Head-Fi.org › Forums › Equipment Forums › Cables, Power, Tweaks, Speakers, Accessories (DBT-Free Forum) › My UPS has a THD of 80%. How much, if at all, will this mess up my headphone amp's cleanliness?
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My UPS has a THD of 80%. How much, if at all, will this mess up my headphone amp's cleanliness?

post #1 of 8
Thread Starter 

Not all the way to 80%.  That was from memory.  It actually says:

"WARNING: DEVICE OUTPUT NOT SINUSOIDAL.  THD 63% SINGLE HARMONIC DISTORTION 52%"

 

Will this affect my audio?


Edited by PelPix - 7/18/12 at 7:23pm
post #2 of 8
Got any more info on the device, like a model # and so on?

That looks nasty at first glance.
post #3 of 8

computer UPS's should only be used with SMPS's because they don't output a sinusoidal waveform. Magic smoke is a possibility.


Edited by leeperry - 7/21/12 at 6:42am
post #4 of 8
Quote:
Originally Posted by leeperry View Post

Magic smoke is a possibility.

You read my mind. redface.gif
post #5 of 8
That sounds awfully high if true. I use a PS Audio P5 Regenerator and it says the input on the line is about 2.1% THD and that it's fixing it and outputting 0.3% THD. I can't speak to the accuracy of those readings but I do seem to find it improves things.

If you are showing 52-63% THD, I can't imagine that would sound good but perhaps you could call the manufacturer and ask them. Either way it sounds like it's broken.
post #6 of 8
Thread Starter 
Quote:
Originally Posted by IPodPJ View Post

That sounds awfully high if true. I use a PS Audio P5 Regenerator and it says the input on the line is about 2.1% THD and that it's fixing it and outputting 0.3% THD. I can't speak to the accuracy of those readings but I do seem to find it improves things.
If you are showing 52-63% THD, I can't imagine that would sound good but perhaps you could call the manufacturer and ask them. Either way it sounds like it's broken.

 

It's not broken.  What I'm talking about aren't measurements.  It says these things on a sticker on the bottom of the UPS.  This is by design.

post #7 of 8
Quote:
Originally Posted by PelPix View Post

 

It's not broken.  What I'm talking about aren't measurements.  It says these things on a sticker on the bottom of the UPS.  This is by design.

 

Oh, then if that's intentional you'd definitely want to call the manufacturer, though I don't know what kind of answer they'd give you since I doubt they would have any frame of reference for what we decide is high quality audio, and since they probably wouldn't know much about the electronics in your gear.

post #8 of 8
This UPS sounds like it's designed to drive something that's heavily filtered or otherwise alright with a non-sinusoidal output, like an SMPS. An unregulated linear PSU that you'd find in a lot of audio equipment would probably be less than pleased to receive this UPS as a gift.
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