Boss ME-50B bass multiple effects floor unit. A dedicated bass processor built around a hands-on, analog-style layout where each effect parameter has its own dedicated knob, so there is zero menu scrolling required.

Fully tested and 100% operational. All three main effect pedals click positively with immediate LED response, the expression pedal sweeps smoothly through wah, octave, and volume functions, and the LED display is bright. All rotary selector switches and parameter pots turn smoothly without scratchiness. It offers a dedicated analog-style Compressor/Limiter section, Master 3-band EQ with sweepable mid frequency, Filter/Tone effects (including envelope filters, defretter, and octave), Drive/Synth modes, and Modulation/Delay. Rear stereo 1/4-inch outs, headphone jack, aux-in, and foot switch input all work cleanly.

Condition Details: Functionally rock-solid (sounds great!), but cosmetically this is a player-grade unit with honest cosmetic wear. The top faceplate graphics and text remain clean and legible, and all original knob caps and footswitch pads are intact. The side panels show visible cosmetic wear, specifically heavy paint chipping and rubbing down to the bare metal along the right side edge and light paint nicking along the left edge by the expression pedal. The underside has surface scratching from normal floor use, but the battery door, serial number sticker, and four rubber feet are intact. I have included dedicated photos of both sides and the bottom so you can see the wear clearly.

What is Included:

• Boss ME-50B bass multi-effects unit
• Compatible 9V DC power supply adapter

Packed securely with heavy bubble wrap in a sturdy box, tracked, and insured. Ships fast to the continental US. Feel free to reach out with any questions.