Launched in 1967, Quad's highly original, elegantly styled 33 preamplifier and 303 power amplifier were Quad's first all–solid state designs and among the first solid state separates. The 303 may have been one of the first "vertical" amplifiers. Together with the 405 stereo amplifier, which came out in 1975, and the FM2 and FM3 tuners, these products proved to be enduring, widely feted successes from their launch until they were discontinued, the 33 in 1982, the 303 in 1985. Meanwhile, they enjoyed massive production runs, were marketed worldwide, and were much admired for their modern industrial design. It's said that Quad sold 120,000 33 preamps and 100,000 303 amplifiers. Across two versions, the 405 sold even more.

Quad introduced new versions of the 33 and 303 (each component $1599) in 2024, apparently moved to do so by the continuing hot market for originals.

Vinyl is more than sound—it’s a visual ritual. That’s where the Petru Visualizer steps in. Handcrafted with precision and built to react to your music, this unique piece of audio art transforms every spin into a show.

Stemming from the foundation of Kondo Audio Note of Japan, Peter Qvortrup's Audio Note UK is, for many, a custodian of the definitive audio heritage. The debut of each Audio Note piece sparks obsession among adherents—ardor that outstrips mere fandom.