++power cords with power conditioners?

There is still benefit, but it seems like the variables would change a lot. If a cord sounded too "filtered" when plugged straight into the wall, that aspect would be made worse by something like the PS, at least when it's plugged into the same component in both cases. I don't see how it couldn't be this way, anyhow.

You can, but I doubt you'll hear any difference on the front end. Your amps/preamp should have better power cords due to higher draw, and the shorter they are - the better! good luck to you

In my experience with an Innouye Line Conditioner (which I use with a Michell Gyro turntable, there are definite sonic differences with the turntable which can be heard when the power cord is changed on the conditioner. My experience is with fairly inexpensive cords on the conditioner (am currently using a BMI "Edge" cord which was very cheap-purchased for $50 through Audiogon Auction), also used a LAT cord with good results; both these cords gave pretty significant sonic improvement over a standard shielded Belden cable. Use more expensive cords on my CD player and amp, but find these definitely sound better straight into the wall. The turntable, greatly benefits from the line conditioner. Blake

Although a power conditioner by itself is usually a great improvement, a premium power cord will make even more difference. Just think of each power cord as basically a 3-6 foot antenna, or at least the cheap(stock) ones are. Also, the PS300 is not just a conditioner, but more of a restorer. It reforms the AC sinewave to what it should be. Go to their website; it's quite good. For interests sake, I use Gutwire cords on my stuff. Good luck!