Preferred Series 7025 / 12AX7

Wanted to let you know my thoughts after comparing the stock preamp tubes in my Peavey Rock Master (unlabeled) with the Preferred Series 7025's I recently bought from you. I switched back & forth several times, using the same amp & guitar settings, listening carefully for differences. I mainly used the clean channel turned up to where it distorted, and alternated between the guitar's volume knob being maxed, then backed off until it cleaned up. I used mostly open chords and slow, simple solo lines.

Although the tubes that were in there don't suck, I do like the new ones better. My initial reaction was that they're brighter, but it's not quite that simple. With the neck pickup selected, when strumming an open E chord, the old tubes actually have a more boomy sound, with the low E and A strings dominating the sound, covering up the high B and E strings a bit. When alternating between the low E, A & D strings, it sounded a little fuzzy & undefined, with a bit of a "grind" (this is on the clean channel, keep in mind). The new tubes allow the higher notes to really ring out on the open chords, but the low notes are still full sounding. The lows don't quite drone as much (which some may want), but they sound a bit tighter---more controlled, and without the grind. These tubes overdrive just as soon, but they do it more "gracefully".

With individual notes picked, especially higher notes, this is where it's somewhat surprising. Although open chords sound brighter, solo lines sound warmer. With the old tubes, notes on the higher strings sound more brittle and tinny---especially on the G & B strings. There's a harshness that's hard to describe. With the new tubes, they sound bright but smooth---cleaner & "quieter", if you will. It's kind of a paradox that they they're both brighter and less brittle & harsh at the same time. The differences translate into the high gain channels, but I wanted to use the clean channel as a starting point, since it's less likely to cover things up.

Together with the TAD 6L6WGC-STR's, it has made a difference for the better. ALSO, the mod that Jerry Pinnelli at FJA Mods did on my preamp is PHENOMENAL sounding---more along the lines of a modded Marshall JCM800 now. The new tubes really go well with the mod, and give me the sound I was looking for.

I recently did a tube overhaul on my Marshall Haze 40 combo. What a difference these tubes make!! This amp has always been to muddy for my liking, with the stock Marshall tubes and JJ's. Now, the amp is much more alive -- tight bottom, Marshall growl, and clean, crisp highs. I changed both the pre-amp and power tubes with the Premium Pkg of SED Winged C EL34 and Preferred Series 7025... definitely worth every penny!! Thanks!

I put the Preferred Series 7025 / 12AX7 in an old Supro T bolt. The only preamp tube that has sounded good previously is the old RCA
12AX7. The PS-7025 was a relief. They have good power, good harmonics, tone and sound very close to the original. They also add a little punch w/o tone loss. I very was happy with them.

Thx
James

Excellent tube. I changed my Jan-GE tube for this one on a Mic Preamp, the result....Incredible, the vocals sounded bigger, warmer with a lot more definition and clarity. Every little sound was captured by my mic when this baby starts to work... My experience - it became a total different preamp sound for the better of course...

I have a Blackstar HT-60 Stage and one of the preamp tubes went BADLY microphonic so I needed a replacement! I'm really glad I didn't buy the normal Chinese garbage that comes with the amp and I decided to spend the little extra cash! Like others said it REALLY tightens up the sound and gives is an almost "brighter" sound.. but honestly i think that's most likely because it tightened up the sound so much it seems cleaner! Not much i can say against them installed simple enough and sound great!