While the solid state transistor revolution lead to most electronic devices getting miniaturized and stuffed into plastic boxes, musicians and other people with ears noticed a that nothing hits the ear quite like a perfectly dialed-in amp powered and voiced by vacuum tubes. The mechanics behind why, and how a Fender differs from a Marshall... that's in the detail, and that's why I sat down, er, stood across the room from Paul Markwalter, owner of Beacon Tube Amps. 

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