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In Reply to: RE: I think Nelson Pass would disagree posted by Tre' on February 3, 2022 at 08:01:07:
That's because the designer isn't intending to produce a whole lot of power in class A mode -- class A mode simply means that the amp is producing only the power output possible below the bias setting. A class A/B amp is a class A amp while operating under these conditions; when the power spikes above that limit, it operates in class B mode. This transition happens seamlessly and continually.Or as Pass says, "Push-pull amplifiers generally operate in Class A mode up to a point where the output current is twice the value of the bias current. In the Class A region, both halves of the circuit share the signal simultaneously. Beyond that the signal is handled solely by the push (+) half of the amplifier or the pull (-) half."
So, e.g. the Pass X150.5 amp that I owned for several years puts out 16 wpc into 8 ohms in class A mode according to Pass.
NOT the 51st state, eh!?!
Edits: 02/03/22 02/03/22 02/03/22 02/03/22
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Follow Ups
- Sure, A/B amp usually have lower bias settings - Feanor 09:57:46 02/03/22 (4)
- RE: Sure, A/B amp usually have lower bias settings - Tre' 07:27:41 02/04/22 (3)
- RE: Sure, A/B amp usually have lower bias settings - LtMandella 08:18:12 02/05/22 (0)
- RE: Sure, A/B amp usually have lower bias settings - Davey 08:53:42 02/04/22 (1)
- Thank you. nt - Tre' 10:21:55 02/04/22 (0)