This is the first real power conditioner I have had in my system, as previously I used only surge protectors.
The filters in the PF60 are not directly adjustable, and I don't think thay should be; the circuits are already optimized to reduce line noise and various sorts of interference.
The PF60 has 2 high current plugs (on a single filter bank) for amps, which I am using for the BASH 850W monoblock subwoofer amps in my Infinity 4.1t's. Since these amps only cut in below maybe 45 Hz, I can't honestly say I can tell any difference, I don't think my ear is well trained enough to know what to look for, and the bass was already pretty darn tight...
I keep my primary monoblock amps (Goldmund Job 150's) plugged straight into the wall using PS Audio Xstream power cables, which is what both the mfg and all others who are 'in the know' I have consulted agree upon.
What I have learned so far though, through talking to folks who understand the electronics, is that the low amperage and digital front end components get the major benefit from power conditioning. Big transformers in power amps tend to eliminate low levels of line noise by their inherent operation. (I hope some other sympathetic goner can expand on this for me as well...)