H&H is a British audio equipment manufacturer founded in 1968 by Mike Harrison near Cambridge, England, before settling into a factory in Bar Hill, Cambridgeshire. The company built its reputation in the 1970s on solid-state power amplifiers aimed at studios and broadcasters, with early models like the TPA50 finding their way into rooms at Apple Records, the BBC, and LWT's Intersound studios.

For working musicians, H&H became best known for a line of guitar, bass, and keyboard amplifiers that were prized for being light, loud, and durable at a time when most stage rigs were still tube-driven. The IC100 combo and head, with its distinctive electroluminescent panel, is the model most commonly associated with the brand, alongside the MA100 mixer-amp and the bass-oriented VS and Bassamp series. The IC-based TPA D range (TPA25D, TPA50D, TPA100D) extended the original TPA line, and the MOSFET-based V series introduced in 1979 — including the V200 and V800 — pushed the company further into high-power PA and installed-sound territory.

The brand sits within the Headstock Group, the UK company that also owns Laney Amplification, and is operated out of Halesowen in the West Midlands as HH Audio. Its catalog is built around live sound and installation gear, including the Tensor and Vector active loudspeaker lines and Aptur portable PA systems, while vintage H&H instrument amps from the 1970s and early 1980s remain widely traded on the second-hand market.

H&H has 3 products cataloged on Equipboard, including Power Amplifiers and Bass Combo Amplifiers. Their gear is featured by 2 artists, with the strongest followings in Rock. Notable users include Eddie Van Halen and John Sykes.