SB Audigy2 ZS producing a hissing sound?

[mjz_5]

I have my Sound Blaster Audigy 2 ZS connected to a Technics receiver (using three mini –to- 2 RCA connectors connected to the discrete analog inputs on the receiver). Lately, I have been hearing a hissing sound coming out of the speakers. Nothing is wrong with the receiver because if I connect my GTXP, the noise goes away.

Any ideas?