Here's a early 90s Les Paul Studio, sitting next to a Silvertone 1472 and a Danelectro DS-50. This is the key to great sludge rock tone, folks. Just punish these cranky old amps with a modern high-output pickup and enjoy the carnage. The Silvertone gets particularly scary when cranked. The Danelectro has cool retro-futuristic styling, and the same "piggyback" design as the Silvertone Twin Twelve - the head just slides into the back of the cabinet. Sweet.