Boss ME-90B Bass Multiple Effects

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

- All-in-one bass processor with premium BOSS amps and effects
- Easy stompbox-style sound creation with an intuitive knob-based interface
- Superior sound quality with 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 onboard AIRD preamp models including newly developed types
- Dedicated preamp section plus six simultaneous effect categories with multiple types to choose from
- Edit parameters, swap out preamp and effect types, and more with BOSS Tone Studio
- Eight multi-function footswitches and an expression pedal with toe switch
- 36 ready-to-play preset memories and 36 user memories for storing custom setups
- Manual mode for pedalboard-style operation and Memory mode for switching complete setups
- Blend knob for mixing in the direct bass sound
- Stereo 1/4-inch outputs and mono XLR balanced output with ground lift switch
- Rear-panel switch to optimize the 1/4-inch audio outputs for a bass amp or full-range sound system
- Send/return loop for external pedals
- Light, durable design and colorful status LEDs
- Load up to three user speaker IRs
- Powered via four AA batteries or optional AC adaptor
- USB-C® connector for communicating with BOSS Tone Studio and audio recording/playback with music production software
- Download and share ME-90B Livesets on BOSS Tone Exchange
- Optional Bluetooth® Audio MIDI Dual Adaptor allows you to edit sounds and stream audio from an iOS or Android mobile device

- Weight: 2.900kg
- Height: 220mm
- Width: 443mm
- Depth: 67mm

- 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/MONO､R: -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
Controls
- BANK▼/AMP/EQ switch, BANK▲/MOD switch, CTL/BLEND switch,
- MEMORY/MANUAL switch, 1/COMP switch, 2/FILTER switch,
- 3/DRV/SYN switch, 4/DLY/REV switch, PEDAL FX switch,
- GND LIFT switch, AMP/LINE switch, POWER switch,
- EXIT button, WRITE button, CTL button, EDIT button,
PREAMP TYPE knob, BASS knob, MIDDLE knob, TREBLE knob, GAIN knob, LEVEL knob, ､
- MOD TYPE knob, TYPE knob, RATE/TIME knob, DEPTH/DUTY/FB knob, E.LEV/RESO knob,
- BLEMD knob,
- COMP/FX1 TYPE knob, SUSTAIN/LOW/-1OCT knob, ATTACK/HIGH/-2OCT knob, LEVEL/DIRECT knob,
- FILTER/FX2 TYPE knob, SENS/RATE/KEY knob, TONE/DEPTH/HRM knob, PEAK/LEVEL/RESO knob,
- DRIVE/SYNTH TYPE knob, DRIVE knob, TONE knob, LEVEL knob,
- DLY/REV TYPE knob, TIME knob, FEEDBACK/TONE knob, E.LEVEL knob, OUTPUT LEVEL knob, PEDAL FX TYPE knob,
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 Supply
- Alkaline 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.