does anyone use these i know monster makes them they look like a amp but use a series of capacitors to clean power , smooth out voltage , and act as a surge protector .
There's no need for such a thing. You home wiring will do just fine. Most electronics have the ability to deal with fluctuations through the power supply.
Nice eye candy though, I have the Belkin PF60. If you have a seperate amp, these power filter/surge suppressor items make it a little easier on the amps as they fire them up after the preamp is turned and allow a little delay if so desired.
So far as any actual benefit to having one is purely up to each situation, as some people have very noisy/spiky power systems feeding their homes and these products help even things out, which in theory should make life easier on the components hooked up to them, although in reality, most products allow for these discrepencies with their own power supplies containing a certain amount of suppression already.
Another vote against power conditioners for any functional reason unless you live in a home that has major power problems, frequent brownouts, etc. Like others have said though, they do look nice in a rack and for some that's reason enough to throw one into the mix. There are a few edge cases like Jay mentioned where you might benefit slightly from adding one in, but most of them are pretty expensive for what you get.
How about a UPS? I was thinking of going with one of those to make sure my DVR does not get interrupted during power outages. (plus DirecTV usually takes awhile to reboot and reconfig)
I use a UPS on my setup, but I also have a pretty modest setup (aside from the M80s and EP350...). I bought it the second to last time my TiVo committed suicide (long story). I have a Belkin. It's worked just fine, although I've never tested it during an outage with the receiver or TV on.
I use the UPS to power the TiVo, TiVo external hard drive and my DLP. I too, would turn off the DLP if I lost power, but at least the fan would cool the bulb and the TiVo will go on merrily recording!
EDIT: I would never buy the "M" unit on principal alone! (Don't want to use their name...it makes them stronger!)
The Belkin has a smart "power on" setup that uses a trigger from the receiver to power on/off other components, some with settable delays, etc...i.e., my whole system powers up when the receiver is turned on without drawing from it's switchable outlet on the back.
Like I said earlier, if they do nothing else at all, one strong reason to buy these is how dang good they look sitting in a rack. Pretty pictures Mark.