I also have those options on my tube amplifier. In addition to output tube types, and variable feedback/damping. I view it as a wonderful opportunity to explore my personal preferences. Other than the fact that the output tap used will likely be more driven by the impedance of the speaker across the frequency range.
Tube Amp settings: Triode vs UL; 8 ohm vs. 4 ohm ?
Hi. Advice please. EL-84 tubes. Cary Rocket 88 tube Amp. Klipsch Forte 8 ohm speakers.
I can Triode Class A this amp, or A/B it on UL?
I also am blessed with switches for Ohm: 4 or 8?
Speakers efficiency is upper 90’s db
What is the decision process for settings?