I'm using the Promedia 5.1's as well as the DD-5.1 decoder and have a problem with the volume being quite low, even when turned up to maximum. My setup consists of a Soundblaster Audigy 2 Platinum along with the previous stated Klipsch products. I'm using an RCA cable that goes from the SPDIF out on my SB Audigy 2 Platinum LiveDrive to the DD-5.1 decoder RCA digital in. The DD-5.1 functions correctly (whether the signal is Dolby, DTS, or stereo), so everything seems fine. The only problem I have is even when I have the software SB volume controls turned all the way up in Windows, along with the volume level on the DD-5.1 (0 decibels) and with the volume on my Promedia 5.1 pod set to 80, the sound isn't exactly loud. It's at a comfortable listening level. I'm wondering what could be the cause of this. The RCA cable I'm using is quite old but even when I tried purchasing a Monster 3 foot optical cable for $40, the sound volume was still the same. I'm not sure what else to try. If anyone knows of a way to fix this or has an opinion on the matter, I would very much appreciate it. Thank you.