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Guitar World
Guitar World
Entertainment
Matt Owen

“The first of its kind”: The AmpRx Brownie can tweak your amp’s voltage for maximum tone – and it could be your key to finally unlocking Eddie Van Halen’s coveted ‘Brown Sound’

Van Halen Eddie Van Halen
AmpRx Brownie.

NAMM 2025: AmpRx has sought to shake things up for tube amp users by releasing the Brownie – a nifty voltage controller tool that looks to optimize the tone and performance of valve-loaded guitar amps.

Described as “the first of its kind”, it’s a gadget that will likely especially pique the interests of Eddie Van Halen fans – or, indeed, anyone looking to emulate the revered ‘Brown Sound’ high-gain guitar tone he championed.

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