My Matchless Chief has a new life. The original tubes-which were also Groove Tubes of the same model were spent. Nine years was way too long-I bought the amp on eBay and thought-my VHT blows this away-now with the new tubes-it's the other way around. What tone! These need changing on a yearly basis if you play out or play a lot.

What can you say-it's not about features-it's about tone....

Plug and play-

I'm going to put as many miles on these as I can-then buy a new set. I'll save the trouble and buy a new set now.....

Expensive-so was the amp

professional musician, recording engineer

rock, blues, jazz, country, what pays

Im not typically an EL34 fan but upon reccomendation I did put these in my Marantz 8b and I am well pleased..I never thought that they would rival the XF2 Ge mullards that were in the amp but not only do they rival them,they slam them into the ground.I just recently purchased another quad them..BTW the JJ E34L is not the same tube.It is similar but different.The harmonic structure of the LS is far and above much better.

Very well constructed and my friend has a quad that going on 5 years old and is still as strong as a bull.

Absolutely!!

all kinds mostly classical and jazz tho.