Power Conditioner Advice please...


I would be grateful for advice from the forum with regard to the following:

My system sounds significantly better in the evening/night than during the day and given that I live in a busy commercial area it would seem likely that I need to clean up the power. 

Ultimately, I will buy an AC regenerator but do not currently have the budget for that. I am therefore looking at a power conditioner and which I hope to buy pre-owned for under $/£1,000.

Given my amps draw a large wattage (peak 400w into 4ohms) I am nervous about placing a conditioner between them and the mains.

The other components:

1.     Auralic Aries - has its own external linear power supply.

2.     DEQX  -  “Nine separate power-supply regulation stages  including four that provide the main analog rails deliver extremely low measured distortion....

Where do you think I would be best to apply any power conditioning?

Any other suggestions welcomed.

Thanks very much

soma70
the isolation trans. needs to be sized to your system's power demands to prevent it from limiting dynamics

power quality should be better at night in a large city or near a commercial district

In an R1 zone not so much

I am having my elec. utility put a measuring device on my meter head and they say they can also do RF checks - already have a few moths data from the sub-station I draw from but not too helpful at the 12 kV range...
Thanks to everyone for the additional input which is all very interesting. I just need to note here that I am based in the UK (so some of the suggested products are not available here) and I did install a dedicated 20 amp feed from the breaker box with its own ground and so I believe the internal power is pretty good. PS Audio supply in the UK and so I plan to buy a Dectet and will report back if that makes an improvement to SQ during the day...I need to sell a mini-dsp on eBay before I can purchase the Dectet but promise to report back here as soon as I am able.
Take a look at PI Audio Group: http://www.piaudiogroup.com - Dave is AMAZING to work with. He helped be select the best solution that is well suited for my setup. He *really* knows his stuff.

My UberBUSS (http://www.piaudiogroup.com/UberBUSS.html) will be in my system soon so I can't talk about performance in my system just yet. I will be sure to post an in-depth review as soon as I have put some listening hours in.

Until then... head over to the site and check it out!

-Ron
@ivan_nosnibor 
that was such a helpful post.

Can I just say that regenerators can sometimes compress dynamics when there is a large or sudden current draw. So you may get smoothness and quietness at the cost of dynamics and range. Have the amp designers ever recommended anything?
Glad it was of help. That's true what you say about regenerators. I don't use one. I've never been aware of any amp designers that seem to be following the issue that closely (or perhaps many even at all, really). 

I did have really good luck with a company called Alan Maher Designs (facebook or alanmaherdesigns.net). One of the very few power conditioning strategies that doesn't have any sonic drawbacks, unlike conditioning. Much of it is passive and draws no electricity to work. You can use it with any equipment and with any amp under the sun, no matter how much current or wattage it may draw from the wall - so there's never any issue about dynamics or power ratings. 

One piece of AMD I bought (this one Not passive)(Alan sells his designs in piecemeal so that you can treat whatever noise sources you have directly at the problem's source, rather than just trying to treat the last 6 feet of wire), a "QPS" (Quantum Power Station, if memory serves) is designed to act as an AC power reserve for your system. As AC line levels drop below a certain voltage, the system as needed starts tapping into the power reserves that the QPS has been storing up until the low AC line levels are restored...up to about 800 watts on tap with the QPS...and as the line levels are good the QPS recharges itself and continually maintains a full tank. I think that item was around $500 if I recall and the version of it I have is no longer in his lineup, but I'm sure he has an alternative and, knowing Alan like I do, it's likely better than the one I have...and may even cost less, I dunno, but Alan would be the one to talk to directly on that. I did not have too, too many voltage irregularities beforehand, but since plugging in the QPS at the system duplex, I've had absolutely none...although, in truth, I know that's likely not All due to the QPS since I also own sooo many more AMD products to treat an array of different problems in the system and around the home...all aimed at better sound, so all that is contributing to one degree or another as well. All AMD products electrically "see" each other on the home's circuit - the more pieces you add in your quest for better sound, the more of a slight performance boost they all give to each other. I have well more than 50 products installed, so the boost I'm getting now is tremendous with each new piece...and over the last few years I've seen his products get more effective and cost less than earlier versions - none of which helps my addiction!

All of these sorts of discussions about various power-related issues and solutions tend to be good, unless your home has an actual problem that needs to be addressed separately....a DC component in the AC, serious grounding issues, etc. But if anyone might be having trouble along these lines, the I'd like to point out that Alan does not consider himself the owner of an audio company. He calls himself a grounding specialist. He does consultation for any residential and any small and medium-sized businesses in the US. He is one of the few fully certified building biologists in North America. He's also well acquainted with power grid systems worldwide, so he can answer questions on that as well. He also has a successful side business as a mastering engineer (digital). I'm not affiliated with Alan in any way except as a very satisfied customer. Contacting Alan by fb message is the best best, but you can call him, too. I think his number is on his site.

Just for reference here, but if you're thinking of trying any one of his products, Alan prefers that new customers buy two initial products first (regarding the power coming in at the meter and also the breaker box) and after that, you're in a good position to look over the rest of the catalog if you're looking to solve a particular problem...or if not, you could leave at the improvements in sound and picture right there and call it a day. These 2 products should be installed first in order to "chase", "corral" or "steer" the noise nodes that build up at these locations and drive them further into the home where they can be better dealt with by other AMD devices. They are as easy to install as wrapping a piece of paper, and taping it up, around the incoming PVC pipe and inside the breaker box door...takes about 10 minutes...costs about $350 or so for all of it. I just didn't want to create the impression here that anyone should just be able to pick out any piece in the catalog willy nilly and get the best from it straight away. But, Alan is your guide for all that.