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Class D Switching Power Amplifiers and Power D/A conversion

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Old 16th November 2012, 10:12 AM   #5451
fas42 is offline fas42  Australia
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So did the better amp sound less muddy, did one amp have a "sharper" tone to it, for want of a better word? What words would you use to describe the difference?

Frank
 
Old 16th November 2012, 11:05 AM   #5452
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I have done that test in my system, and I could hear a difference. Listening to music that way is really strange... I XO at 200 Hz with fairly steep crossover slope. The bass sounds anything but "fast" and precise.... is all very muddy.
I believe all, in the basses, lie on damping differences. As well as harmonic distortions stays low level enough.
 
Old 16th November 2012, 11:14 AM   #5453
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So did the better amp sound less muddy, did one amp have a "sharper" tone to it, for want of a better word? What words would you use to describe the difference?

Frank
Yes - the better amp sounded less muddy, that's a good way to describe it! There was also better "punch" in bass drum, even though the upper harmonics was absent.
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Old 16th November 2012, 11:30 AM   #5454
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Yes - the better amp sounded less muddy, that's a good way to describe it! There was also better "punch" in bass drum, even though the upper harmonics was absent.
Did the power supply was the same ?
 
Old 16th November 2012, 11:39 AM   #5455
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No. I had UcD 400's with SMPS400A400 and changed to NC400 with the SMPS600. But in a way you can say it the same PSU, since both are SMPS and designed by Hypex.
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Old 16th November 2012, 11:58 AM   #5456
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No. I had UcD 400's with SMPS400A400 and changed to NC400 with the SMPS600. But in a way you can say it the same PSU, since both are SMPS and designed by Hypex.
I think manufacturer has few to do in the matter, but power reserve of the PSU a lot !
I mean, you can transform any amp with the filtering caps etc...
On my amp (2X 140W class AB), i tried a lot of transformers on my PSU. 1000VA was the point where no more improvements by increasing-it. I would double the PSU power vs any amp power consumption.
 
Old 16th November 2012, 12:04 PM   #5457
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Well, I never go beyond 20W output, so in theory a 40W supply should suffice ....
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Old 16th November 2012, 12:28 PM   #5458
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Well, I never go beyond 20W output, so in theory a 40W supply should suffice ....
Peak ? During transients ?
I believe-you, i just try to understand...
(Of course you are sure not to be under the effect "Last baby is the best" ?)

Last edited by Esperado; 16th November 2012 at 12:31 PM.
 
Old 16th November 2012, 01:23 PM   #5459
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Peak output.

That only happens when I do demos and want to produce pants flapping low bass with Yello or similar music. With "normal" music however, I never see power levels above 1W peak.
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Old 16th November 2012, 01:35 PM   #5460
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Guys,

I'm still considering nCore amps for my main system (especially after a second SMPS400 has failed on me, I only have one left...)

For a price comparison, does anyone have a list of commercial solutions using nCore technology?

Thanks
 

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