Settings for PS Audio PowerPlant

Gerd: the preamp is a 380S and it does not seem to be affected by anything except a drop in voltage. I have a PS300 supplying the preamp and a Meridian 508-24 CDP and the power supply for some Perpetual Technologies stuff I am playing with. The amp (Classe 401) is too big for the 300.

I've been all over the map on this one, as I'm sure anyone using a PowerPlant w/MW has been.
It depends on the music and the source (LP or CD).
My fave's are SS1, SS5 and SF8, occasionally PS2. I find SS1 to give the most natural sound, with extended hi-freq response. The others can work well on really 'processed' music.

I seem to have no choice on mine. I am forced to use the Sin or PS2 (which I use) as all the "SS" settings produce a very disturbing pulsating hum (only my digital sources and preamp are connected to the PP300). My PP300 is connected to its own dedicated line with a PS Audio Lab Cable. Anyone else have such a problem?

Fmpnd, I had a very similiar problem. The PS1 was the quietest for my transformers. The SS5 was a bit noisy, but not so bad I wouldn't use it. SS1 was out of the question and all the others seemed to lack something. (depth and weight) So I used the PS2 80% of the time.

That became "the" issue for me with the PS300. If each setting was adding or taking something away, it seems to me that I was changing the signal and music. I bought the unit to filter and clean up the power, not as a tone control. I've gone to the Hydra, it's just nuetral, quite and runs cool. It also tends to open up the presentation better than the PS300 at any setting.

I was able to use the PS300 for my amps, pre-amp and SACD player. The presentation was best with the amps included, but the Hydra for my system is a better fit. QUITE!

Is it a mechanical hum from the physical component boxes or an electrical hum through the system?