I recently bought a pair of Z-5300's and one of them is only producing a faint sound. i don't know if it has always not made a sound and i'm just noticing or if it just went out. I don't want to bring them back yet just incase it's just my computer. my MOBO supports 5.1 (actually 7.1...http://developer.intel.com/products/chipsets/915g/index.htm). i have my settings to 6 speakers, i'm running XP SP2. O ya it's the rear right one thats not making sound.