Electro-Harmonix 12AX7 Gold Pin Preamp Vacuum Tube
The 12AX7 Gold Pin is the Gold Plated version which offers a substantially better contact with the socket. The 12AX7EH provides high gain with ultra low noise and a detailed - musical tone that rivals the most desirable NOS types. Unique spiral filament eliminates that filament-to-cathode induced hum common on AC-powered amps. This tube can be used in phase inverters / preamp sections / driver sections - It really does well in all applications.
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These tubes have a fairly solid output and a nice mid boost, making them by far the best choice for Marshall style amps.
The downside is they aren't the quietest tubes out there, but by no means is the noise terrible.
reviewed by: Best current preamp tubes for Marshall style amps
I replaced some Svetlana 12AX7s that had gone bad in my Herron VTPH-2 phonostage with the EH gold pin tubes, and they sound great. Very revealing and quiet in the full range. Rich bass and mids, smooth in the high end. Great detail throughout.
reviewed by: Dean Wette
I retubed a Diamond Hammersmith with Gold PIn 12Ax7s and EH 6CA7s. Previously loaded with Sovtek LPS and Tungsol 12Ax7s with Wing=C= 34 power section, the new result is a more defined low-mid range and smoother highs. Chewy but very detailed.
reviewed by: Max R.