Hamish Jackson, who is organising the auction for sales firm mjQ, said: "This equipment has such a fantastic heritage, and the build quality back then was so good, that it is all still in working order. Anything involving The Beatles will always be popular. My father ran an auction in 1980 of stuff from Abbey Road, and a roll of toilet paper which had property of EMI stamped on every sheet sold for £500. A few years ago, the same roll was on eBay for £30,000."