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In Reply to: RE: Class ab and class a posted by Tre' on March 29, 2022 at 08:57:23
Some (many?) can be biased so that the first few watts are in class A.
Jack
Follow Ups:
The output devices in a Class A/B amplifier are biased a little bit on. This is to prevent crossover distortion. Because of that there is a time, for the first few watts, that they don't reach cutoff.
That is not Class A operation. Class A operation is much more than just not reaching cutoff.
Again, a Class A/B amplifier operates in what is called Class A/B. Not A then B or A then A/B but A/B. A/B is it's own thing.
The original question should have been, "How many watts can I get from my A/B amplifier before the outputs start to reach cutoff". That would have been a proper question.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
that's paltry and insignificant. You could say that most AB amps do that
or almost one-seventh its rated AB output.
it's a nary heard of Kinergetics KBA 75 and the E bills are climbing a bit more now and will get even worse. Believe it or not my Quad amp with the current dumping is dam close and the current draw is much less.
Again, it depends on how they are biased, as I said in my previous post.
The first few can be quite a few actually. Did you read my other response to the OP?
Jack
and ONLY if you have high efficiency speakers that only need a few watts will it make a difference - you may not even enter AB that way. I know this because I used to have horns. I now live with electrostats and I'm quite happy with them
I am assuming the OP is inquiring about a similar situation.
FWIW, I went from electrostats to horns.
Jack
nice to meet you Jack, I had both for many years but eventually settled down with the love of almost a lifetime, my Uncle's Quad 57's
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