Theadmans I just read your post after my reply. Seems you've had a similar experience to me. I was almost about to accept a 2nd chip but then through my contact with Stan lost cconfidence in the product. Yes it sounded great but if I was going to run into issues this early on that couldn't be solved which were wrongly directed at the rest of my system then this was not something I could live with. To be honest this puts me off buying a Beresford product again.
I was gutted at first but at least now I have the Mdac to look forward to.
Source: Sony SCD-XA3000ES,Audiolab M-DAC+,Pro-Ject Debut Carbon Espirit SB(+Ortofon 2M Blue),Aiwa ADF-850, Amp: Pioneer A-400(modified). Speakers: Monitor Audio RX6. Cables: Atlas Elektra/Ascent-CD, Atlas Equator-TT, Atlas Hyper Bi-Wire, Mains:AUDUSA Eupen, RussAndrews+Tacima distribution