Pricing and availability

We compare 600+ stores and found this item at 8 stores. Prices updated .

Sweetwater
4.5 (11)
$699.99
Amazon
4.8 (6)
$699.99 New
$649.99 Used (Like New)
Reverb
5.0 (1)
$637.87 New
$599.99 Used
Musician's Friend
5.0 (1)
$769.99 $699.99 $70.00 · All time low

Average Price: $705

High-end/Boutique

$299

$600+

Price Tier

Budget

Standard

High-end

Price History

Based on price data from 6 merchants for "Boss Waza Tube Amp Expander Core". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

* Product prices and availability are updated by Equipboard every 24hrs and are subject to change. Equipboard may receive compensation for purchases made at participating retailers linked on this site. This compensation does not affect what products or prices are displayed, or the order of prices listed. For more information, please refer to our affiliate disclosure.

Description

Elevate your tube amp's capabilities with the Boss Waza Tube Amp Expander Core, a powerhouse for guitarists who crave that cranked-up tube sound without the hassle of excessive volume. Designed with BOSS's renowned Tube Logic technology, this unit bridges the gap between classic tube tone and modern flexibility. Whether you're performing on stage or crafting tracks in the studio, the Expander Core ensures your amp's performance is always at its peak.

Unleash your amp’s natural characteristics with the selectable Reactive Load control, offering both Combo and Stack settings. Dive into a world of sound-shaping possibilities with 32 cabinet emulations, including Celestion Digital IRs, and 64 user IR slots. With five selectable mic types and the ability to mix signals, your tones will reach studio-quality perfection. The Core's onboard effects, such as compression, EQ, delay, and reverb, provide a versatile sound palette, while the Mix Assist and Air Feel functions ensure your sound sits perfectly in the mix or offers an immersive "amp-in-room" experience.

Connectivity is king with the Expander Core, featuring USB recording, stereo XLR outputs, and an FX loop for external gear. Store up to 10 custom rigs, all accessible via the intuitive Rig knob, and enjoy the freedom to practice silently with the dedicated Phones output. With the optional Bluetooth adapter, wireless editing is at your fingertips.

Key Features:

  • BOSS Tube Logic-driven attenuation with Reactive Load control
  • 32 cabinet emulations and 64 user IR slots
  • Five selectable mic types
  • Onboard effects: compression, EQ, delay, and reverb
  • Mix Assist and Air Feel functions
  • USB recording and stereo XLR outputs
  • FX loop with series/parallel operation
  • 10 recallable rig settings
  • Optional Bluetooth for wireless editing via smartphone (adapter sold separately)

Product specs

Type Reactive Load, Attenuator
Power Handling 100W
Impedance 8 ohms
Attenuation Variable
Ground Lift Yes
Inputs 1 x 1/4" (8 ohm, 100W input),
Outputs 1 x 1/4" (min 4 ohm output), 2 x XLR (L, R Line out)
Headphones 1 x 1/4"
Other I/O 2 x 1/4" (FX Loop), 1 x 5-pin DIN (Midi In), 1 x USB-C
Height 3.89"
Width 7.87"
Depth 7.95"
Weight 4.85 lbs.

FAQs

What is the main function of the Boss Waza Tube Amp Expander Core?

The Boss Waza Tube Amp Expander Core serves as a reactive load and attenuator, allowing guitarists to manage their amplifier's output volume while maintaining tone quality.

Can the Boss Waza Tube Amp Expander Core handle high-wattage amplifiers?

Yes, it can handle amplifiers up to 100 watts, making it suitable for most high-power tube amps.

How does the variable attenuation feature work on the Boss Waza Tube Amp Expander Core?

The variable attenuation allows you to adjust the output volume to suit different environments, from quiet practice sessions to full-volume performances, without sacrificing tone.

What connectivity options are available on the Boss Waza Tube Amp Expander Core?

It offers a 1/4" input, 1/4" and XLR outputs, a headphone jack, FX loop, MIDI input, and USB-C for versatile connectivity with various gear.

Is the Boss Waza Tube Amp Expander Core compatible with 4-ohm speaker cabinets?

Yes, it is compatible with speaker cabinets with a minimum impedance of 4 ohms, providing flexibility in your setup.

BOSSchannel

BOSSchannel

BOSS WAZA Tube Amp Expander Core | Reactive Load Box

Video thumbnail for BOSS WAZA Tube Amp Expander Core | Reactive Load Box by BOSSchannel

BOSS WAZA Tube Amp Expander Core | Reactive Load Box

BOSSchannel

BOSSchannel

Video thumbnail for How I Use the BOSS Waza Tube Amp Expander Core by Leon Todd

How I Use the BOSS Waza Tube Amp Expander Core

Leon Todd

Leon Todd

Video thumbnail for NEW BOSS Waza Tube Amp Expander Core | NAMM 2025 by Guitar Center

NEW BOSS Waza Tube Amp Expander Core | NAMM 2025

Guitar Center

Guitar Center

Video thumbnail for NAMM 2025: BOSS Waza Tube Amp Expander Core by Sweetwater Soundcheck

NAMM 2025: BOSS Waza Tube Amp Expander Core

Sweetwater Soundcheck

Sweetwater Soundcheck

Video thumbnail for Boss WAZA Tube Amp Expander Core | Overview & Sound Demo | NAMM 2025 by Guitar Bonedo

Boss WAZA Tube Amp Expander Core | Overview & Sound Demo | NAMM 2025

Guitar Bonedo

Guitar Bonedo

Reviews

PROS

  • Great sound quality that enhances tone without high volume

  • Medium size, convenient for various setups

  • Comes with a Boss app for detailed editing of effects and settings

  • Adds an FX loop to amps that lack one, improving usability

  • Quiet operation, ideal for nighttime play and recording

  • Helps achieve fuller sound with different guitars, like a Telecaster

CONS

  • Power limitation to 100 watts

  • Compatible only with 8-ohm impedance

  • Additional cost for necessary speaker and thunderbolt cables

  • Complicated firmware update process requiring precise steps

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Boss Waza Tube Amp Expander Core.

Features and functionality

  • The Boss Waza TAE Core offers a reactive load switchable between 'combo' and 'stack', which owners describe as providing fantastic tonal quality.

    Source
  • The effects loop on the Core can be used in series or parallel, offering flexibility for different user setups.

    Source
  • The TAE functions as an audio interface, allowing direct recording via USB, reducing the need for additional conversions and improving signal quality.

    Source

Software and compatibility

  • Some users experienced issues with firmware updates and Bluetooth connection on iOS devices, leading to returns.

    Source

Comparisons

  • Users note that the TAE Core allows for full tube amp saturation, unlike the JHS Little Black Amp Box, which only attenuates preamp signal.

    Source
  • The TAE's attenuation is preferred over the Universal Audio Ox and Two Notes Captor X, especially for its built-in effects and selectable impedance curve.

    Source

Use cases and applications

  • The TAE Core's built-in 30W solid-state power amp is praised for maintaining tube amp sound without additional coloration.

    Source
  • Owners find the TAE excellent for bedroom playing with its variable volume knob, enabling precise control over sound levels.

    Source

User experience

  • Owners mention that at 40% volume, the Core outputs around 100 dB, indicating its capability to handle powerful setups.

    Source
  • Some users experience confusion with monitoring when using the TAE as an audio interface, indicating a potential area for improvement in user guidance.

    Source

Mods and upgrades

  • Using a Weber Z-Matcher is recommended for 2-ohm amps like the Super Reverb to avoid artifacts and maintain sound integrity.

    Source

Other

  • The TAE's built-in effects, particularly the reverbs and delays, are compared to high-end pedal equivalents, offering significant value for those seeking versatile sound processing.

    Source

Based on 0 Reviews and 0 Ratings

5 star
4 star
3 star
2 star
1 star

Genre Usage

Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.

1 alternative for Boss Waza Tube Amp Expander Core, curated by the Equipboard community.

More Boss Guitar Power Attenuators

Accessories & Related Items

Artist usage

Community setups

Gear Guides