And if so, which one and do you notice any difference?
Mine has probably help with the brown-outs we get, but I don't see or hear any permanent improvement on picture or aound quality with it - I guess my AC must be fairly decent.
Monster HTS5000MKII<ul><li><a href="http://www.avdeals.ca/monster/MPHTS5000MKII.htm">HTS5000MKII</a></li></ul>

Looks to be very similar to the Monster product, with same 100k guaranty. They work!

<small>Note: I'm not belittling the effect that a proper high-quality line conditioner can have on system quality; I just really get a chuckle outta this strip. :-)</small>

<img src="http://www.penny-arcade.com/images/2002/20021125l.gif">

Many homes will notice minimal difference with or without one. Some homes I've used them in for customers have allowed for very noticable improvements. You never know if it's of any use until you try it I guess.

I had a lightening strike and had some damage. They determined that their equipment failed and paid me for new equipment. I like the product and would recommend using some sort of protection and conditioning.

In addition to the protection my subwoofer sounds much cleaner and accurate... A by-product of the line filtering I'm told.

Rob<ul><li><a href="http://www.powersystemsdirect.com/Panamax/Max_5300_M5300_Home_Theater_Surge_Protector_Max530 0_47.php">http://www.powersystemsdirect.com/Panamax/Max_5300_M5300_Home_Theater_Surge_Protector_Max530 0_47.php</a</li></ul>