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In Reply to: RE: Considering A Change In Electronics? Any Recommendations? posted by Mister Pig on April 30, 2022 at 10:19:52
Class A single ended? Properly done that topology eliminates all the typical downsides of SS amps and avoids the hassles of finding and replacing tubes.
Even the lower powered PASS amp camp amps have a reputation for being muscular when configured as parallel mono, exactly doubling power from 8 to 4 ohms.
And their listening tests are renowned. I might use a tube preamp with even a Class A single ended SS power amp. But that is for the added harmonics, not harshness when it comes to class a single ended.
Don't wrestle with pigs. You both get dirty and the pig likes it.
Mark Twain
Follow Ups:
Have you tried the Amp Camp Amp's?
At one time I was considering trying one. Mainly because I always wanted to try a Class A on a more long term basis other than having one pass through my hands.
My speakers are 89db but I don't listen to anything loud.
Nelson keeps a scope on the outputs of his amp at his home so he can see exactly if and when clipping might occur while listening in real world scenario.
I plan to do the same soon for a while but probably not permanently. Nothing beats emperical data for informed decision making.
It should be very educational to see when and why it actually happens, if it ever does in my medium sized listening room.
My speakers are either (depending on my mood) Ref3A DeCapo I (90 db)or ELAC DBR Reference (87db), although I will be pulling my HSU powered sub out of storage soon and adding it to the system. Now that the wife is out I can do what the hell I want in the living room :)
I expect I will never see any clipping from my 140 wpc QUAD909, probably never from my 36 wpc Musical Fidelity A1, perhaps very sporadically from the 25 wpc OTL Tube amp. But we will see.
THD is another matter entirely of course. No way I know of to measure that in real time while real world listening unfortunately. But it certainly does increase in most amps with increaded output levels.
Don't wrestle with pigs. You both get dirty and the pig likes it.
Mark Twain
I do own and use both OTL and Class A amps: Transcendent Sound T8-LN 25wpc OTL and Musical Fidelity A1-2008 (class a 36 wpc).
I go back and forth regularly between them. For the mids and highs there is surprisingly little improvement with the OTL (but some).
For the bass: volume not much difference but the A1 is definitely more controlled in bass.
Don't wrestle with pigs. You both get dirty and the pig likes it.
Mark Twain
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