“Low noise version of the 12AX7. These are an excellent step up from the 12AX7”
GE 12ax7 Short Gray Plates
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Category Archives: 12ax7/ECC83
Raytheon 5751 Black Plates Triple Mica
“The strength of this tube is its overall balance. Its got the 5751 sense of focus in spades, is clean, open and evenhanded in frequency response if just a little sweet on top.” Read
“Very sweet, warm vocals. Very open soundstage. With classical, you really feel the vibration of the violin strings. It is very warm and very nice. It really gives a distance sensation.” Read
GE 5751 5 Stars Black Plates
ShuGuang 12AX7
Tung-Sol 5751 Long Gray Plates
“The most liquid of all the tubes, It lets the highs just roll off.” Read
“This has to be the most detailed sound I’ve ever gotten out of the ‘head.” Read
Continue readingTungsram 12ax7 Short Gray Plates
“… I don’t like the clean sound, too much bottom. The rhythm is a lot better, the mid’s a little mushy but not hollow at all…. ” Read
“Tunsgrams are ok, they are most certainly better than any of the new production stuff” Read
Continue readingJJ ECC83S
From one of the stores that sells this tube – “The ECC83S is great tube with a tight low end, a very natural and harmonically complex mid with VERY good definition and a sweet high end that is not brittle.” Read
Sylvania 6681/12ax7 Gray Pinched Plates
“6681 was “mobile rated”, otherwise specs were per 12AX7. Mobile rated meant not only rugged and hardy in the face of repeated on-off cycles, just as stated, but also capable of performing under extreme fluctuations of filament voltage as supplied by Jeep or halftrack battery, etc. under field conditions, I believe the spec called for reliable operation w/in range exceeding 5V to 7.6V on the heater! ” Read
” big, upfront, punchy, with lots of bass.”
RCA 7025 Short Plates
This tube has been specifically designed for Audio applications and has very low noise and microphonics.
“i put in this rca 7025, gave it a couple minutes to warm up, put in some brushfire fairytales and i was like, “damn.” i was pretty much floored at the improvement. ” Read
“Sweet, liquid, musical and responsive. Very dynamic and real sounding.”
