• All-in-one bass processor
• 61 effects from the BOSS bass effects library
• Ten built-in AIRD preamp models
• Dedicated preamp section plus six simultaneous effects
• Eight multifunctional foot switches and an expression pedal with toe switching
• Load up to three user speaker IRs

Boss ME-90B Bass Multi-Effect

• All-in-one bass processor with premium BOSS amplifiers and effects.
• Intuitive user interface with button-based interface.
• 24-bit AD and 32-bit DA conversion, 32-bit floating point processing and 48 kHz sampling rate.
• 61 effects from the BOSS bass effects library.
• Ten built-in AIRD preamp models.
• Dedicated preamp section plus six simultaneous effects.
• Full control and editing in BOSS Tone Studio via USB.
• Also use it as USB audio interface.
• Eight multifunctional foot switches and an expression pedal with toe switching.
• 36 preset memories and 36 user memories.
• Manual mode for pedalboard-style operation and Memory mode for switching between patches.
• Blend button to mix in the direct bass sound.
• Send/return loop for external pedals
• Lightweight, robust design for life on stage.
• Load up to three user speaker IRs.
• Powered via fire AA batteries (included) or AC adapter (must be purchased)
• Download and share ME-90B Livesets at BOSS Tone Exchange.
• BluetoothThe Audio MIDI Dual Adapter allows you to edit sounds and stream audio from an iOS or Android mobile device (must be purchased).

Sampling Frequency 48 kHz
AD Conversion 24 bits + AF method
AF method (Adaptive Focus method) This is a proprietary method from Roland & BOSS that vastly improves the signal-to-noise (SN) ratio of the AD converters.
DA Conversion 32 bits
Processing 32-bit floating point
Effects 93 Types
Memories 36 (User) + 36 (Preset)
Phrase Loop 38 sec. (MONO) Internal Tuning Detection Accuracy±0.1 cent
Nominal Input Level

INPUT: -10 dBu
RETURN: -10 dBu
Maximum Input Level

INPUT: +7 dBu
RETURN: + 7dBu
Input Impedance

INPUT: 1 M ohm
RETURN: 1 M ohm
Nominal Output Level

OUTPUT L/MONOR: -10 dBu
PHONES: -10 dBu
SEND: -10 dBu
BALANCED OUTPUT: -10 dBu
Output Impedance

OUTPUT L/MONO, R: 1 k ohm
PHONES: 44 ohms
SEND: 1 k ohm
BALANCED OUTPUT: 600 ohms
Recommended Load Impedance

OUTPUT L/MONO, R: 10 k ohms or greater
PHONES: 44 ohms or greater
SEND: 10 k ohms or greater
BALANCED OUTPUT: 600 ohms or greater
Display 7 segments, 2 characters (LED)
Tuning guides (LED)
Connectors

INPUT jack, OUTPUT (L/MONO, R) jacks, SEND jack, RETURN jack: 1/4-inch phone type
BALANCED OUTPUT jack: XLR type
PHONES jack: Stereo miniature phone type
USB COMPUTER port: USB Type-C(R)
Bluetooth ADAPTOR connector: Dedicated connector
DC IN jack
Power SupplyAlkaline battery (AA, LR6) x 4 or AC adaptor
Current Draw 195 mA
Expected battery life under continuous use:

Alkaline battery: Approximately 6 hours
* This can vary depending on the specifications of the batteries, capacity of the batteries, and the conditions of use.

Accessories

STARTUP GUIDE
Alkaline battery (AA, LR6) x 4
Leaflet "USING THE UNIT SAFELY"

Options (sold separately)

AC adaptor: PSA-S series
Bluetooth (R) Audio MIDI Dual Adaptor: BT-DUAL
Carry Bag: CB-ME80,CB-BU10

Width 443 mm
Depth 220 mm
Height 67 mm
Maximum Height 93 mm
Weight (including battery) 2.9 kg