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Boss Waza Tube Amp Expander

  • Our Price
  • Regular price $1,379.99


Experience A Modern Tube Amp Experience With The Boss Waza Tube Amp Expander

Bringing together a diverse range of professional tone tools for the very first time, the Waza Tube Amp Expander elevates the tube amp experience to a new level of versatility for stage performing and studio recording. This amazing device does it all - it's a variable reactive load box, active analog power stage, mic'd cab emulator, IR loader, and recording interface, all in one integrated unit that's road-ready and easy to use.

Backed by Boss' advanced Tube Logic approach, you're able to crank your amp to its sweet spot and play at any volume while faithfully retaining the core tone and feel you love. And with extensive connectivity, built-in BOSS effects, 10 fully customizable rig setups, and deep real-time control, you have unparalleled creative command for any scenario. Packed to the max with breakthrough BOSS innovations, the Waza Tube Amp Expander is an essential companion for every tube amp player.

  • First-of-its-kind tube amp command center, built with Waza expertise and the Tube Logic design approach
  • Advanced variable reactive load circuit with discrete analog components supports tube amps up to 150 watts
  • User-adjustable impedance tuning correctly matches the reactive load to your amp, retaining its natural tone, dynamic feel, and distortion characteristics
  • 10 recallable rig settings for storing favorite setups
  • Deep real-time performance control via GA-FC/FS-series footswitches and MIDI I/O
  • Built-in 100-watt Class AB power amplifier with discrete analog design and seamless volume control
  • Powerful DSP section with 32-bit AD/DA, 32-bit floating-point processing, and 96 kHz sampling rate
  • Customizable stereo effects with premium tone quality: compressor, delay, reverb, and four EQs
  • Twenty-two mic'd cabinet emulations with five selectable close-mic types and three room-mic options, plus four slots for loading user speaker IRs
  • External effects loop with selectable series/parallel operation and control jack for switching amp channels
  • Parallel speaker outputs for connecting up to two cabs for gigging
  • Balanced XLR line outputs (mono and L/R stereo) for connecting to FOH console, stage monitors, and recording devices
  • Headphones output for quiet practice with cranked-up amp tones
  • Dedicated editor software (Mac/Windows)
  • USB for direct audio recording and editor communication
  • Brackets included for rack mounting (4U required: 2U for product and 1U above/below for ventilation)



  • Maximum Input Power: 150 W
  • Input Impedance: 4/8/16 ohms (selectable)
  • Safety Load (power off): 16 ohms


  • Rated Power Output: 100 W (8 ohms)
  • Load Impedance: 4-16 ohms

Nominal Output Level

  • LINE OUT L/R: +4 dBu
  • LINE OUT MONO (FOH): +4 dBu

FX LOOP Nominal Output Level

  • -10/+4 dBu (selectable)

Maximum Output Level

  • LINE OUT L/R: +20 dBu
  • LINE OUT MONO (FOH): +20 dBu
  • FX LOOP SEND: +6 dBu (-10) /+20 dBu (+4)

Input Impedance

  • FX LOOP RETURN: 1 M ohm

Output Impedance

  • LINE OUT L/R: 600 ohms
  • LINE OUT MONO (FOH): 600 ohms
  • FX LOOP SEND: 1 k ohm


  • POWER switch
  • SPEAKER OUT knob
  • LINE OUT knob
  • PHONES knob
  • RESONANCE-Z knob
  • PRESENCE-Z knob
  • RIG knob
  • REVERB knob
  • FX LOOP button
  • EFFECTS button
  • SOLO/EQ button
  • AMP CTL button
  • INPUT LEVEL switch
  • L/R GND LIFT switch
  • MONO (FOH) GND LIFT switch
  • LOOP switch
  • LEVEL switch
  • SEND GND LIFT switch
  • RETURN GND LIFT switch
  • AMP CTL switch




  • FROM TUBE AMP jack: 1/4-inch phone type
  • SPEAKER OUT jacks (OUT A, OUT B): 1/4-inch phone type
  • LINE OUT L/R connectors: XLR type
  • LINE OUT MONO (FOH) connector: XLR type
  • PHONES jack: Stereo 1/4-inch phone type
  • SEND jack: 1/4-inch phone type
  • RETURN jack: 1/4-inch phone type
  • FX LOOP jack: 1/4-inch phone type
  • GA-FC jack: 1/4-inch TRS phone type
  • AMP CTL jack: 1/4-inch phone type
  • USB COMPUTER port: USB B type
  • MIDI (IN, THRU/OUT) connectors
  • AC IN jack
  • Power Consumption
  • 100 W


  • Owner's manual
  • Power cord
  • Rack mount angle x 2 (for EIA-2U)
  • GA-FC sticker

Options (sold separately)

  • Footswitch: BOSS FS-5L
  • Expression pedal: Roland EV-5, BOSS FV-500H, BOSS FV-500L, BOSS EV-30
  • GA Foot Controller: BOSS GA-FC

Manufacturer: Boss
Warranty: See manufacturer website for details
SKU: I588245-N-1-B
UPC: 761294513590

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