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Shanti Dual LPS 5V/3A , 5V/1.5A
Shanti Dual LPS 5V/3A , 5V/1.5A
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Old 1st September 2019, 04:20 PM   #431
surrealistix is offline surrealistix  India
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Its September. Any update on USBridge Signature launch?
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Old 2nd September 2019, 06:46 AM   #432
SanjeevM is offline SanjeevM
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Default THD

Quote:
Originally Posted by cdsgames View Post
Amp , not finished


Sound quality of the DAC is subjective but we fallowed what audiophiles have been saying for a long time . No jitter , no asrc , low impedance (lots of electrons on the rails) and of course low noise on each rail .


What is funny , is that most of those hardware improvements (sq) have clearly showed up as improvement in THD ... we jumped from -121 to - 127 (same layout same PSUs)


THD +N is same from 1Khz to 19.5Khz (in fact slightly better at higher frequency since THD improves of course)
I'm afraid it will be hard to find a Power Amp with a matching level of THD. If the amp is inferior, the advantage's of low THD may be lost.
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Old 2nd September 2019, 07:49 AM   #433
cdsgames is offline cdsgames  Canada
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80nV or noise will be lower than most LDOs. However noise is defined in relationship to a bandwith and I never checked noise of LDOs at 0-20Khz


In the end what I have found is that lower noise PSU defnitley shows up in a DAC output. What I suspect is that most filters can even amplify noise at "resonance" and everything is a filter (usually resonance is at higher frequency) including any lenght PCB trace and a capacitor


Yes Revolution will have a earthing nut.
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Old 2nd September 2019, 07:50 AM   #434
cdsgames is offline cdsgames  Canada
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Usbridge Sig /Audiophile SBC is in mass production . We are still waiting for alu boxes.
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Old 2nd September 2019, 07:56 AM   #435
cdsgames is offline cdsgames  Canada
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Quote:
Originally Posted by SanjeevM View Post
I'm afraid it will be hard to find a Power Amp with a matching level of THD. If the amp is inferior, the advantage's of low THD may be lost.



THD and sound quality


I think we know for 50 years that THD is not a measure of sound quality .(if its under a certain level

THD does show if a unit was properly build and engineered .
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Old 2nd September 2019, 12:53 PM   #436
matthiasw is offline matthiasw  Germany
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Quote:
Originally Posted by SanjeevM View Post
If the amp is inferior, the advantage's of low THD may be lost.
Disagree,
the source is more important than the the amp and a better source gives superior performance even when the the downstream components are inferior than the source.

Matt

Last edited by matthiasw; 2nd September 2019 at 12:56 PM.
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Old 2nd September 2019, 03:19 PM   #437
soundcheck is offline soundcheck  Germany
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Quote:
Originally Posted by cdsgames View Post
THD does show if a unit was properly build and engineered
And obviously build quality and sound quality do not have any correlations.

Enjoy.
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Old 2nd September 2019, 05:16 PM   #438
SanjeevM is offline SanjeevM
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Quote:
Originally Posted by cdsgames View Post
THD and sound quality


I think we know for 50 years that THD is not a measure of sound quality .(if its under a certain level

THD does show if a unit was properly build and engineered .
OK, got that.

Does the same logic apply to S/N ratio? I mean, if the Amp has a S/N of 90dB will a 120dB player sound audibly better than a 95dB one ?
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Old 3rd September 2019, 07:51 AM   #439
cdsgames is offline cdsgames  Canada
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Signal to noise simply shows the highest signal in relation to noise floor


It says nothing about SQ. In fact no test will tell you about SQ.


Of course a higher SNR is desirable .
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Old 4th September 2019, 02:37 AM   #440
Nanekiu is offline Nanekiu  Norway
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Will the revolution DAC use usb power for getting a signal/connection to pc/network render, if not then we can use something like the ifi idefender to cut 5v/gnd, and prevent 1 more path to ground.
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