BOSS WAZA Tube Amp Expander Core

The BOSS WAZA Tube Amp Expander Core is a reactive-load and direct-recording processor for guitar tube amps. Its listed features include cab emulations, stereo effects, XLR outputs, USB-C recording and a headphone output, with a built-in 30-watt reactive drive power amplifier for use with a cabinet.

At a glance

Selectable reactive load is described as retaining an amp's natural feel and response for direct recording.
Includes 22 cabinet emulations and five selectable mic types, with two mic types usable simultaneously, according to the listing.
Air Feel is intended to recreate an amp-in-room impression, while Mix Assist is offered for shaping recorded sound.
Stereo processing includes compression, parametric and graphic EQ, delay and reverb, plus ten recallable rig settings.
Balanced stereo XLR line outputs and USB-C support connections to mixers, recording devices, computers and mobile devices.
Headphone output supports quieter practice. Editor software for macOS and Windows is listed for editing and IR loading.

Price

$599.99Save 22%

Reference price: ~~$769.99~~

Price checked: Nov 12, 2026

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Pros and cons

Pros

Cabinet and mic choices, stereo effects and ten stored rig settings combine recording and tone-shaping functions in one unit.
XLR stereo outputs and USB-C provide options for direct recording and computer or mobile-device audio.
The listed headphone output and 30-watt reactive drive amp support quiet practice and use with a cabinet, respectively.

Cons

No drawbacks are established by the supplied evidence.

Technical specifications

13 specifications

Identity
Brand	BOSS
Model	WAZA Tube Amp Expander Core
Amplifier type	Tube
Compatible device	Guitar

Audio and connectivity
Listed output wattage	100 watts
Output channel quantity	2
Audio output mode	Stereo
Connector types	3.5mm Jack, 6.35mm Jack, USB, XLR
Tone-control bands	3

Dimensions and installation
Dimensions (D x W x H)	6"D x 11.2"W x 12.95"H
Weight listed	4.9 pounds

Materials and appearance
Material listed	Metal
Color	Black

What to know before buying

Listing details to confirm

The listing's specifications are inconsistent: it calls the product an amp expander, identifies its amplifier type as Tube and lists 100 watts output, while its feature text describes a built-in 30-watt reactive drive power amplifier. The feature text says it supports most tube amps rated up to 100 watts but excludes Mesa Boogie Dual and Triple Rectifier models. Confirm amp compatibility and the meaning of the 100-watt figure before purchase.

Who is it for?

A good fit for

Guitarists seeking reactive-load direct recording with cabinet and mic emulations.
Players who want stereo effects, recallable setups and XLR or USB-C recording connections.
Home users who want a headphone output or a lower-level cabinet setup using the built-in reactive drive amplifier.

Less suited to

Buyers seeking a standalone guitar amplifier rather than a tube-amp expander and recording processor.
Owners of Mesa Boogie Dual or Triple Rectifier amps, which the listing explicitly excludes from its stated up-to-100-watt compatibility claim.

BOSS WAZA Tube Amp Expander Core · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 7 ratings

5 stars64%64%
4 stars36%36%
3 stars0%0%
2 stars0%0%
1 star0%0%

The supplied rating information is positive overall, with ratings in the four- and five-star categories. The sample is small and contains no written feedback here, so it cannot establish specific strengths or concerns. Treat it as limited context rather than evidence of recording quality, compatibility or ease of use.

Frequently asked questions

Can the WAZA Tube Amp Expander Core record directly?

The listing describes direct-recording features, balanced stereo XLR outputs and USB-C audio recording and playback with computers and mobile devices.

What cabinet and microphone options are listed?

The listing claims 22 BOSS cabinet emulations and five selectable mic types, with two mic types available simultaneously.

Can it be used for quiet practice?

A headphone output is listed for quiet practice. The listing also describes a built-in 30-watt reactive drive power amplifier for use with a cabinet.

Which tube amps does the listing say it supports?

The feature text claims support for most tube amps rated up to 100 watts, excluding Mesa Boogie Dual and Triple Rectifier models. The separate 100-watt output specification conflicts with the stated 30-watt drive amplifier, so confirm compatibility and ratings for your setup.