In Reply to: Let us know what the metric is for "good sound"....nt posted by kuribo on November 13, 2015 at 14:08:46:
And that's even measurable, although it can be at really low levels such that there are measurement difficulties: it is hard to see in all the noise and yet can still cause a problem.
But if you wanted to point at a problem area, that is a classic that's been around for many decades and not really been solved by solid state designers, although tube amp designers seem to fare better. You might see it as the holy grail; build a solid state amp that lacks odd ordered harmonic generation in general and you are on to something.
Honestly, that would represent transformation and it would likely end the market for tubes.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Lack of the 7th harmonic is a good place to start. - Ralph 14:41:17 11/13/15 (47)
- Lots of amps, ss and class d alike, have inaudible 7th harmonic distortion- some like them, some don't..nt - kuribo 14:45:31 11/13/15 (46)
- Don't know of one where its 'inaudible' - Ralph 15:40:03 11/13/15 (45)
- Human hearing does not have infinite sensitivity....There is indeed a measureable level when our ears cease - kuribo 17:34:23 11/13/15 (44)
- That really isn't how it works. - Ralph 17:59:21 11/13/15 (43)
- I'ld love to see a source for that -140dB claim.... - kuribo 19:17:28 11/13/15 (42)
- You really don't seem to get the point and have been quite consistant in that regard for months now. - Ralph 13:51:26 11/14/15 (31)
- I get the point just fine...You can't seem to grasp the fact that there exists a threshold of audibility - kuribo 14:21:26 11/14/15 (30)
- Actually I do get that but when it comes to higher ordered harmonics - Ralph 08:29:39 11/16/15 (27)
- What about "threshold of audibility" can't you understand? The ear CAN'T pick ANYTHING out that's ( T.A. - kuribo 13:03:14 11/16/15 (26)
- That is actually a different topic and phenomena and I have no problem with it. - Ralph 13:25:17 11/16/15 (25)
- Different? How so? You said 7th harmonic matters....I said not if it's inaudible... - kuribo 13:46:11 11/16/15 (23)
- The point is that the 7th is rarely inaudible. - Ralph 14:15:27 11/16/15 (15)
- RE: The point ? When Kuribo weighs in - A.Wayne 15:10:19 11/16/15 (12)
- RE: Hey how about a Shoot out ................ - A.Wayne 15:11:31 11/16/15 (11)
- He doesn't care how they SOUND...(nt) - mkuller 16:33:40 11/16/15 (1)
- How wrong you are...FYI: I don't care how YOU think they sound....nt - kuribo 18:03:34 11/16/15 (0)
- Not interested in subjective opinions....but thanks for the offer...nt - kuribo 15:13:56 11/16/15 (8)
- That's odd- do you only play sine waves when you are at home? nt - Ralph 20:17:56 11/16/15 (3)
- Really? Is that your best shot? nt - kuribo 20:34:16 11/16/15 (2)
- kuribo and Ralph: enough is enough - The Bored 09:28:31 11/17/15 (0)
- No- just a statement of fact. You have to use your ears to hear. nt - Ralph 08:31:25 11/17/15 (0)
- RE: Not interested in subjective opinions....but thanks for the offer...nt - A.Wayne 15:17:07 11/16/15 (3)
- No, we sit around and laugh at all those poo-pooing class d......nt - kuribo 15:26:32 11/16/15 (2)
- Awful lot of laughs for you... - mkuller 16:35:07 11/16/15 (1)
- Get back to me when you have something of substance to add to the discussion...nt - kuribo 18:04:37 11/16/15 (0)
- There, you said it- if you can't hear it, it doesn't matter.... - kuribo 14:50:38 11/16/15 (1)
- Cripes - Ralph 20:14:08 11/16/15 (0)
- Like Curl says in his article... - mkuller 14:15:04 11/16/15 (6)
- He shouldn't have to because most intelligent people understand implicitly - kuribo 14:42:15 11/16/15 (5)
- Then it's obvious... - mkuller 14:47:23 11/16/15 (4)
- Inaudible is inaudible. Do you have some data to share which shows otherwise? Please share....nt - kuribo 14:53:01 11/16/15 (3)
- I did. Read John Curl's article. nt - Ralph 20:19:17 11/16/15 (2)
- Read Bruno Putseys' paper on the use of negative feedback. Read the measurements of ncore... - kuribo 20:39:28 11/16/15 (1)
- You really don't know how this works do you. - Ralph 08:33:02 11/17/15 (0)
- Wow - E-Stat 13:44:54 11/16/15 (0)
- RE: I get the point just fine...You can't seem to grasp the fact that there exists a threshold of audibility - Tony Lauck 18:46:19 11/14/15 (1)
- Do you have any test data on the ncore amps which shows audible harmonic distortion with complex signal input? - kuribo 05:47:44 11/15/15 (0)
- Me too - 13th Duke of Wymbourne 23:41:07 11/13/15 (9)
- Most of what I have read limits single tone audibility to around -80dB max... - kuribo 08:18:04 11/14/15 (1)
- RE: Most of what I have read limits single tone audibility to around -80dB max... - Dave_K 10:17:08 11/14/15 (0)
- RE: Me too - morricab 01:53:03 11/14/15 (6)
- RE: Me too - Inmate51 08:47:01 11/16/15 (0)
- RE: Me too - A.Wayne 03:39:50 11/14/15 (4)
- RE: Me too - morricab 12:47:50 11/14/15 (3)
- RE: Me too - Tony Lauck 14:03:47 11/14/15 (2)
- RE: Me too - A.Wayne 14:26:45 11/14/15 (1)
- RE: Me too - Tony Lauck 18:20:24 11/14/15 (0)