new tung sol kt 120

I run Sonic Frontiers SFM-160s, which use four KT-88/6550s per amp to produce 160w. My current situation has Gold Lions in the amps. Great sound.

I exchanged e-mails with Chris Johnson re: the KT-120s. While an increase in power of about 10% is common in SF gear (which of course was not designed to take full advantage of the KT-120s), Chris felt the major benefit in his equipment was the LT reliability. The SFM-160s really push the four KT-88s hard and I do have tubes go a bit more often than I would like. With the KT-120s, the LT reliability issue is much better.

I have not tried this, as I recently re-tubed with matched quads of Gold Lions. Plus, I am very happy with the sound.

From my understanding, the tubes are only recently available on a large scale. Chris J just started to carrying them.

Casouza,

Help me better understand "self-bias/cathode bias".

My Sonic Frontiers monoblocks use four KT-88s per amp. I have a knob on the amp that allows me to select one of these four tubes. Using a screw driver, I can turn a shaft with a slot in it to adjust the bias using a meter.

Is this a fixed bias amp?

Thank you.