Amp is plugged to the wall, why use a conditioner?

+1 on Running Springs.

The reviews on them often mention dynamics of the amps not being constrained. A real selling point for their line of conditioners.

I just compared a PS Audio P300 power regenerator on my front end (everything but the amp) to everything (including amp) plugged into my Running Springs Haley and there was very little difference between the two set-ups. Perhaps a slight loss in dynamics with the P300, and there was audible fan noise from the P300. Considering all the benefits attributed to power regeneration, this seems to speak very highly of the Running Springs products. Glad I was able to audition the P300 before buying.

Gdush, you might read this...
http://10audio.com/audience_ar2p-to.htm

...and other reviews of the Audience aR2p and its ...TO variant.
http://www.audience-av.com/conditioners/conditioner_reviews.html

I've ordered a '2pTO for my 650-Watt McCormack DNA-750s. We'll see how the system sounds with and without it.
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my amp does not sound nearly as good plugged into the Running Springs Jaco as it does plugged directly into the wall.

here is my recent experience, fwiw: originally I plugged both my mono Jungson JA-50 80 watt class A amps into my Shunyata Hydra, along with just about everything else. In my wall I have two sets of outlets, both high end receptacles, one running off a 15 amp breaker along with other outlets, switches etc on that end of the house. The other outlet is a 20 watt high end outlet wired to a separate dedicated 20 amp breaker with 10 ga romex. I believe the standard house romex is 12 ga. Recently I unplugged the amps from the Shunyata and plugged them directly into the dedicated 20 amp circuit. Couple observations: the amps sound much more powerful and I don't have to push the volume knobs up nearly as far on the pre-amp as I used to. The bass is better and the system sounds fuller, less constrained, and less 'pushed'. I've considered buying more powerful amps for my Khorus X mk II's but no longer feel that is in any way necessary.

Markmendenhall, I had a similar revelation last year after directly plugging everything into the wall outlets. It restored tone, current ... just sounds more natural but downside is hearing noise.

I discovered Weizhi PRS-6 passive from a local audiophile. It eliminated the noise and doesn't alter the tone or limit current ... just sounds fabulous. I have 2 PRS-6, one for mono amps and other for rest of components. Also have 2 dedicated 20 amp circuits with Maestro outlets.