12AX7 / ECC83 / 7025
The 12AX7 is by far the most common out of all preamp tubes. Also known as the ECC83 or the 7025, it is a dual triode tube that has the highest voltage gain of all preamp tubes, with a mu of 100. Widely used across guitar amplifiers and hi-fi applications.
For less gain, you can replace a 12AX7 with 5751, 12AT7, or a 12AY7
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ANOS Telefunken 12AX7/ECC83
$109.95Ribbed or smooth plate, these are used pulls, but test as new. Call for availability. -
Electro-Harmonix 12AX7
$28.95Balanced sound, ultra low noise and detailed musical tone. *****LIMIT 1*****
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Electro-Harmonix 7025
$27.95The Electro-Harmonix 7025EH has a mid-range that gives clarity and definition to the sound and a smooth top end for warmth and balance. ****LIMIT 2*****
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Mullard CV4004/12AX7
$28.95The CV4004/12AX7 is a low noise valve with a short plate structure for reduced microphonics.
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Ruby 12AX7AC5 HG+
$27.95Sweet, warm tone. Highest grade, lowest noise. Shuguang 12AX7B tested to Ruby specs.
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Ruby 12AX7ACZ HG
$22.95Highest gain 12AX7, great for metal and hard rock. Selected high grade JJ ECC83. -
Ruby 12AX7ACZ HG+
$26.95Highest gain 12AX7, great for metal and hard rock. Selected highest grade JJ ECC83. -
Sovtek 12AX7LPS
$29.95High gain, low noise, smooth sound. Great as a phase inverter. ****LIMIT 1**** (same as Mullard reissue 12AX7.)