Rosewell is a British guitar amplifier company founded by Dave Gascoigne, based in West Yorkshire, England. Gascoigne, whose background spans decades in the television, audio and radio trade, opened the operation as a valve amplifier repair and restoration workshop in 2008, then launched the Rosewell Custom Shop in Doncaster in 2010 to sell his own hand-built amp designs. The company services vintage and modern amplifiers from brands such as Fender, Marshall, Orange, Vox and Ampeg alongside building its own range.

The Custom Shop catalog leans heavily on reinterpretations of classic circuits, often adding modern conveniences like line outputs, reverb and tremolo that the originals lacked. Notable builds include the Custom 100W head, a replica of the Simms-Watts design, and the Bluesbaby, a 15W 5E3 Tweed Deluxe-style combo. Other models such as the Bluesman 30 round out a small lineup focused on hand-wired, point-to-point construction at relatively accessible prices.

Rosewell has supplied amps to a number of UK artists, including members of Arctic Monkeys, The Vaccines and Bill Nelson. The shop's reputation rests on a combination of vintage-style boutique builds and a busy repair bench serving everyone from beginner players to touring professionals and dealers.

Rosewell has 2 products cataloged on Equipboard, including Combo Guitar Amplifiers and Guitar Amplifier Heads. Their gear is featured by 1 artist, with the strongest followings in Rock. Notable users include Jamie Cook.