Overall Rating: 2
Weight: 1 (Unreliable Vote)
Date: 03/29/2000 05:36:20 am PST
By: Anonymous (xxx.xxx.113.194)
Link to this vote: http://www.excelsis.com/1.0/displayvote.php?voteid=31733

To respond to your message below. I have a pair of KSP 400 myself. What I did to fix the problem is buy a set of 3 prong to 2 prong converters. These can be found in your local electronics shop for under $5. Plug the power cord into this adapter, which plugs directly into the wall. This has solved the hum you experienced from your sub. 

>Just purchased these from UBid @ $1800...as soon as I plugged one of these in the subwoofer started making an audible "hum" (the other unit sounds okay)....based upon that I rate these a 2. I called Klipsch and they said they will fix/replace the amplifier for free (less shipping) IF I can get the amp deinstalled (it requires some unsoldering). I will add to this review in the future if Klipsch ever fixes this problem for me.

>Just purchased these from UBid @ $1800...as soon as I plugged one of these in the subwoofer started making an audible "hum" (the other unit sounds okay)....based upon that I rate these a 2. I called Klipsch and they said they will fix/replace the amplifier for free (less shipping) IF I can get the amp deinstalled (it requires some unsoldering). I will add to this review in the future if Klipsch ever fixes this problem for me.


I have had these for a few years now. The problem you are having is a ground hum. This comes from the ground of your electrical outlet. It is recomended that you but a converter from any hardware store, home depot, lowes etc. 

It adapts a 3 prong power cable that would normally plug into your wall to a 2 prong adapter eliminating the ground prong. This will get rid of the hum.