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12AX7 | ECC83 | 7025 | CV4004 Preamp Vacuum Tubes
The 12AX7 (ECC83) vacuum tube was invented over 70 years ago and is still an absolute necessity for every electric guitar tube amp and a wide range of hifi audio tube amplifiers. Other 12AX7 tube equivalent part numbers are 7025 and CV4004. Be sure to read our customer reviews to help you find the best 12AX7 preamp tube...More Details
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Another common name for the 12AX7 tube is ECC83 and for premium versions the 7025 and ECC803 audio tubes. Originally, the 12AX7 / ECC83 vacuum tube was introduced to be a superior option for lower noise and microphonics over the 6SL7 tube that was commonly used in the 1940s. As well it offered more gain. Today, a look at almost any guitar tube amp, be it Fender, Marshall, Vox, or any other, will prove the 12AX7 / ECC83 / 7025 tubes are here to stay.