Power amplifiers with selector Class of operation?

Have made our Olympia Series of amplifiers with a Low Bias / High Bias switch for years.  https://pbnaudio.com/eb-sa-amplifiers/

Good Listening

Peter

roberjerman, whether you think so, or not, speaker switching, brings the speaker output wiring, to the front, and then, back, to the rear of the amplifier, and, this, limits current, affects damping, and can only add / pick up noise. In your very large museum of power amplifiers, name me one American made power amplifier, that offers speaker switching. Bel, GAS, or whatever. When Adcom decided to eliminate the speaker switching, from the GFA 535, to the series II, this was an enormous upgrade ( other things, positive, changed, as well ). I can only imagine a Krell, Threshold or Levinson power amp ( of which I have owned many ) having speaker switching. Just use a 2nd amp, for a 2nd pair of speakers, or, change the speaker cables, manually, to the other pair. I find many statements of yours, ridiculous. But hey, we all have our opinions....Enjoy ! MrD.

Emotiva mono blocks have this feature. 

cosmicjazz

Power amplifiers with selector Class of operation?

You want some like this, pity it isn’t made any more. 3w 10w 30w 100w of Class-A bias
https://ibb.co/0jZyD4Q

Next best is the Gryphon Antileon Evo. low, med, high Class-A bias
https://ibb.co/3CksBT7

And yes the Parasound John Curl designed Halo JC1 monoblock are great 10w or 25w switchable

Cheers George

I have a late 70’s Yamaha B-4 that allows switching between ‘A’ and ‘A/B’. The only discernible difference I can sense is about 50 extra degree of heat. Great sounding amp though.