Pass Aleph amps with PS300 or PS600?

I have the Pass preamp, but the model 5 power amp. Recently acquired a P600. According to the P600 panel display the system (including phono preamp, CD and DAC) draw between 370 to 430 watts. The musical advantages of the P600 are as advertised. Give the P300 a try, it might work with the amp. If it doesn't, then you can either use it on the source component, or return it to PS Audio.

Have Aleph P and 2s (300w idle each), and wonder if there are audible benefits from these power-line devices. Isn't one of the benefits of that bathtub of Class A energy idling along to act as a flywheel (sorry to mix metaphors)? Anyone hear a difference?

I've had a P600 for about a month. It replaced one of the big original (slant sided) API units supplemented with Versalab woodblocks. It's plugged into a dedicated AC outlet. Using it with Pass pre/power amps the change in sound quality was an unmistakeable and very positive. The bass became more dynamic, low level music was more readily apparent, yet the sound lost none of its cohesiveness. The sound acquired an overall more natural texture. The effect is more noticeable on digital (I've been swapping out Sony, Sonic Frontiers, Goldmund and Wadia units), but still quite positive on vinyl. The only downside is that the unit is very large and it throws off a fair amount of heat (but less than the Pass 5). A strongly recommended combination.