Do we still need 6550 or KT88 tubes?

77jovian, kt 120 will fit in your ARC vt 100.
I used mine with kt 120 for more than 1000 hours now.
Some days I listen 10 hours without a break.
Sounds good, works perfekt!

77jovian, kt 120 will fit in your ARC vt 100.
I used mine with kt 120 for more than 1000 hours now.
Some days I listen 10 hours without a break.
Sounds good, works perfekt!

Yes, we still need the other tubes. I tried KT120 tubes in my system and they sounded terrible compared to the Gold Lion KT88s. The bass was overpowering, the highs not as extended, the soundstage not as extended in any dimension, they were not as clear... Basically, I thought they sucked.

Lower the bias on the kt120 and they won't be muddy.

08-24-13: Reynolds853
Yes, we still need the other tubes. I tried KT120 tubes in my system and they sounded terrible compared to the Gold Lion KT88s. The bass was overpowering, the highs not as extended, the soundstage not as extended in any dimension, they were not as clear... Basically, I thought they sucked.
Reynolds853 (Threads | Answers | This Thread)

What's the amp? KT120 is NOT a replacement for all KT88/6550 amps so have to be careful.

GL KT88 sounds fantastic and much better than all the 6550 I rolled but NOT reliable. They always take out resistors after blowing. Soldering is simple but got tired removing 45+ screws on a 110#+ mono so back to SS. Winter is coming so looking for amps design for KT120 or KT150. So far I've only heard positive comments from owners and respected designers I've spoken too.