“…he sound became more dynamic, and more inner detail starting to reveal itself. On recordings of grand piano the overtones and harmonics were more evident, giving more information to the sound.” Read
“…Sweet sounding and smooth, add to that the extra quiet and sonic focus of vintage Amperex manufacture, and you may never go back to a 12AT7 once you hear these.” Read
“superb lively sounding 12AT7, Bugle Boys have a magical sounding upper midrange”
“Those French made 12AT7 Amperexes are supposed to be some of the best sounding AT7s made” Read
” great sounding sub for 12AU7, low noise, sweet sound, great bass”
“like most RCA tubes does everything well, with a good natural timbre and sense of authority through the whole range, while also open and quiet.” Read
” Much clearer and more musical. Pleasant, well-modulated detail. Possibly a little noisy in the mid-range, but still one of my favorites so far.” Read
“having a wonderful 3D sense of space and it does!! The stage seems larger than
life. The only flaw it might have would be on bright systems it tends
to have a happy high end, but I can live with it”. Read
“Beautiful punch/dynamics, with the leading edge of the Telefunken’s without the “etch”. The body of the harmonic is not quite as full as the long plate Mullard’s/Amperex’s but more body then the Telefunken’s.” Read
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“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.”
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.”
