Redplate Amps is a boutique guitar amplifier company based in Phoenix, Arizona, founded in 2006 by Henry Heistand. Heistand was joined in 2008 by business partner Keith Entringer, and the two-person shop hand-wires every amplifier to order. The brand's name comes from the tube-amp term for plates glowing red under load, and its stated design philosophy puts clean tone first, with the goal of producing bloom and sustain before any overdrive is dialed in.

The lineup is built around point-to-point, hand-wired tube combos and heads with custom cabinetry and made-to-order transformers. Models include the BlackVerb, TweedyVerb, BluesMachine, BlackLine, BlackLoop, TweedyDrive, and the HD50R, which is often associated with Dumble-style cleans and overdrive. Amps are typically built to spec after a customer deposit, with options for power, speakers, and cosmetics discussed directly with the builder.

Notable players associated with the brand include Marc Bonilla (California Transit Authority, Keith Emerson Band), Grammy-nominated country artist Hunter Hayes, and singer-songwriter Bill Champlin (Chicago, Sons of Champlin).

Redplate has 4 products cataloged on Equipboard, including Guitar Amplifier Heads and Combo Guitar Amplifiers. Their gear is featured by 2 artists, with the strongest followings in Rock and Blues. Notable users include Neil Citron and Elvin Bishop.