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In Reply to: RE: Since you have a burr under your saddle posted by morricab on February 26, 2025 at 03:12:23:
USERS ARE NOT EVIDENCE!!! A lot of users like Naim amps and some of the other so-called AB amps that exhibit zero crossing distortion. They likely can't hear worth a damn but that is another discussion...
Wait- huh? All people that listen to Naim amps can't hear worth a damn?
Your logic is terribly flawed.
If it is improperly biased and goes into cutoff or non-linear zone then it has zero crossing distortion and is effectively (regardless of mfg. claims) Class B because the bias is too low to keep the devices on through the handoff.
The amps you are talking about are not designed for class B. You seem to be ignoring that simple fact. So yes, when improperly biased (and so operating as a class B amp) they will have a problem. But if the circuit is designed to get around that problem with intention of being a class B circuit then your statement is false.
User feedback is not evidence.
Testimony is indeed evidence. What is is not is proof. You seem to be conflating 'evidence' with 'proof'. Do you see the distinction?
If you wish to be abusive that's on you. I hate to come back with something that might be considered abusive as well but in plain English you don't know what you're talking about. I've worked with amps that were operating class B because of insufficient bias and I can tell you they don't reproduce a sine wave properly. You don't need to have them at super low power- the problem shows up because at zero crossing the amp is low power at that point! Amirim's measurements don't show any evidence of a problem; if there was one the sine waves he showed would have been sufficient. Based on your comments though I fear this will be lost on you.
My recommendation is get an amp on which you can adjust the bias and put a scope on it, then adjust the bias and see what I'm talking about. If there's a problem at the zero crossing its pretty audible and you won't need a super low signal level to see in on the 'scope.
You've still not explained how the EV A-20C, which is a class B amp, can have no zero crossing artifact.
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Follow Ups
- RE: Since you still have a burr under your saddle - Ralph 02/26/2509:46:32 02/26/25 (11)
- RE: Since you still have a burr under your saddle - morricab 01:18:31 03/3/25 (10)
- RE: Since you still have a burr under your saddle - Ralph 10:28:52 03/3/25 (8)
- RE: Since you still have a burr under your saddle - morricab 00:15:22 03/4/25 (7)
- You are objuscating. - Ralph 09:12:51 03/4/25 (6)
- RE: You are objuscating. - morricab 01:41:27 03/5/25 (5)
- Apparently you're not interested in the truth. - Ralph 10:16:31 03/5/25 (4)
- RE: Apparently you're not interested in the truth. - morricab 11:52:33 03/7/25 (3)
- Again, for the 5th time now, what will you consider to be data? - Ralph 10:07:08 03/10/25 (2)
- RE: Again, for the 5th time now, what will you consider to be data? - morricab 10:51:49 03/10/25 (1)
- Data posted at link. - Ralph 10:58:02 03/10/25 (0)
- RE: Since you still have a burr under your saddle - morricab 01:22:59 03/3/25 (0)
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