Ok, I have gotten around to re-biasing the amp. Just backed off one set of tubes until the led just went out. Raised the other pair until the led went on then backed off until it just went out.
And having primarily played three basses through the amp, I find it interesting how different the tones are with each. My Gibson Midtown is quite polite, but also quite boomy - a mudbucker at the neck will make it boomy. The Thunderbird (currently tuned DGCF) sounds more aggressive (as you might expect). But the Jack Casady really blows me away. It is really aggressive through this amp, even with impedance set to 50.
For signal path: bass-> hotwax (hot tubes side on with drive about 10:00 and blend about 10:00, so mostly clean) -> Bass Preacher (compression 10:00, but makeup gain about 2:00) -> Amp
Although I have seen the same difference with SS amps (most recently SB-200), the differences are much greater through this amp.
And having primarily played three basses through the amp, I find it interesting how different the tones are with each. My Gibson Midtown is quite polite, but also quite boomy - a mudbucker at the neck will make it boomy. The Thunderbird (currently tuned DGCF) sounds more aggressive (as you might expect). But the Jack Casady really blows me away. It is really aggressive through this amp, even with impedance set to 50.
For signal path: bass-> hotwax (hot tubes side on with drive about 10:00 and blend about 10:00, so mostly clean) -> Bass Preacher (compression 10:00, but makeup gain about 2:00) -> Amp
Although I have seen the same difference with SS amps (most recently SB-200), the differences are much greater through this amp.
The overdriven sound on the Rotosound clip comes from the yba100 preamp ?