BOSS ME-90B Bass Multi-Effects Processor with AIRD Preamp Technology

The BOSS ME-90B Bass Multiple Effects Processor is an all-in-one effects unit purpose-built for bass players, delivering 93 effect types, ten AIRD preamp models, and 32-bit floating-point processing in a single, stage-ready floor unit. With its intuitive stompbox-style interface and direct XLR output, the ME-90B handles everything from rehearsal to live performance to USB studio recording without compromise.

For bassists evaluating the best multi-effects processor for bass guitar, the ME-90B stands out with six simultaneous effect categories, a built-in expression pedal, and a Blend knob that mixes in direct bass signal for preserved low-end clarity. Whether you're building sounds for a live rig or looking for an all-in-one bass effects unit for live performance, the ME-90B eliminates the need for a separate DI box, amp simulator, or audio interface. Its rear-panel AMP/LINE switch optimizes the 1/4-inch outputs for either a stage amp or a full-range PA system in seconds.

BOSS Tone Studio software for Windows, macOS, iOS, and Android extends the ME-90B's capability further, enabling deep parameter editing, effect type swapping, memory organization, and custom speaker IR loading. Up to three user speaker IRs can be stored onboard, giving players precise cabinet simulation tailored to their rig. The optional BT-DUAL Bluetooth adaptor adds wireless editing and audio streaming from mobile devices, while BOSS Tone Exchange provides a global community of downloadable Livesets for instant inspiration.

Key Features of the BOSS ME-90B Bass Effects Processor

• AIRD Bass Preamp Models: Ten preamp types powered by BOSS's Augmented Impulse Response Dynamics technology deliver authentic amp character - from vintage classics to modern high-gain and acoustic-electric voicings - with dedicated gain and EQ controls for fast tone shaping.
• 93 Effects Across Six Categories: Compressors, filters, drive and synth, modulation, delay, reverb, and expression pedal effects can all run simultaneously, giving you a complete signal chain in one unit without patching multiple pedals.
• Stompbox-Style Knob Interface: Independent parameter knobs for each effect category enable instant real-time tweaking without menu diving, and Manual mode turns each footswitch into a direct on/off stompbox control.
• Versatile Output Routing: Stereo 1/4-inch outputs, a mono XLR balanced output with ground lift, and a rear-panel AMP/LINE optimization switch ensure the ME-90B integrates cleanly with any stage or studio configuration.
• USB-C Audio Interface: The USB-C connector streams high-quality audio directly to your DAW for silent practice, direct recording, or playback of backing tracks through the headphone output - no separate audio interface required.
• User Speaker IR Loading: Load up to three custom cabinet IRs onboard to tailor your direct sound beyond the factory preamp models, a feature previously reserved for higher-end rack processors.
• 72 Memories with Preset and User Slots: 36 preset memories and 36 user slots let you store complete multi-effect setups and recall them instantly with a single footswitch press in Memory mode.
• Battery or AC Operation: Four AA batteries provide approximately six hours of continuous use, making the ME-90B fully functional without a power outlet for rehearsals, pit gigs, and busking situations.

Technical Specifications

• Sampling Frequency: 48 kHz
• AD Conversion: 24-bit (with Adaptive Focus method)
• DA Conversion: 32-bit
• Processing: 32-bit floating point
• Total Effect Types: 93
• Onboard Preamp Models: 10 (AIRD technology)
• User Memories: 36
• Preset Memories: 36
• Phrase Loop: 38 seconds (mono)
• Tuning Accuracy: +/-0.1 cent
• Nominal Input Level (INPUT/RETURN): -10 dBu
• Maximum Input Level (INPUT/RETURN): +7 dBu
• Input Impedance (INPUT/RETURN): 1 M ohm
• Nominal Output Level (OUTPUT L/MONO, R): -10 dBu
• Output Impedance (OUTPUT L/MONO, R): 1 k ohm
• Output Impedance (PHONES): 44 ohms
• Output Impedance (BALANCED OUTPUT): 600 ohms
• Connectors: 1/4" INPUT, 1/4" OUTPUT (L/MONO, R), 1/4" SEND, 1/4" RETURN, XLR BALANCED OUTPUT, Stereo Mini PHONES, USB-C, Bluetooth Adaptor port, DC IN
• Power Supply: 4x AA alkaline batteries or AC adaptor (PSA-S series, sold separately)
• Current Draw: 195 mA
• Battery Life: Approximately 6 hours (alkaline)
• Width: 17-1/2 inches (443 mm)
• Depth: 8-11/16 inches (220 mm)
• Height: 2-11/16 inches (67 mm)
• Maximum Height (with expression pedal): 3-11/16 inches (93 mm)
• Weight (including batteries): 6 lbs 7 oz (2.9 kg)

What's in the Box

• BOSS ME-90B Bass Multiple Effects Unit
• 4x AA Alkaline Batteries
• Startup Guide
• Leaflet "USING THE UNIT SAFELY"