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In Reply to: RE: 2a3 is a very good idea posted by SETdude on March 09, 2016 at 12:47:39
Actual do enjoy tube rolling, kind of what got me into tube equipment in the first place, kind of amazing to me how you can vary the sound. The Dennis Had Inspire amps look really nice, there is one (that I saw) up on the auction site. As far as 2a3 amps go, any commercial makers give you the option of running 2a3 or 45 in the same amp? I know the voltages are different, so there would have to be a jumper or something to change it, but it seems like a cool option if available!
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Dennis does build 2A3 and 45 amps. So far I'm resisting. The pentode amps are simply excellent. I also bought a 27 tube triode preamp that is dead quiet and very affordable.
Fi Audio (Don Garber) in Brooklyn offers 2A3/45 stereo and mono amps, with just a change in the rectifier. But the wait time is very long. No better deal around.
Mine have a switch for 45 vs 2A3.
For my 95db Straight 8s, I preferred a 300B amp. The 2A3 just didn't quite have enough gas in a larger room and the 45s really need speakers that are up in the 100+db range to do them justice.
-Rod
This is important. Big room...you may need more sensitive speakers
So is the kind of music. If your music pretty much all sounds like "I don't want to be a hero", you will be OK.
The more complex the music, and/or with dynamic peaks, the more sensitive the speakers you need.
Easy to drive (high impedance) speakers can also trump some sensitivity.
I agree with Rod. You really need the right speakers for flea power to shine.
Maybe this is sacrilegious but I've supplemented my SETup with 2x10" powered subs. Maybe I'm lucky but they seamlessly integrated. Before I did this I listened mainly to bebop and acoustic music, mainly blues everything else that needed a bit more power was flat with poor dynamics. Now everything is enjoyable, a bass guitar actually sounds and feels like one. Especially my live recordings have seen a fantastic improvement.
I have to somewhat agree. I had the Tekton M-Lore for about a year and the 95db efficiency rating might be a tad optimistic. Ran it with a P-P 40 watter with excellent results. Your 300B suggestion would be as low in power as I would go ( roughly 8-10 watts) for reasonable SPL's.
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