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You are missing my point

Most Class AB amplifiers are bias low. So low as to be in the non-linear cutoff region at idle. Even though there is some power while both devices are conducting all the time, that power can not be considered Class A power. A device biased that low is not "operating in the most linear part of the operating curve".

If there is a Class AB amp that is biased high and does have some operation (or even a lot) where the devices are both conducting all the time and not dipping into the non-linear cutoff region, then that is closer to Class A but again, the devices in a Class A design are biased in the middle of the *most linear* part of the operating curve (for the device choose). The devices in a Class AB amplifier are not.

If the KSA-250 can output 250 watts but only 28.5 watts with the devices conducting all the time then it is a Class AB amplifier and it is biased as a Class AB amplifier (lower than the mid point between cutoff and saturation) and regardless of what the review says, none of it's power is true Class A power.

None of what I am saying is hard to understand. Class A amplifiers produce Class A power. Class AB amplifiers produce Class AB power.

Class A biased devices are idling at half the max current, Class AB biased devices are idling at something less than half the max current.

Tre'

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