Bad Cat Amplifiers was founded in 1999 by James Heidrich in Costa Mesa, California, emerging from a gap in the boutique amplifier market. Every Bad Cat amplifier is built by hand using point-to-point wiring and individually selected components, with the company's founding philosophy being that exceptional tone cannot come off an assembly line. Early amplifier designs drew on the lineage of the Class A boutique amp tradition, and the Hot Cat model — a two-channel design praised for achieving high gain while retaining clarity and articulation uncommon in Class A circuits — helped establish the brand's reputation, earning multiple Guitar Player magazine Editors' Pick awards.

The brand's lineup is organized across several series. The Hand-Wired Series includes premium models such as the Cub V and Era 30. The Player Series II covers the Cub, Black Cat, Hot Cat, Jet Black, and Lynx in head and combo configurations. The Mod Shop Series features limited collaborative designs, and the Lunchbox Series offers compact options like the Ocelot. Bad Cat also produces speaker cabinets in 1x12, 2x12, and 4x12 configurations, along with effects pedals. The Black Cat has earned recognition including Premier Guitar's Premier Gear award and Guitarist Magazine's Gear of the Year.

Bad Cat has attracted a wide range of players across blues, rock, metal, pop, and country. Artists associated with the brand include Billie Joe Armstrong (Green Day), Brad Whitford (Aerosmith), Keith Urban, Bonnie Raitt, Steven Wilson (Porcupine Tree), Tosin Abasi (Animals as Leaders), Jamie Cook (Arctic Monkeys), John Rzeznik (The Goo Goo Dolls), Marc Ford (The Black Crowes), James Valentine (Maroon 5), Teppei Teranishi (Thrice), and Paul Sidoti (touring with Taylor Swift), among many others.

Bad Cat has 139 products cataloged on Equipboard, including Combo Guitar Amplifiers, Guitar Amplifier Heads, and Guitar Amplifier Cabinets. Their gear is featured by 74 artists, with the strongest followings in Rock, Pop, and Folk, World, & Country. Notable users include Steven Wilson, Tosin Abasi, and Eric Cannata. Most Bad Cat products sit firmly in the high-end, boutique range.