6550 to EL34 Switch
I recently just modded and switched my 1979 2203 Marshall JMP US model with Tung-sol 6550s which I bought on here a few years ago to the JJ E34Ls as I play alot of AC/DC and that's what they used plus EL34s are much cheaper then a 6550s so that help a bit. The tubes sound great to my ears and the amp sounds better with EL34s. The tubes are not to Dark, not to bright. Well rounded and balanced tube when it comes to the highs and lows as well and plenty of play with my controls on the amp now. The L tubes also have a higher voltage rating then a standard EL34 so a better choice when switching from a 6550 which have a higher voltage rating to EL34s. Overall a good tube for a good price! Would buy these again!