See a recurring spike at the zero crossing? No? Then there's no crossover distortion.
That much is manifest. But I'm a little confused, because that certainly does not address every aspect of the question I raised, and you made it seem that it does.
For those who have not designed amps or read Douglas Self, this post has a very simple picture showing what crossover distortion might look like: https://www.audiosciencereview.com/...f-benchmark-ahb2-amp.7628/page-93#post-422631
HTH - Don
difference in "phase rotation up to the ultra-high range" between Class-A, -AB and -D, even though I am afraid that I would not be able to fully follow and understand your technical and enginnering details.
I trust my ears. Being a human, I realize my brain lies constantly so my perceptions need to be checked.
Marketing.
You need to check transition point calculated from idle current and load impedance. This is the level where to seek for crossover distortion, not at the zero crossing. More later.
What you see in the time domain (residual) plots will be a spike or non-sinusoidal bump that's correlated with the signal. At zero crossing is the classic Class B crossover distortion, but still, if the residual shows no periodic discontinuity correlating with signal, the crossover distortion is either zero or totally buried (and thus insignificant).This is a typical example of the amplifier with highly pronounced crossover distortion, 4ohm load. See the transition from class A to class AB at some 15mV. This behaviour may not be so much noticeable in better designs, however very often we are able to find the transition point. The crossover distortion at exact "zero crossing" as mentioned by @SIY happens only in class B (zero idle current).
One would not reveal this from typical review plots. They start about 0.1V output voltage and measure THD+N. A lot is buried in noise or the plot starts at too high level.
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How do your ears bypass your brain?
You are always so subjective! And you are not answering my cordial inquiry...
Since the horns I drive it with have a efficiency of 107dB/1w, there is a virtual magnifying glass on the low level behavior of the amp. I heard crossover distortion artifacts with the previous amp, so I wanted to eliminate all potential for this type of distortion. Since the horns/compression drivers are so efficient, I only needed very low power, so the fact that this amp only has 2.5 watts is more than enough. Also, since it has such low power, there is a safety factor for the diaphragms of the compression driver, and the amp emits little heat due to the low power.What do you think you gain with a Class A Amp? I used one on the tweaters of a tri amp system and then one summer tried a Neurochtome amp to save on AC and besides being cooler , smaller, and quieter I could not tell any difference so I stuck with the AB amp.
Its called sarcasm. Sometimes people do that.Strange. If you didn't want anyone to ask you to prove the claim, why did you come here and wave it in everyone's face?
Ok makes sense. The Neurochrome amps have something like 220 dB of gain and 200 dB of feedback, exact opposite approach but both work.... Part of what makes this hobby interesting.Since the horns I drive it with have a efficiency of 107dB/1w, there is a virtual magnifying glass on the low level behavior of the amp. I heard crossover distortion artifacts with the previous amp, so I wanted to eliminate all potential for this type of distortion. Since the horns/compression drivers are so efficient, I only needed very low power, so the fact that this amp only has 2.5 watts is more than enough. Also, since it has such low power, there is a safety factor for the diaphragms of the compression driver, and the amp emits little heat due to the low power.
Since the horns I drive it with have a efficiency of 107dB/1w, there is a virtual magnifying glass on the low level behavior of the amp. I heard crossover distortion artifacts with the previous amp, so I wanted to eliminate all potential for this type of distortion. Since the horns/compression drivers are so efficient, I only needed very low power, so the fact that this amp only has 2.5 watts is more than enough. Also, since it has such low power, there is a safety factor for the diaphragms of the compression driver, and the amp emits little heat due to the low power.