The Deacy Amp (pronounced "Deeky" /ˈdiːki/) is an electric guitar amplifier created in 1972[1] by Queen's bassist John Deacon, who is an electronics engineer by training.
The amplifier circuit board from a Supersonic PR80 portable radio found in a builder's skip (dumpster) was fitted into a speaker cabinet and powered by a 9-volt battery.
[2] In 1998, Greg Fryer undertook the job of trying to make three copies of the Deacy Amp with May's full backing with the help of UK amplifier specialist Dave Petersen.
[3] This mains-powered unit combined a treble booster with the sound of the Deacy amp circuit with a 10W amplifier pushing an integrated 1 × 6.5" twin cone speaker.
The amp featured a unique white vinyl covering on a traditional-looking Vox amplifier design with a Brian May 'Back to the Light' star logo in the lower right corner of the grille cloth.