Sylvania 12AX7's

Sylvania 12AX7 – Vintage NOS USA-Made Preamp Tubes Four Types. One Legendary Sound. While RCA, Mullard, and Telefunken get most of the glory, those in the know recognize Sylvania 12AX7s as one of the best-kept secrets in the NOS tube world. These American-made preamp tubes deliver top-tier performance at a far more accessible price, making them ideal for players and audiophiles looking to upgrade without breaking the bank. From pristine clean tones to rich warmth and gritty breakup, Sylvania 12AX7s offer exceptional tonal variety. That’s because they weren’t just made one way—Sylvania manufactured four distinct versions over nearly three decades, each with its own sonic personality: Long Grey Plates (1960s–early '70s) The most well-known Sylvania variant. These tubes are warm, spacious, and remarkably clean—offering a touch of added headroom compared to typical long plates. Perfect for blackface Fenders, pedal platforms, and HiFi setups that crave shimmer without harshness. Long Bla