-filtered and regulated power sources. Most pedals aren’t designed for extensive power conditioning and filtering, so it’s essential to use quality power sources separately.

Power supply noise

All our pedals operate on 9-18VDC, with current requirements provided in each product’s specifications. The cleanest DC power comes from batteries connected directly to the circuit. While only some pedals support internal 9V batteries, all can be powered with external supplies that deliver the required voltage and current.

Not all power supplies are built equally though. Most pedalboard or stand alone power supplies use switching designs that convert and regulate DC through high-frequency PWM, which can introduce noise that affects analog audio devices more than digital ones. High-quality power supplies however, like those from Voodoo Lab, Strymon, and Cioks, use isolated ports, multi-stage regulation, and  effective filtering and protections to prevent noise propagating in your audio signal chain. These are more expensive but worth the investment. It doesn’t make sense to invest in high-quality audio gear only to power it with cheap, poorly made supplies.

If you hear high-pitched noise (like a squeal or screech) or constant hiss above the normal noise floor with our or any pedals, it’s likely due to poor regulation and filtering from your power supply, an overload from exceeding its current capacity, or both. To check if your power supply is the problem, try powering the pedals with an external 9V battery temporarily. If the noise goes away, it confirms that your power supply isn’t up to standard.

We recommend using professional-grade power supplies and keeping usage within 70-80% of their current rating. For example, if a pedal requires 9VDC and 70mAh, power it from an isolated port that supplies 100mAh.

Avoid daisy-chaining power when possible to prevent ground loop noise.

Switching noise
It is possible for pops or static noise to manifest when adjusting certain settings while the pedal is engaged. These settings include the knee, timing, side chain filter, EQ pivot, dual-band/stacked mode, and power on/off.

Gain Reduction Meter

The CompIQ line of compressors features a gain reduction meter to show the amount of compression applied to the input signal in dB. However, the number of LEDs in the meter varies between products and may lead to “invisible” compression between LEDs. To achieve optimal metering, a minimum of 20 LEDs is recommended.

Each product’s metering is designed and calibrated with reference to comparators at 9-12VDC, ensuring an accurate indication of gain reduction. However, the CompIQ Twain can also operate at 18VDC. At 18VDC, some calibrated thresholds for metering may shift, resulting in a metering indication of approximately -3dB less. While running an electronic circuit within a fixed voltage range (plus or minus some tolerance) is proper, operating at 80-100% voltage upshifts may alter certain calibrations within the circuit blocks. While this might have audible advantages, it impacts metering precision and introduces variation.

In rare cases, such as when powering the pedal at a higher voltage and switching the knee, the meter LEDs may appear “locked” and remain lit. This happens due to an electric spike caused by knee switching, briefly activating the LEDs even without an input signal. To prevent this, it’s advisable to switch the knee when no input signal is present but with the input and output plugs inserted into the pedal.

To turn off the remaining lit LEDs, the pedal must be powered off and then on again, or you can play a signal louder than the remaining lit LEDs, resetting the comparators. Alternatively, you can power the pedal with 9-12VDC instead of 18VDC.

Powering voltage range for the CompIQ line of compressors

The CompIQ pedal line can function within a power range of 9-18VDC. However, for optimal performance and circuit protection, certain components like the gain reduction meter are designed and calibrated conservatively to operate within the 9-12VDC range. It’s important to use high-quality, regulated power sources because exceeding the 18VDC maximum can potentially damage active components.

To prevent voltage spikes during pedal connection, it’s advisable to connect the pedals before powering on the power supply. Additionally, it’s a good practice to power your entire pedalboard simultaneously by switching on the AC switch on the power supply or plugging it into the AC wall wart. This helps control current draw and maintain stable voltages at each power output.

While our pedals incorporate reverse polarity protection, there are limits to what these safeguards can handle. Thus, using power supplies within the recommended voltage range is important to ensure optimal performance and protect the circuits’ long-term durability.

Demos, reviews & comments

Blog post: The 101 of the CompIQ line of compressors

CompIQ Stella Settings Examples

Before you start

The CompIQ Stella is a full-featured compressor in pedal format which allows complex processing while preserving the dynamics of your playing. A good understanding of compression is normally required to optimally set it up for live performance or studio recording.

We advise testing the CompIQ Stella with an instrument amplifier instead of using headphones. Start by playing with it alone then integrate your settings along with your other pedals.

Here is the Stella Manual for your reference. For more in-depth technical info on our VCA line of compressors please take a look at the CompIQ 101 section. If you have particular questions regarding how Stella works, or you would like to share your feedback please contact us.

Stella sound demos on bass

Each demo has an associated image with pedal’s knobs & switches position used when recorded. A higher resolution image is displayed when loading the track on Soundcloud — along with details regarding the instrument, strings used for that phrase, and playing technique. Start by playing any track in the playlist below and click View Track to load it on Soundcloud for details.

The audio phrase is played twice in each track. First, the dry sound with the pedal in bypass, followed by a take with pedal engaged.

Many thanks to jazz artist Jean-François Untrau (France) who recorded these demonstrations.

Stella + DITOS sound demos on guitar

Back to Product Page

Blog post: CompIQ Stella Settings Examples

IN THE PRESS

For more articles, reviews, and mentions, please check our Blog.

Becos CompIQ Stella + Ditos Reviewed by Bass Magazine Japan - May 2022Usually, when I use a compression pedal, it’s more like an effect because it sounds cooler playing slap, rather than the use it to even out peaks. But the Stella can be set radically: you can hit only the high peaks with some nuances, or you can make it sound tight.

Becos CompIQ Stella + Ditos Reviewed by Bass Player Magazine - June 2022All in, the Stella manages to cram a dizzying number of top-quality features into a standard pedal. At all times, the tone was clear, clean and detailed in the way that I've come to expect from high-end studio plugins. Bravo!

Sound On Sound Magazine UK - Review - July 2020 IssueIn short, it’s what I’ve always wanted of a compressor pedal. The Stella can sound wonderfully transparent, or full of character, and there’s oodles of control at your fingertips. Bass players should absolutely love this thing (though I suspect they may be even more enamored with the company’s new split-band compressor).

Guitar Pedal XEverything here exudes quality and fidelity. 'Pristine' is typically mostly used to describe particularly high quality Reverb algorithms, but it also very much applies here. And you can deploy this pedal very simply if you wish to - and mostly just using the 3 core Ratio, Threshold and Gain controls. You can leave pretty much everything else in the centre, set Fast or Slow Auto Timing, Hard/Soft Knee, and F or B Side Chain Feed - the pedal takes next to no time to set up in the most basic of fashions.

Vintage Guitar Magazine USA - VG Approved Gear Review - May 2020 IssueThe CompIQ Stella has a ridiculous amount of power for a small stompbox. Better still, it's a transparent compression that only colors the tone as much as you allow it, unlike many lower-end boxes that simply squash tone and volume. That's the sign of a good unit - delivering compression power, clarity, and flexibility to control exactly what you want to hear from a guitar.

Guitar.com - Becos Effects’ CompIQ Pro Stella Compressor features rack-style controls on a stomperThis pedal is designed to provide an array of features – with rack unit-levels of tweakability – in a pedalboard-friendly format. A highlight of the CompIQ Pro Stella Compressor is its analog tape saturation circuit.

Music Radar - Guitar and bass stompbox delivers dizzying array of featuresFor those who take their dynamics seriously, this fully featured stompbox offers a studio-grade VCA compressor that you can mount on your pedalboard. The Stella is a compressor that could prove itself vital as part of any guitarist or bassist's pedalboard, offering fully-featured, studio-quality control over your dynamics in compact form.

Extensive review of CompIQ PRO Stella Compressor on TalkBass.com ForumThis is a highly versatile and pedal board friendly compressor. I'm not aware of anything on the market that packs this much punch in terms of functionality. In many ways, it has raised the bar for compressor pedals. The words "Pro Compressor" on the face of the compressor is appropriate. There is a whole lot of versatility in an amazingly small package.

Guitar World - Knob-heavy pedal offers compression, limiting, tape saturation and more.Knob-heavy pedal offers compression, limiting, tape saturation and more.



COMPARE COMPRESSORS

The comparison table is best viewed on large screens, in landscape mode, preferably on desktop.

Circuit Design
Dynamic Processing
Analog Engines®
Control Element
Side-Chain Topology
Side-Chain Detection
Side-Chain Filter
Side-Chain Frequency Compensation
Voicing
Adjustable Input Level
Peak-level Indicator
Balanced Output
Crossover
Compression Ratio
Threshold
Dynamic Auto Timing
Attack Time
Release Time
Make-up Gain
Compression Knee
EQ
EQ Bypass
Dry/Wet Mix
Saturation
Saturation Filters
Compression Display
9V Battery Operation
DC Power Range
Current Consumption
More Info
Compressor / Limiter
Dual Band / Stacking
2
Blackmer® VCA
Feed Forward / Feed-Back
True RMS-Level Sensor
Variable Lows / Highs
YES
-
±12dB
-2dBu input, +2dBu output
Transformer Balanced / Unbalanced (Floating) with optional DITOS output
Linkwitz–Riley
70Hz to 1KHz
1:1 to inf:1
both bands
-40dBu to +10dBu
both bands
Auto Fast / Slower
F: 5‐7ms / S: 10-15ms
F: 70ms / S: 100‐220ms
-6dB to +20dB
both bands
Hard / Soft
both bands
Unbalance Make-up Gains around X-over frequency pivot
-
YES
MK1
-
6-LED
both bands
-
9-18VDC center negative
Ø 5.1/2.1mm, 12mm long
< 95mAh @ 9VDC
< 170mAh @ 18VDC
Compressor / Limiter
Single Channel
1
Blackmer® VCA
Feed Forward / Feed-Back
True RMS-Level Sensor
Variable Lows / Highs
YES
Flat, Spark, Tight, Punch
-
-
Transformer Balanced / Unbalanced (Floating)
with optional DITOS DI board
-
1:1 to inf:1
-45dBu to +10dBu
Auto Fast / Slower
F: 5‐7ms / S: 10-15ms
Manual: 0.12 to 12 ms/dB
F / S: 70ms / 100‐220ms
Manual: 1.2 to 120 ms/dB
-6dB to +20dB
Hard / Soft
tilting X-EQ ±6dB
around 1kHz / 330Hz frequency pivots
MK1
YES
MK1
MK1
8-LED
YES
9-18VDC center negative
Ø 5.1/2.1mm, 12mm long
< 35mAh @ 9VDC
< 63mAh @ 18VDC
Compressor / Limiter
Single Channel
1
Blackmer® VCA
Feed Forward / Feed-Back
True RMS-Level Sensor
Variable Lows
YES
-
-
-
-
-
1:1 to inf:1
-40dbu to +10dBu
Auto Fast / Slower
F: 5‐7ms / S: 10-15ms
F: 70ms / S: 100‐220ms
-6dB to +20dB
Hard / Soft
-
-
YES
-
-
5-LED
-
9-12VDC center negative
Ø 5.1/2.1mm, 12mm long
< 25mAh @ 9VDC
< 38mAh @ 12VDC
Compressor
Single Channel
1
Blackmer® VCA
Feed Forward
True RMS-Level Sensor
Normal
YES
-
-
-
-
-
1:1 to inf:1
Lo: -40dBu / Hi: -30dBu
Auto Slow
12ms
220ms
-6dB to +20dB
Hard
-
-
YES
-
-
5-LED
-
9-12VDC center negative
Ø 5.1/2.1mm, 12mm long
< 15mAh @ 9VDC
< 23mAh @ 12VDC

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