JJ 12AX7 / ECC83 Preamp Vacuum Tubes (Three Pack)

Tubes all tested very good and seem to have great sound but have not had much time yet seriously evaluate. order and shipping very smooth and fast of course.

I just received these tubes in the mail yesterday, and I installed them right away in the preamp section of my Jet City 20w combo amp (JCA2112). The tubes in the amp previously were marked "made in china" and were 12ax7R, which I think must be the same as the ax7s, do to their pretty high gain tendency. I picked the JJ's at the recommendation of the Jet City's product support guy, and based on some positive feedback from fellow musicians. I've only had the tubes in for about 36 hours now, but last night I put them through about 3 hours of gig time and they sounded great. The item description that Amazon provides is really pretty right on- these tubes increase clean headroom nicely. The original stock chinese tubes broke up almost instantly, and while that was fun for heavier rock, I've always been displeased with the lack of clean tones my amp could provide. The JJs changed all that in a hugely noticeable way. I'm reserving my final judgement for a few weeks from now when they've had another 10 hours of playing time, but here's what I've noticed so far: -Great headroom and very musical, lush breakup- not harsh, jagged distortion, but creamy, bluesy drive. -tight lows, very pronounced mids, and a nice, chimey high-end that isn't brittle at all. -The note separation that the increased headroom gives is really great, and even with the preamp gain cranked, lead runs and hammer-on pull-of stuff has a nice, clear quality to it that allows notes to cut through the breakup in a really cool, vintage sounding way. I guess I should also add that while this 3-pack isn't eligible for Prime, I received the package in 3 days and it was very well-protected. I would recommend the JJs, especially if you have an amp that comes stock with chinese tubes. These really do make a difference in tone.

For My Fender Custom Pro Reverb! Absolutely Love New Tubes!

Used for replacing preamp tubes. Works great 3rd tube for a spare

Replaced my Fender Blues Deluxe reissue amplifier pwr tubes with jj 6l6's A very noticeable difference. So I decided to replace my preamp tubes with these even though I don't think they were faulty. Even more noticeable difference. Worth it. 😛🤟

Nice! Sweet sound

Buena calidad al mejor precio

Purchased a Little Bear phono preamp. With it I purchased some Russian 12AX7-LPS tubes to replace the cheap Chinese tubes it comes with. I fired it up and immediately noticed a significant hum and lack of sound quality in a few areas. After playing music for 30 minutes (to give the tubes time to warm up fully) the hum was less, but I was still noticing a lack of low end punch. Bass was weak and drums were practically missing from the music. I gave them another 30 minutes before I decided that something had to be changed. After some searching around I found these tubes. They came very quickly which was great. Upon installation and without any warm-up, I immediately noticed a more full and realistic sound. 2 albums later I'm sitting on my couch, lights off, eyes closed and just enjoying the wonderful sounds coming from my speakers. Occasionally I sneak a peak at the soft glow of the tubes. These tubes made a world of difference. I don't feel like anything is missing. The hum is gone too.