COOCHEER Blues Jr. / Pro Jr. JJ Tube Upgrade Kit (2x EL84, 3x 12AX7)

I popped these into my amp and noticed an immediate difference. The gain from my amp, my overdrive pedals, and my fuzz pedal were super cleaned up and sounded awesome. That said, these seem to be either warmer tubes or "not as high gain" as the original Groove Tubes - which for me was a happy accident. They sound AMAZING! The much needed warmth that the previous tubes didn't have. By the way, get your tubes from Tonal Tubes! They match the tubes for you and ship extremely fast.

That sound is back, you know what I'm talking about. That sound that just pulls the notes right out of your soul. Great set of tubes. Checked them on my tube tester before installation and biasing and they tested as expected.

Excelente producto, llegó rápido y excelente precio

they worked well when I put them in then after a couple of months I had what sounded like a 60 cycle hum I could not figure out where from so i put it into a guitar amp repair shop where they have all the test equipment the tech found a bad tube and advised I change them all I did an it still works great this solved the hum problem

I have a Fender Blues JR. Started cutting in and out with loud crunchy pops like someone was unplugging my guitar while hot. It would heat up and play OK for a few minutes, then fade or cut out completely or make the loud crunchy pops again. I've owned the amp for 10 years or so so I looked for the highest rated tubes on Amazon and they fixed the issue. I would swear it sounds better than when it was new but no way of really knowing. I did not replace just one or two, I replaced them as a matched set and threw away the old. Simple install, but do it safely and carefully. There are videos that explain it well.