JJ Electronics T-6L6GC-JJ Amplifier Tube

I was looking to buy Groove Tubes from Sweetwater but a rep told me they would not be back in stock until late July, so I decided to try these JJs.I put them in my trusty Peavey Ultra Plus and they put out impressive tone plus I barely had to adjust my EQ to keep the sound I like.I'm aware you're supposed to have the amp biased after replacing tubes but I decided to jam without doing so since the amp had the same 6L6GC type before. So far, so good with several hours of use.Overall, these tubes are quite impressive and offer good value as other brands may be $40 more expensive. I didn't rate longevity of course because the tubes haven't been used and abused for very long yet, so if I remember I'll update this review in several months.As a side note, I also replaced the ceramic fuses in the amp. If you need help with fuse replacement on the Ultra Plus check out channel "drew p" on YouTube.

Prior to installing these I had a quad set of grade 4 groove tube 6L6 tubes in my amp with 4 tungsol 12ax7 preamp tubes. I have a Peavey JSX 120 watt head. It was a signature Joe Satriani amp. Comparing these to what I had... These have better mids and low mids. And the gain! Oh damn the gain got tighter... And smoother. The amp gained thickness... Honestly I used to have to always have the trebs up to around 8, mids around 6 and the lows maxed to get the tone i liked. The highs are similar, I did not notice a huge difference. But it did create a much bigger thicker tone. I was able to back off a bit on the lows and the mids are just rich/better. I would definitely recommend these if you have gain that is broken up or just not as smooth as you'd prefer.

Set of Tubes arrived promptly well packaged, great service

it did well but I needed a matching set

Fit perfect and works perfectly would buy these next time again

Terrible. Only 2 of 4 were in the box and the ones the ones that did had the glass tubes rattling around in the bos with very little packaging.

I love these JJ tubes and have used them in all my tube amplifiers. Definitely a must have if you have an amp with 6L6 tubes!!

JJ tubes have a good reputation for quality, and it is well deserved. I used these to replace JJ KT77s in a Mesa/Boogie Stereo 50 poweramp, and I couldn't be happier. The KT&&s have a ratty, higher gain, higher distortion sound, better suited for hard rock, metal, etc. Even using an SMS preamp and a Hermida Zendrive, I couldn't take the edge off. Installing the 6l6GC tubes gave my rack the smooth, round glassiness I was looking for, with only a minimal drop in output.Obviously, time will tell whether they hold up to use, but the JJ reputation for solid, durable construction leaves me without any worries.Definitely recommended!