high-profile ABX test of ethernet cables Reply #25 – 2015-08-07 15:57:57 Quote from: Arnold B. Krueger on 2015-08-07 08:51:33Quote from: theriverlethe on 2015-08-06 21:01:04Quote from: Arnold B. Krueger on 2015-08-06 16:36:19Quote from: Wombat on 2015-08-05 21:26:05Just to report things i did read lately about this stuff. Seems like the golden ear brigade agrees on that the ethernet cable is always clearly disturbing the sound of any audio gear nearby. Of course no one knows yet what to measure but it must be some packet noise or alike more than -160dB down.I even learned that the 8kHz packet noise Archimago measured at his blog with USB proves exactly this because ethernet uses also packets!If you want to learn from the thread i have this revolutionary knowledge from just look at the usual place I have a number of USB DACs where SNR measurements detect 8 KHz packet noise.Interestingly enough some of them can be "cured" by optimizing the connection from the analog output of the DAC to the rest of the system.Those don't sound like very good DAC's. What kind of noise floor are we talking about?Well over 100 dB below FS.QuoteDo you mean a cable "upgrade?"The DACs I'm talking about have RCA jack unbalanced outputs. My test equipment has TRS or XLR balanced inputs. There are a number of different ways to make an unbalanced to balanced adapter, and some work better than others in terms of rejecting the usual hash that seems to surround USB converters.So, the DAC is passing the USB noise without affecting the DAC's performance, and then the balanced connection rejects the noise? Would ferrites on the USB cable help?