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Boss Tube Amp Expander Demo | NAMM 2025

If chasing big, bold tones is your thing–but you can’t do it at brain-crushing volumes–consider investigating Boss’ Tube Amp Expander. Highly compatible with amps and DAWs, the Expander is a power attenuator with deep controls and adaptability. It’s also easy to use. A dial on the front switches between two impedance settings, appropriate for a combo or a stack. There are 10 rig presents, and it’s easy to design and save your own, too. There’s an “air” dial for ambiance, and speaker, line out, and headphone options. If headphones is your thing, just plug in your amp and don’t worry about a cab. Running with a DAW, a wide world of IRs, effects, and more becomes available. At dealers now at a $699 street price.