Quote:
Originally Posted by MatthewK /img/forum/go_quote.gif
@killkli: I was just thinking, have you tried a ferrite bead on your USB cable to your Amp/DAC? It shouldn't affect audio quality at all since the data is just 1's and 0's but if the Amp/DAC is somehow receiving interference from the power going down the USB cable then maybe a ferrite bead would help??
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I hadn't tried different USB cables, but I tried the same USB device with different computer. The result is different too.
On my desktop computer, the noise is smaller due to better internal separation. I also tried to cut all other usb device off and let alone the USB DAC work. Which indeed improve the performance.
IMO, the USB doesn't work perfectly as the source of digital sound signal. It is not designed to do so. However, the problem of good digital signal is of much debate for audiophile world. So, it's still quite subjective.
As for the noise problem with my Corda Move.
It's not Move's fault but the noise of my USB signals.
And please also bear in mind that the noise is very minimal, which could only be audible via one of the most sensitive phone I have (I mean SuperFreQ, 122dB/mW & 21 ohm, which is very sensitive. Also please know that the noise is not present while using Move as a pure amp.)
For most of my other phones, this noise is non-notable.
So it's really not a very big issue.
BTW, how sensitive the SuperFreQ is? I could hear the ground noise of AMB Mini3 portable amp........
This also prove that the Headsix and Move is indeed better performance in noise regard to Mini3, because I could not hear such noise with them as with Mini3.