Should Amps be plugged into a power conditioner?

For whatever it's worth, in my experience with my Parasound Halo a21+, plugging it directly into the wall or into my Black Lion PG2R conditioner/regulator dedicated power amp section has resulted in no significant improvement. Furthermore, other tweaks made on this specific amp has resulted in no significant improvement, like Patrick Cullen PC and purple fuse. However, the PCs and fuses upgrades have had very significant improvements on all my digital gear. Point being, you always have to find these things out for yourself with your particular system in your listening environment. There is unfortunately no shortcut.

All of my components are plugged into my MPC1500. C2700, MC611's, MCD600,MP1100. I have never had any issues. The MPC1500 has both switched and unstitched outlets available. When there is the threat of storms in the area which is frequently this time of year, I unplug the MPC1500. 

@ghdprentice  did it also shrink the sound stage? What about tonal balance? How about rhythm  and pace? Tone? 

Do you use any of the hifi  receptacles or the hifi  plugs? 

Regards

Current delivery and immediacy seems to be the defining point. At least in my system anyway. I was plugging my amp directly into a high quality outlet to much better effect (another important thing to consider btw), until I got a good deal on a used Chang Lightspeed power bar and filter that touted “unlimited current”.
With that in place and everything plugged into it, literally no difference than plugging the amp straight into the wall in terms of dynamics and scale. But a slight improvement on background there from what I can tell.

It amazes me to hear all these different opinions here, some of them based on the equipment they have bought.

Something I learned a couple of decades back was to make sure your power was as clean as possible to your equipment in the first place. What I always suggest to everyone regardless of their equipment or what they want to spend on a power conditioner (or two...) is that they look after their power coming into their equipment first. Make sure you have dedicated lines to your equipment and that this power is not shared with the rest of your home. Only after this is done can you start comparing ’line conditioners’.

To be fair and to note, I have a couple of upper-end Chang Lightspeeds that I still power my preamp and non-power hungry components into. But any power delivery component such as an amp or subs are plugged directly into the wall.

To this day, and in 3 different homes, this has been by far the best configuration. (all direct comparisons because none of these homes had dedicated power panels to a music room to begin with)