The BOSS ME-50B puts world-class bass effects in a rugged floor unit with easy pedal-style control. Effects are divided into six sections—Compressor/Limiter, Master, Filter/Tone, Drive/Synth, Delay/Modulation and Expression Pedal—giving bassists a range of unique and powerful tones including new effects like Sound Hold, Octave Up and Kick Drum. Effects can be edited using 23 knobs and controlled via three built-in footswitches and an assignable expression pedal. This is the piece no bass player should be without!

AD Conversion24 bit + AF method*DA Conversion24 bitSampling Frequency44.1 kHzPatches24 (user)EffectsCompressor / Limiter
Filter / Tone: T. Wah, Octave (Up / Down), Slow Gear, Defretter, Enhancer, Bottom Boost, Mid Shape, Hollow
Drive / Synth: Overdrive / Distortion, Bass Synth
Delay / Modulation: Delay, Phaser, Flanger, Chorus, Reverb
Noise Suppressor
Master EQ
Effects for Expression Pedal: Foot Volume, Wah, Resonance, Bend (+1 OCTAVE, -1 OCTAVE), Sound Hold, Kick DrumNominal Input LevelINPUT: -10 dBu
AUX IN: -10 dBuInput ImpedanceINPUT: 1 M ohms
AUX IN: 100 k ohmsNominal Output Level-10 dBuOutput Impedance2 k ohmsDisplay7 segments, 1character LEDConnectorsINPUT jack
OUTPUT jacks L (MONO)/ R
AUX IN jack (Stereo Mini type)
PHONES jack
FOOT SW (COMP ON/OFF, TEMPO)
AC Adaptor jackPower SupplyDC 9 V: Dry batteries (R6/LR6 (AA) type) x 6, AC Adaptor (PSA series: Optional)Current Draw140 mAAccessoriesOwner’s Manual
Dry Batteries (Alkaline: LR6 (AA) type) x 6OptionsAC Adaptor: BOSS PSA series