Hissing Problem

[mikedomi]

beavis no this is what you said and it does not say anything about the laptop
(quote)
put a 3 to 2 plug adapter on the amp. you need to eliminate the third prong on the mackie amp power cord.

the amp is not the problem it is most likely the laptop
I too had to do this to a dell all so

not taking side but I too read your post and you said nothing about it

you had the right fix just on the wrong piece

[MackieRocks]

First off I want to thank everyone for their input! I got the problem resolved. Here's what I did.

I have 2 Mackie SRM 450's connected to a Mackie DFX-12. I have them daisey-chained and only one of the speakers was hissing. I added a 3 to 2 prong adapter to the laptop first. That took away about 80% of the hissing. I then added another 3 to 2 prong adapter to the one speaker (self powered) that was the problem. That took care of the other 20% of the hiss!

This message board is the greatest! I am one happy camper! Thanks all!