The BOSS ME-20B is a powerful multi-effects unit optimized for live performance. With the same performance-based design as its guitar-focused ME-20 counterpart, the ME-20B is aimed at the performing bassist who wants stage-friendly effects and solid construction at an affordable price. Mix, match, and customize a wide variety of effects, including compressor, overdrive, distortion, T-Wah, phaser, flanger, chorus, delay, reverb, defretter, synth, and more.
Be sure to get the PSA120 power adapter pictured at right.
- Performance-based bass processor for the player who wants an easy-to-use interface with BOSS tone and quality
- New super-tough metal chassis with 3 foot switches, 5 realtime control knobs, and expression pedal
- EZ Edit for quick sound creation
- Unique effects such as Synth, Octave, Defretter, and more
- BASS ENHANCE function for instant presence boost
- 30 user memory locations in addition to realtime operation
- Battery or AC powered with optional PSAA power adapter
AD Conversion
24-bit + AF method (*)
DA Conversion
24-bit
Sampling Frequency
44.1 kHz
Patches
30 (user)
Nominal Input Level
INPUT: -10 dBu, AUX IN: -18 dBu
Input Impedance
INPUT: 1 M ohm, AUX IN: 22 k ohms
Nominal Output Level
-10 dBu
Output Impedance
2 k ohms
Display
7 segments, 2 characters LED
Controls
SFX/1 pedal, COMP/2 pedal, DELAY/3 pedal, Expression pedal
Connectors
INPUT jack (1/4 inch phone type), AUX IN jack (Stereo miniature phone type), OUTPUT jacks L/MONO, R (1/4 inch phone type), PHONES jack (Stereo 1/4 inch phone type), FOOT SW jack (1/4 inch TRS phone type), AC Adaptor jack
Power Supply
DC 9 V: Dry battery LR6/R6 (AA) type x 6, AC Adaptor (PSA series: Optional)
Current Draw
90 mA * Expected battery life under continuous use: Alkaline: 13 hours, Carbon: 3.5 hours (These figures will vary depending on the actual conditions of use.)
Accessories
Owner's Manual, Dry battery LR6 (AA) type (alkaline) x 6, Roland Service (Information Sheet)
Options
AC Adaptor: PSA series, Footswitch: FS-6, FS-5U, Connection Cable: Roland PCS-31 (Stereo 1/4 inch phone plug - 1/4 inch phone plug x 2)
Size and Weight
Width
294 mm
11-5/8 inches
Depth
179 mm
7-1/16 inches
Height
54 mm
2-1/8 inches
Weight
1.6 kg
3 lbs. 9 oz
(Empty) 
