Born in the Swinging Sixties, Quad’s famous 33 preamp and 303 power amp are back with a revitalized design and a classic modern-retro twist. What a blast from the past. Born in the Swinging Sixties, Quad’s famous 33 preamp and 303 power amp are back with a revitalized design and a classic modern-retro twist. What a blast from the past. Consumer Tech, /consumer-tech, Innovation, /innovation, Consumer Tech, /consumer-tech, technology, standard