Boss Waza Tube Amp Expander Core Amplifier Attenuator and Cabinet Emulator with Reactive Load

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Boss Waza Tube Amp Expander Core Amplifier Attenuator and Cabinet Emulator with Reactive Load

Supreme Tube Tones at Any Volume

A tube-based guitar amp sounds and feels its best when the volume is cranked and its power section is really working. Unfortunately, the levels produced are usually unmanageable for anyone without an isolation booth or very forgiving neighbors.

The WAZA Tube Amp Expander Core solves this issue, capturing your amp’s speaker output with a reactive load and selectable options that accurately emulate combo and stack-style speaker behaviors. The sound goes directly to the internal 30-watt reactive drive power amp, ready to connect to an external cab for low-volume practice. The same signal is also sent through the unit’s speaker cab emulations and effects processing, giving you a polished feed for direct recording applications.


Premium Speaker Sounds

The companion editor software provides a studio playground for shaping the raw amp sound within the WAZA Tube Amp Expander Core. Choose from 22 BOSS cabinet emulations and five classic mic types (two available simultaneously) and dial in the ideal blend with position, distance, and level controls. Alternatively, it’s possible to use up to two speaker cab IRs at once, either from the included Celestion Digital IRs or selections from your personal IR library. With the time alignment function, you can precisely line up IR combinations for the smoothest tone.


Professional Recording Tools

The WAZA Tube Amp Expander Core contains powerful tools to help you achieve world-class recorded tones—with no engineering experience required. Developed with top guitarists and studio engineers, the Mix Assist function lets you apply one of three sound contour curves with variable transient control. This makes it easy to record parts that blend perfectly within mixes, drastically improving your production quality. There’s also an immersive Air Feel feature that uses BOSS spatial technology to recreate the inspiring “amp-in-room” tone that guitarists love. The two Air Feel studio variations deliver realistic richness, depth, and dimension, providing more natural results than the room mics typically used to add space to guitar recordings.


Effects and Rigs

Effect processing plays a vital role in crafting great studio guitar tones. The WAZA Tube Amp Expander Core features a series/parallel loop for inserting your preferred mod and ambience effects, positioned after the amp’s distortion for the clearest sound. There’s also an array of high-quality internal processing, allowing you to apply compression, EQ, delay, and reverb within the unit. You can organize custom setups within the editor—including cab choices and effects—and assign 10 favorites for instant access with the Rig knob on the front panel.


Expansion Options

Using the WAZA Tube Amp Expander Core Editor, you can load 64 of your favorite third-party speaker WAV IRs in addition to the 10 included Celestion Digital IRs.


Features:

• Professional direct tube amp recording solution driven by the advanced Tube Logic design philosophy
• Selectable reactive load retains your amp’s natural feel and interactive response
• Supports most tube amps rated up to 100 watts
• Built-in 30-watt reactive drive power amplifier with continuous volume control
• Mix Assist function optimizes the recorded sound to dramatically improve production quality
• Air Feel feature recreates “amp-in-room” sound with natural depth, dimension, and ambience
• Choose from 22 BOSS cabinet emulations and five selectable mic types (two simultaneously)
• 64 user IR slots supporting mono/stereo WAV files up to 500 ms and 32-bit floating point/96 kHz resolution
• Comes preloaded with 10 Celestion Digital IRs
• Use up to two third-party IRs simultaneously and smooth the sound with onboard time alignment tools
• Premium stereo effects, including compression, parametric/graphic EQ, delay, and reverb
• Ten recallable rig settings for storing favorite setups
• External effect loop with selectable series/parallel operation
• Balanced XLR stereo line outputs for connecting to mixers and recording devices
• USB-C for audio recording and playback with computers and mobile devices
• Headphones output for quiet practice with cranked-up amp tones and immersive Air Feel ambience
• Speaker output for connecting an external cabinet (supports 4 ohms and higher)
• MIDI input for advanced control
• Dedicated WAZA Tube Amp Expander Core Editor (macOS/Windows) for editing and IR loading