Boss ME-90B Bass Multi-Effect

5 / 5

Specifications

Product features

Sustainable product: Not specified
Expression pedal: Yes
Effect type: Compressor, distortion, delay, exciter/enhancer, filter, harmonizer, octaver, phaser, reverb
Stereo input: No
Stereo output: Yes
Fx loop: Yes
Speaker/amplifier simulation: Yes
Microphone input: No

Weight and dimensions including packaging

Weight: 3,6 kg
Dimensions: 55,0 x 28,0 x 12,0 cm

Product specifications

BOSS bass guitar multi-effect processor
model: ME-90B
sampling frequency: 48kHz
AD conversion: 24 bit + AF method
AF-method (Adaptive Focus) for improved signal-to-noise ratio for AD conversion
DA conversion: 32-bit
processing: 32-bit floating point
effects: 93 types
preset memory: 36 (user) + 36 (preset)
phrase loop: 38 sec. (output)
internal tuner accuracy: ± 0.1 cent
nominal input level: -10 dBu
nominal input level return: -10 dBu
maximum input level: +7dBu
maximum input level return: + 7dBu
input impedance input: 1 MOhm
input impedance return: 1 MOhm
nominal output level output L/R: -10 dBu
nominal output level phones: -10 dBu
nominal output level send: -10 dBu
nominal output level balanced output: -10 dBu
output impedance output L/R: 1 kOhm
output impedance phones: 44 Ohms
output impedance send: 1 kOhm
output impedance balanced output: 600 Ohms
recommended load impedance output L/R: 10 KOhm or higher
recommended load impedance phones: 44 Ohms or higher
recommended load impedance send: 10 KOhm or higher
recommended load impedance balanced output: 600 Ohms or higher
controls:
- bank: ¼/amp/eq
- bank: ²/mod
- ctl/blend ohm
- memory/manual
- 1/comp
- 2/filter
- 3/drv/syn
- 4/dly/rev
- pedal fx
- gnd lift
- amp/line
- power
- exit
- write
- ctl
- edit
controls:
- preamp type
- bass
- middle
- treble
- gain level
- mod type
- type
- rate/time
- depth/duty/fb
- e.lev/reso
- blend
- comp/fx1 type
- sustain/low/1oct
- attack/high/2oct
- level/direct
- filter/fx2 type
- sens/rate/key
- tone/depth/hrm
- peak/level/reso
- drive/synth type
- drive
- tone
- level
- dly/rev type
- time
- feedback/tone
- e.level
- output level
- pedal fx type
display:
- 2-character, 7-segment LED
- tuning guides (LED)
connections:
- 6.35 mm TS jack input,
- 2x 6.35 mm TS jack output (L/output, R),
- 6.35 mm TS jack send
- 6.35 mm TS jack return
- balanced XLR output
- 6.35 mm TRS jack phones
- USB-type: C
- Bluetooth Adaptor port
power supply: 4x alkaline batteries (AA LR6, included) or 9V DC power supply (not included)
power consumption: 195 mA
battery life using alkaline batteries: approximately 6 hours
dimensions : 443 x 220 x 93mm
weight (including battery): 2.9g
accessories
- startup guide
- 4x Alkaline batteries (AA, LR6)
- leaflet: USING THE UNIT SAFELY
optional accessories:
- power supply: PSA-S series
- Bluetooth Audio MIDI Dual Adaptor: BT-DUAL
- gig bag: CB-ME80, CB-BU10

Specifications

Product features

Sustainable product: Not specified
Expression pedal: Yes
Effect type: Compressor, distortion, delay, exciter/enhancer, filter, harmonizer, octaver, phaser, reverb
Stereo input: No
Stereo output: Yes
Fx loop: Yes
Speaker/amplifier simulation: Yes
Microphone input: No

Weight and dimensions including packaging

Weight: 3,6 kg
Dimensions: 55,0 x 28,0 x 12,0 cm

Product specifications

BOSS bass guitar multi-effect processor
model: ME-90B
sampling frequency: 48kHz
AD conversion: 24 bit + AF method
AF-method (Adaptive Focus) for improved signal-to-noise ratio for AD conversion
DA conversion: 32-bit
processing: 32-bit floating point
effects: 93 types
preset memory: 36 (user) + 36 (preset)
phrase loop: 38 sec. (output)
internal tuner accuracy: ± 0.1 cent
nominal input level: -10 dBu
nominal input level return: -10 dBu
maximum input level: +7dBu
maximum input level return: + 7dBu
input impedance input: 1 MOhm
input impedance return: 1 MOhm
nominal output level output L/R: -10 dBu
nominal output level phones: -10 dBu
nominal output level send: -10 dBu
nominal output level balanced output: -10 dBu
output impedance output L/R: 1 kOhm
output impedance phones: 44 Ohms
output impedance send: 1 kOhm
output impedance balanced output: 600 Ohms
recommended load impedance output L/R: 10 KOhm or higher
recommended load impedance phones: 44 Ohms or higher
recommended load impedance send: 10 KOhm or higher
recommended load impedance balanced output: 600 Ohms or higher
controls:
- bank: ¼/amp/eq
- bank: ²/mod
- ctl/blend ohm
- memory/manual
- 1/comp
- 2/filter
- 3/drv/syn
- 4/dly/rev
- pedal fx
- gnd lift
- amp/line
- power
- exit
- write
- ctl
- edit
controls:
- preamp type
- bass
- middle
- treble
- gain level
- mod type
- type
- rate/time
- depth/duty/fb
- e.lev/reso
- blend
- comp/fx1 type
- sustain/low/1oct
- attack/high/2oct
- level/direct
- filter/fx2 type
- sens/rate/key
- tone/depth/hrm
- peak/level/reso
- drive/synth type
- drive
- tone
- level
- dly/rev type
- time
- feedback/tone
- e.level
- output level
- pedal fx type
display:
- 2-character, 7-segment LED
- tuning guides (LED)
connections:
- 6.35 mm TS jack input,
- 2x 6.35 mm TS jack output (L/output, R),
- 6.35 mm TS jack send
- 6.35 mm TS jack return
- balanced XLR output
- 6.35 mm TRS jack phones
- USB-type: C
- Bluetooth Adaptor port
power supply: 4x alkaline batteries (AA LR6, included) or 9V DC power supply (not included)
power consumption: 195 mA
battery life using alkaline batteries: approximately 6 hours
dimensions : 443 x 220 x 93mm
weight (including battery): 2.9g
accessories
- startup guide
- 4x Alkaline batteries (AA, LR6)
- leaflet: USING THE UNIT SAFELY
optional accessories:
- power supply: PSA-S series
- Bluetooth Audio MIDI Dual Adaptor: BT-DUAL
- gig bag: CB-ME80, CB-BU10

Service promise

Bax Music Warranty This product comes with a 3-year warranty.

This product comes with a 3-year warranty.

Reviews (8)

5.0

8 reviews

Rating

5 stars 8 4 stars 0 3 stars 0 2 stars 0 1 star 0

Write a review

5 / 5

Boss ME-90B Bass Multi-Effect

Loving the ME-90B. Still working on finding 'my' sound on it but discovered Ampeg do their own IRs so have an SVT DI-out on the output and with the Concert SVT preamp or the flip-top it sounds awesome. But also sounds good with an 8x10 IR as well. Also loving the Fat Tube 'Orange' amp. Used mostly for Church band work, I've started dropping a bit of Drive to fatten out the sound which they love, the FoH sound guys love the clean DI and the tone through the PA, going to try running an EH Mono Synth through the send/return and see how that works. Using it on the FX Return on my RM500 amp it sounds great with the SVT DI IR. I like that I can have 2 compressors with different settings, one with really long sustain. Love the Freeze on the pedal, used when we have no keys and need a drone sound. Shimmer is nice, but not quite 'there' for me. Still loads of experimenting to do and incorporate my other pedals. OC-5 imho is better than the ME90B octaves, but the detunen and pich shift are useful. All in all I'm a very happy bunny. :D

April 1, 2026 | MattH

5 / 5

Boss ME-90B Bass Multi-Effect

This pedal is fantastic. It does everything from acting as a clean DI box, with adjustable gain and EQ, up to sounding like you have a synth playing along with you - AND looping. I've only used the preset sounds so far. Out of 36 I've found 6 which are so good I can't imagine being able to come up with anything better - so not yet into editing sounds and saving them. I was initially very attracted by the no-menu knob and footswitch based editing interface but I may never need it! Inspirational sounds, reinvigorated my relationship with Bass!!

March 23, 2026 | Simon F.

5 / 5

Boss ME-90B Bass Multi-Effect

Blimey, the BOSS ME-90B is good! I bought one from Bax a month ago and have been really blown away by the pedal. It is super-easy to dial in a tone that works and save it to one of the user preset slots. Ok, there’s no screen, so you have to remember which preset, but to be honest, I’m a bassist, I don’t use a different one for each song, so it’s not that much of a hardship!

I particularly like the fact that you can create just the right tone by twiddling knobs, rather than having to menu-dive. It’s easy and intuitive to use and the results are great!

For the money, the ME-90B is well worth it. I actually wish I’d bought one sooner!

March 15, 2026 | sunDOG