Dover is a British boutique amplifier company based in Sheffield, England, producing handbuilt all-valve amplifiers, cabinets, and preamp pedals. The product lineup centers on the DA-50, a 50-watt two-channel head running ECC83 preamp valves into a pair of EL34s, and the smaller DA-20, a 20-watt head with EL84s in the power section. The range extends to the DA-20C combo, matched 1x12 and 2x12 cabinets (DA-112, DA-212), and a bass-side counterpart with the DA-50B head paired with DA-210H and DA-115 cabinets.

Construction emphasizes premium materials, with chassis made from Sheffield steel and military-grade electronic components, sourced and assembled in-house. The company also produces floor units that translate its amplifier voicings into pedalboard form: the DA-GVP (Guitar Valve Preamp) and the DA-BVP (Bass Valve Preamp), both two-channel all-valve preamps designed to deliver Dover's British-voiced tones into any clean front-end or direct setup.

Dover positions its amplifiers in the high-end pedal-platform segment, with voicings that lean modern British — articulate cleans through to medium-gain crunch — rather than the vintage-Marshall or American-clean templates more common among UK builders.

Dover has 2 products cataloged on Equipboard, including Guitar Amplifier Heads. Their gear is featured by 1 artist, with the strongest followings in Rock. Notable users include Joss Allen.