Will,

I too got my red-dot replacement unit but not for a hissing issue. It was a replacement for a bass issue I had with 2 channel stereo, remember? The red dot unit sounded much better in stereo than my first unit although the hiss was much louder. I could hear it from my sitting position around 10 ft away. I got another replacement red dot unit yesterday but I havent had the chance to test it out since I got home late. But basing from your post, I hope its not gonna be the same hiss because I will have a big dillema. I will let you know what i find out when I do the swap. I am planning to test it thoroughly this weekend. I returned the first red dot unit so I will compare this one with my first unit.

Ricky