Second hand Boss ME-20B Bass Multi-Effects Processor
The Boss ME-20B is a COSM-based multi-effects processor designed specifically for bass guitar, offering a streamlined control layout paired with robust digital signal processing. Manufactured in China, this unit is engineered to deliver a wide range of bass-optimized effects while maintaining low-end clarity and dynamic response.
The ME-20B employs Boss’s COSM modeling technology to provide bass-specific preamp voicings and effects that preserve fundamental frequencies while allowing detailed tonal shaping. Effects include compression, overdrive and distortion, modulation, delay, reverb, EQ, and filter-based processing, all tuned to avoid excessive low-frequency loss.
A standout feature of the ME-20B is its knob-per-function interface, which allows immediate parameter access without menu diving. This makes real-time adjustment fast and intuitive in both rehearsal and live environments. The integrated expression pedal can be assigned to volume, wah, pitch, or other effect parameters, enabling dynamic control during performance.
The dual footswitch layout supports patch changes and effect activation, while the sturdy metal chassis is designed to withstand regular stage use. Output options accommodate direct connection to bass amplifiers or recording setups, making the unit suitable for both live and studio applications.
This example is in very good condition, showing only light cosmetic wear and remaining fully operational. It is supplied with the original power supply unit (PSU).
