The power amp I went with was an RFTLYS from China. You can check one out on this eBay auction. The guts are point to point and it seemed pretty nice.
The other night I decided that the thing just was missing something....bottom, presence, etc. *So I called Bob and ordered an ST 70. Shoulda done that first.
I had figured I'd sell the RFTLYS on eBay but then I thought I'd hate for the next guy to be disappointed. Now I'm thinking I've set the bias too low. I mostly know guitar amps and I know a too cool bias might make a guitar amp sound "thin".
The company in China suggested 30 mA for the bias. The guy at the local hi-fi shop said 30 mA. Running at 120 volts I have almost exactly 400 volts on the plates. So I set the 4 EL 34s at 29-30 mA. The Weber bias calculator says 38 is avg and 44 is hot. 31 is low. I know this site is referencing guitar amps so it might not even apply. I'm not a tech.
Where would you guys set the bias on this?
*Oh....I pulled the RFTLYS out of the system and re-installed my old Yamaha AVX 100U. It was a world of improvement. That's when I called Bob.
Thanks guys. Can't wait for my new ST 70.