I am having an issue with my DS and I am hoping someone might be able to offer some suggestions.
I am a long time PWD II user and recently upgraded to the DS via kit. My configuration had been: Olive 4HD to PWD II to Axiom Passive pre to D-Sonic M3 to Vapor Audio Cirrus speakers. My goal was to replace the PWD and passive pre with the DS and then eventually switch to an XLR connection. So my motive for upgrading was as much about the improved volume control as the updated DAC. I excitedly received the kit, did the upgrade and placed the DS into my system while removing the passive pre. I was immediately greeted with static, a ground loop hum, and a weird swirly noise. The swirly noise occurred regularly once every second and sounded like I was tuning a radio. I ripped apart my system and rebuilt it trying various combination of cables and layouts. My power cables are mostly Triode Wire labs with a Wireworld strip. My RCA digital cable is Analysis Plus and my interconnect and speaker cables are Grover Huffman. Eventually, I found a combination that worked. If I used a cheater plug on the DS and/or Olive and a toslink between the Olive and DS, I was only left with slight static that could only be heard with my ear to the speaker. This is not ideal, but manageable. I then replaced the RCA interconnect with an Antipodes XLR which allowed me to remove the cheater plug and go back to the RCA digital connection. I was happy with this solution because I had planned to go XLR anyway.
A month later, I started to hear the static again, but no ground loop hum. The static slowly increased over a week (it seems stable now) until I can hear the static from across the room. Music plays fine, but the static is still audible. The swirly noise is back but less that before and now at two second intervals. So, I ripped my system apart again without a solution. Then I replaced the DS with an old Cambridge Audio dacmagic and the system is quite. I did not play music with the dacmagic because it doesn’t have a volume control.