Hi and thanks to all that have replied to my question.
I didn't want to mention my project because I thought it would cloud the issue, (I thought it was a simple question, seems not), but I feel I need to. I am using a RPI 3B+ and a ESS9038Q2M Dual Mono Dac board with an Isolator board, Standard I/V output board and an ESS Controller for the Dual Mono Dac. The output opamps are 2114D Jrc, to be updated to either V5i semi-discrete or V5 discrete opamps. The crystals are also basic, like the opamps just to prove it works but I have two Crystek crystals on order. I have included an image, 'xcuse the quality, I edited it to get the size down for uploading. At the moment, while assembling/trying it out I am using the Kolink SFX psu to power it, a 12v wallwart to power My WD 1TB external drive (which has the Hi-Def (anything above 16/44.1 flac) and CD quality (16/44.1flac) files onboard) and a standard 5v/2A wallwart to power the RPi. These are plugged into a 4way individually switched power strip. I am hoping to get it down to 1 plug. As shown, the psu is in a Silverstone sfx case and the Dac will be housed in the case it is sitting on. I am considering using Neutrik 6 pin xlrs to connect the two cases. In time the psu will be swapped for either rechargeable LiPo or Ultracaps.
Now, will I blow anything up using the Psu as I am doing. Thanks again guys.
Mark.
Dual Dac