JJ Electronics Amplifier Tube (T-6V6-S-JJ-MP)

When I ordered my Super Champ X2 about a year or two so ago, it sounded good, but the preamp tube was causing terrible rattling noises when I played notes on the low E string on the first, second and third frets. It sort of dampered my enjoyment of the amp even though I used it a good bit, but when I got these tubes along with a 12ax7 preamp from JJ Electronics, the Super Champ X2 seemed like to be whole new beast. I switched the tubes and biased them, so 20 volts were going through each of these JJ tubes since the stock tubes were running cold. The minute I plugged in my guitar, turned the amp on and started playing, I fell in love. The sound was the signature Fender clean I heard in my favorite tracks, and the sound was infinitely better than how it was before. The rattle was gone, the tubes ran hotter and the amp sounded bigger and better than it used to. I expected maybe a slight change and improvement from changing the stock tubes and biasing the amp, but the improvement was miles ahead of what I even imagined. Its helped my love of playing guitar to grow. I firmly believe that what helps people keep playing is a great sound and these tubes offer that improvement to your tone if youre looking to replace old tubes. I highly recommend these.

Works great. Not much else to say.

[Used in a Ceriatone Dumble Overdrive Special style amp substituting for 6V6gt.] Outstanding cleans: nice crisp highs and a bit more bass than I heard with my old-stock (other brand) 6v6gt tubes which had plenty of life left in them... just chalk it up to design differences? The new JJ tubes even have more clean headroom and theyre a little quieter at high volume = more on the top and bottom! That surprised me! The trans-conductance matching was perfect (confirmed on my own tube tester and in-circuit) and this let me dial the bias in right where I wanted it. This matching is especially important to avoid clipping from a tube that is out-of-range, otherwise youll compromise your bias setting with one tube too high and the other low. I set these quite a bit colder (19.5mv) than the prior set (straddling @ 24mv) but they JJs showed no signs of clipping on the oscilloscope and were pleasing to my ear. Note that these JJ 6v6s tubes are physically larger (longer/taller) than typical 6v6gt tubes by about 1 (2.2cm). For most it wont be a problem but if youve *very* tight clearances in your amp chassis it might be an issue so please be aware. Id rate this tube set + matching service six stars, if I could. Im tempted to buy a spare set now just to put them aside for the future.

these are hot tubes. 14watts.

I replaced the tubes in my Tweaker a few months back but everything I tried was microphonic and extremely noisy. Then I did some research. I have an early model Tweaker which runs a lot of current through its power tubes. Bruce Egnater himself recommended JJ 6v6s for reliability, and I can understand why. As soon as I put these in my problems disappeared.

They arrived quickly and were just what I needed to fix my Vibro King amp. Theyre good quality and a great value. Thanks!

Over priced.

Very good sound. Less microphonic than some NOS tubes.

Garbage. Stopped working.

These were given to me as a gift from a trusted fellow guitarist. It was a brand new matched pair and they kept blowing fuses (3 in a row) in my amp (Fender Excelsior, fixed bias). I put back my old Tung Sol 6V6’s, the problem went away. Brand new tubes and they already had a major short? Seems like a case of really poor QC. From what I hear these give more headroom than Tung Sols, but I couldn’t even get them to warm up.