Best Sonos ZP-80 Mod?

I am very interested as well. I spent some time looking at the Cullen Circuits upgrade and it seems pretty solid though I wish it included a mod to the power supply as well.

Cedar, I wonder if the power supply from Mr. Chow can be used in conjunction with the Cullen Circuits mod? Do you mind if I ask how much the mod was?

Tboooe,
Both of those questions should be posed to Joseph Chow. I don't know the answer to either one. As a beta tester, I comment to him about sound quality, reliability, and ease of use. When he is satisfied with the power supply, he will upgrade my units to the final version, except for cosmetics. At that point we will find a mutually agreeable price. I have tested his designs for a few years now.
I know that he is testing them in his system as well as in mine. I have not heard the results in his system. He did tell me his target is to stay below $300 per ZP80.

Very interesting. It is getting warmer.

Hi Folks. I had the Cullen Mod done to one of my ZP-80's. I am still conducting my evaluation and will report back in another week (or so.)

Cedar, I sent Joseph an email, quite a while back (before the Cullen mod was available) and did not hear back from him.

Does Joseph's PS mod improve the sound from both the analog and digital outputs?

Thanks

Barrelchief,
Yes, the sound improvement is evident from both the analogue and digital outputs. Since I listen to the digital output through a superior DAC, that signal is better, of course. For casual listening (i.e., while I'm working busy the house), I use the analogue outputs. Before the power supply upgrade, I avoided the analogue outputs because the sound quality was unsatisfactory.