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How to Reduce RFI/EMI for HTPC - Good Article you can learn from - Page 2

post #11 of 12
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Quote:
Originally Posted by retropcdos View Post

Yes the Y and Z Sustain Boards in plasma will cause noise due to HV, reason why you turn down the brightness. Of course a good power conditioner will isolation and filter out that noise and has a transformer for AVR, even the compressor kicking over on the fridge, the reason for the noise is require higher current to start the compressor. Also could be a sign the start capacitor is failing. There are power conditioners that have true spit design to isolate other devices and can handle high current amps, without affecting the sound. Just stay away from Monster. didn't care for design and does affect sound noticeable in a bad way, in most the models I tested..

That soundcard you have, I had one, actually the better Xonar essence STX, it was one of the reason I sold it, was due to hiss and noise at higher volume, I would also hear a low high pitch tone when recording from certain devices. The new Sound card Onkyo SE-300PCIE Wavio, can put the gain all the way up and hear no noticeable hiss when recording. The reason is it's well shield and by stages. Plus use a Cambridge Azur 851C DAC for music listening and is dead quite.
Good post on the first part of first paragraph which I agree. But I have some objection to the use of power conditioners. Not directly related to the hiss / noise but the use of power conditioners hinders sound quality for audio. Also, having higher EMI/RFI causes more hiss/hum but also affects sound quality for audio as well... But I'm sure some nice quality power conditioners will do well with the isolation for this type of thing.

My refrigerator is the cheapest brand / model and got it for cheap, $850 or something. It's Whirlpool?

In response to your second paragraph, I don't want to switch out the card anymore as I have tried various in the past. I've got negative result with the sound quality, once again not related to this topic, but the sound was muddier / less transparent and less open. I have tried DAC's that cost $1000~ 2000 in the past, with negative result. They usually do better job keeping hiss/hum down but you also take hit on the less detail and transparency in the music. They sound blurry, like yours (no pun intended). The only one I will plan to replace this Xonar DX7.1 card is the Creative EMU-0404 USB DAC which is the worlds best DAC ever made, beats DAC's that cost up to $110k. But that's off the subject here. I would not talk about it anymore.


cool.gif


cheez
Edited by CheezCake - 10/22/13 at 9:42am
post #12 of 12
Quote:
Originally Posted by CheezCake View Post

...the Creative EMU-0404 USB DAC which is the worlds best DAC ever made, beats DAC's that cost up to $110k. But that's off the subject here. I would not talk about it anymore.

yeah-right.gif

I'm sorry but that's incredibly funny.
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(21 items)
 
 
CPUMotherboardGraphicsRAM
Intel 2500k ASUS Sabertooth Z77 EVGA GTX 670 FTW G.Skill Ripjaws 8GB (2x4GB) DDR3 1600 
Hard DriveHard DriveHard DriveCooling
Samsung F3 1TB Crucial C300 128GB Corsair Force GT 60GB Noctua NH-U12P 
OSOSMonitorMonitor
Windows 8.1 Professional x64 Apple OS X Mavericks HP ZR24w LG IPS226V 
KeyboardPowerCaseMouse
Razer BlackWidow Seasonic X750 Lian-Li PC-A05B Logitech M500 
Mouse PadAudioAudioAudio
Mionix Propus 380 Zero USB DAC (2009 Version) Emotiva Pro airmotiv 4 Beyerdynamic DT990 600ohm 
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Shure SRH-840 
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