Power Strip vs. Line Conditioner

I have a dedicated 20 amp outlet with a 14 outlet Vans Evers plugged into it. Everything is plugged into the Vans Evers, including the amp (Hafler 9505 DIABLO), powered woofer and the Acoustat interfaces. This amp sounds better this way, so one needs to experiment. Don

You really need to experiment extensively to determine the optimum for your rig, meaning different types of filters work better on different components, as was stated above. Example: the Chang series of conditioners offers various levels of analog & digital filtering, sometimes even combined into one model with multiple plugs. Yes sometimes even straight into the line is the best way to go.
What has not yet been mentioned above, & to further complicate this issue, is that various combinations of upgrade AC cords (different makes/models) work in tandem with the filtering to produce still more variable results. It can sometimes (but not always) take you a very long time to determine which combination you most prefer.

I decided to not use power strips. Instead, I took the outlet out of the drywall, put a triple wall-mount box in, replaced the original outlet with a Hubble, put it in the center of said box, with two Hubble outlets connected to it with 4" of #10 to the left and right. Recently I got four MOV's and wired those accross the incoming wire inside the box, this way I have great surge protection too..

This has blown away any power strip or conditioner I have tried!

Niels.

I guess I should augment my post by pointing out that I have now had a PS Audio PowerPlant 300 on my SCD-1 and ML380 Preamp for 2 days, which did improve sound somewhat...

Mezmo, I found that using a good power strip (wiremold) from the wall to my power conditioners worked better for me. Just my 0.02.