I think there was a thread running here at one point regarding this subject.

Generally, having a good surge protector outlet strip is good cheap protection from transient spikes from things like lightning strikes nearby (not direct strikes!) and other power over voltages taking out your equipment. You don't need to spend a lot for one of these.

Power line filters soak up some radio frequency and lower frequency interferrence from appliances turning on etc. The scoop on these is that if you don't hear any problems now like buzzes, pops and the like, you don't necessarily need a power line filter.

There are other, way more exotic devices on the market that undoubtedly work to some extent, but again, you have to have a problem for them to address in order for them to do any good.

Talk of these devices doing things like enhancing soundstaging etc are in my opinion total BS.

I use TrippLite surge supressor/filters in my system. They are pretty inexpensive, and get the job done.

[This message has been edited by soundhound (edited May 30, 2003).]