Micro Booster MK4 Onboard Guitar Preamp with Push-Push Switch-Pot
The Micro Booster MK4 Onboard Guitar Preamp takes the magnetic pickup’s signal and delivers a controllable boost that can push a guitar amplifier into solo mode on the fly. An integrated two-bands EQ performs soft tonal correction if needed and allows you to use it either as a Clean Flat Boost, Mid Boost, Treble Boost, Boosted V-Cut, etc. depending on your preference or practical application.
Handbuilt to order. Estimated assembly time: 4-6 working days.
The Boost Knob
From buffer level up to +16dB of clean boost with gentle Baxandall EQ and Push-Push True Bypass.
The BECOS Micro Booster MK4 Onboard Guitar Preamp can be installed in any guitar or bass to boost the signal from passive magnetic pickups. It can be powered with one 9V standard alkaline battery or two batteries connected in series for 18V increased headroom. The booster is powered when the instrument cable TS mono plug is inserted into the instrument output. With very low power consumption, the booster can run for months. To conserve energy it is advisable to remove the instrument cable when it is not used.
Built with monolithic amplifiers employing innovative high-performance concepts for pristine audio, the Micro Booster MK4 has an exceptional frequency response and extremely low noise & distortion. This is a replica of the input preamp designed for our CompIQ TWAIN dual-band compressor, with added correction functionality.
The Micro Booster integrates a Baxandall correction stack which adds flexibility for independent tonal tweaking of Lows and Highs – frequency pivot centered around 720Hz. With mild adjustability of +/-6dB at 70Hz and 3.5KHz and zero to +16dB variable general Gain, it can be configured as a Clean Flat Boost or Mid Boost, Treble Boost, Lows Boost, Boosted V-Cut, etc. without going into extremes. With tone knobs centered, the boost is completely flat. When the gain is set to zero, it acts as a silent high-performance buffer.
The Micro Booster MK4 can be optionally configured with a linear B500K switch-pot (used with humbuckers) or with a linear B250K switch-pot (used with single coils) which can be soldered directly on the circuit board. The potentiometer side of the switch-pot is not part of the booster’s circuit. It only replaces a potentiometer in your instrument (volume or tone) while adding the convenience of a signal routing switch on top of it. The mechanical PUSH-PUSH switch side of the switch-pot routes the signal through the booster (switch UP) or sends it True Bypassed straight to the output (switch DOWN). A board-only version is available if you wish to add the Micro Booster MK4 alone, without replacing a potentiometer in your instrument. A separate DPDT switch (not included) needs to be wired for signal routing in such installations.
An iron-made shielding can cover the entire active circuitry to protect it against radiant electromagnetic interference.
The basic interconnecting wires, battery holder, battery clip, and a new TRS output connector are supplied along with the uBST4 board and the optional Push-Push switch-pot.
Several shortcut points are added on the circuit board to eliminate the usage of some wires when reconnecting the replaced potentiometer. Insertion points are also available for a neat transfer of the guitar Tone Capacitor directly on the booster’s board, if the booster is to be placed on top of a tone potentiometer.
The Micro Booster MK4 is pin-compatible with MK3.
|Dimensions||4.9 × 3.2 × 2.8 cm|
250K Switch-Pot (push-push), 500K Switch-Pot (push-push), No Switch-Potentiometer
Input impedance: >1MΩ