Boss Waza Craft Tube Amp Expander Core - Used

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This used Boss will ship insured and inspected from Rapid City, SD. This unit is in mint condition.

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Every great tube amplifier has a sweet spot: That magical point where the power section comes alive, the harmonics bloom, and every note responds with effortless touch sensitivity. The challenge has always been reaching that point without overwhelming a room, a studio, or the neighbors. The Boss Waza Craft Tube Amp Expander Core was created to solve that problem, giving guitarists a professional reactive load, cabinet simulator, attenuator, recording interface, and effects processor in one remarkably powerful unit. Available at Haggerty's Music, this used model includes the original AC adapter and power cord, making it ready to integrate into virtually any tube amp setup.

Built around Boss's acclaimed Tube Logic technology, the Tube Amp Expander Core faithfully captures the interaction between your amplifier's power section and a real speaker load, preserving the feel, dynamics, and responsiveness that players demand from their favorite tube amps. Its selectable reactive load supports amplifiers up to 100 watts, while the built-in 30-watt reactive power amplifier lets you enjoy fully driven tube tones through a speaker cabinet at practical volume levels. Whether you're practicing at home, recording silently through headphones, or sending polished direct signals to a mixer or audio interface, the Tube Amp Expander Core maintains the authentic character of your amplifier every step of the way.

The recording and tone-shaping capabilities elevate this unit far beyond a traditional attenuator. Twenty-two Boss cabinet emulations, support for 64 user impulse responses, stereo Air Feel processing, Mix Assist technology, premium onboard effects, MIDI control, USB-C recording, and expandable Bluetooth compatibility make it an incredibly flexible centerpiece for modern guitar rigs. From silent recording sessions and live direct performance to low-volume practice with your favorite tube head, the Boss Waza Craft Tube Amp Expander Core offers an uncompromising solution for players who refuse to sacrifice great tone.

Features / Specs

Highlights

• Effect Type: Reactive Load Box / Attenuator / Cabinet Simulator / Recording Interface
• Technology: Boss Tube Logic Reactive Load
• Analog/Digital: Digital Processing with Reactive Analog Load
• Maximum Tube Amp Input: 100 Watts
• Power Amplifier: Built-In 30-Watt Reactive Drive Power Amp

Controls

• Speaker Output: Continuous Volume
• Line Output: Level
• Headphone Output: Level
• Reactive Load: Selectable Load Response
• Rig Selection: 10 Recallable Presets
• Air Feel: Adjustable Spatial Processing
• Input Level: Switchable
• FX Loop Level: -10 dBu / +4 dBu Selectable
• Ground Lift: Switch
• Write: Preset Store

Speaker Simulation & Processing

• Cabinet Models: 22 Boss Cabinet Emulations
• Impulse Responses: 64 User IR Slots
• Included IRs: 10 Celestion Digital IRs
• Microphone Models: 5 Selectable Types (Dual Mic Support)
• Air Feel: Stereo Amp-in-Room Processing
• Mix Assist: Three Production-Optimized Contour Modes
• Internal Effects: Compression, Parametric EQ, Graphic EQ, Delay, Reverb

onnectivity

• Tube Amp Input: 1/4"
• Speaker Output: 1/4" (Supports 4–16 Ohm Cabinets)
• Line Outputs: Stereo Balanced XLR
• Headphone Output: Stereo 1/4"
• Effects Loop: Send/Return (Series or Parallel)
• USB: USB-C Audio Interface
• MIDI: MIDI In
• Bluetooth: Optional BT-DUAL Adapter Compatible

Performance

• Load Impedance: 4–16 Ohms
• Input Impedance: 8 Ohms (Tube Amp Input)
• FX Return Impedance: 1 MΩ
• Line Output Impedance: 600 Ω
• FX Send Output Impedance: 1 kΩ
• Nominal Line Output: +4 dBu
• Maximum Line Output: +13 dBu
• Current Draw: 470 mA

Power

• Power Supply: External AC Adapter (Included)

Miscellaneous

• Accessories: AC Adapter, Power Cord
• Missing: Original Box, Instruction Manual
• Serial Number: Z2S1931