Classic Euro type with medium to high gain and a linear frequency response. Very clear even tone with good bass character. This is the standard tube that was used in Marshall amplifiers and Vox amplifiers. For those that change first stage gain preamp tubes to change the taste and character of their amps (remember, this can be done in less than a minute without tools, adjustments, or a 'tech'). This is one tube that should be in your basic toolbox. The basic tube sets generally are the 12AX7C, ECC83, and 7025 to cover a wide range of styles and tastes for most amplifiers.
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Went in to buy Tung Sol 12ax7's for my Traynor YCV50Blue, to replace the Sovtek 12AX7MA's that were init, but they had none in stock.
Tried these Groove Tube ECC83S's on recommendation from L&M, and boy am I ever happy I did!
I put the ECC83S's in the V1, V2 and V3 sockets, and Groove Tube EL34MD (med) in the power section. That amp RAWKS!
Gain is smooth and articulate. Clean sound is very balanced. In both clean and distorted, it tightened up the bass, which was a bit muddy before. Amazing tone through the mids and highs as well. I couldn't be happier.
Posted by sean on Mar 12, 2016
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