Power Plant Premier making sound worse?

"If" there is too much draw with all componenets pluggedinto the PPP that could result in distortion.
I suggest experimenting further.
Try using the PPP for just the digital: then just the pre; then pre & digital together.
Unless the PPP is faulty I expect you will have positive results. Would be interested to hear your results.

Well, those brutal nickel plated outlets on the PPP may have something to do with it.

As Solecky said, experiment. There's no universal rule of application with these things. It is very common for only front end gear to be power conditioned. Many, many listeners prefer their amps directly connected to the wall. I've also heard from more than a few that didn't like conditioning at all after they got dedicated lines.

I tried the LessLoss PC from the wall to my PPP and did not like it. I preferred the PS Audio cords in that position. Different story using the Lessloss from the PPP to my preamp. Liked it a lot.

Similarly using a PS Audio Duet, I did not like the LessLoss from the wall to the Duet as much as a PS Audio cord but liked the LessLoss from the Duet to my amps.

I run a dedicated line to a single outlet so I need the Duet and PPP or something similar.

The PPP will put out 1500 watts contiunous and if the componenets draw more than that or close to it the PPP will shift to passing current directly from the wall or not produce the quality of sound it usually does, respectively.

I use mine with a dedicated 20 amp line for my front end components and a smaller HT amp and it sounds great. My main amp is too much for it and I use a Hyra for it.

There were several generations of the PPP with the latest souding the best and be identified with a 'F8' somewhere in the serial number. The prior generation of F7 isn't bad but the F8 production runs that began in August 2008 have the best parts in them.

Should you want more information feel free to email me.