Aric
Numerous very established/highly respected SET manufacturers has written the same regarding DC versus AC heating. You are definitely on the right track in your findings/conclusions. Some believe that the 45, 50 and 2A3 ’may’ successfully allow AC heating (withoutt hum issues) but is more difficult with the higher powered 300b tube. Many listeners agree with you, poorly implemented DC heating can sound lifeless relative to AC heating.
BTW I agree with your comments regarding the availability of efficient easy to drive speakers. A friend of mine recently acquired a world class level 2A3 SET. He is very pleasantly impressed by the many good options in the Hiigh End marketplace for these types of speakers.
Charles
Numerous very established/highly respected SET manufacturers has written the same regarding DC versus AC heating. You are definitely on the right track in your findings/conclusions. Some believe that the 45, 50 and 2A3 ’may’ successfully allow AC heating (withoutt hum issues) but is more difficult with the higher powered 300b tube. Many listeners agree with you, poorly implemented DC heating can sound lifeless relative to AC heating.
BTW I agree with your comments regarding the availability of efficient easy to drive speakers. A friend of mine recently acquired a world class level 2A3 SET. He is very pleasantly impressed by the many good options in the Hiigh End marketplace for these types of speakers.
Charles