OK heres the situation... I just got an Acme B4, and I want to play my Mp3s through it. I've got a Sansamp BDDI, and I tried hooking up the Sansamp's input jack to the line out of the soundcard with an adapter. I plugged the Sansamp's output into my rack setup, a BBE BMax and a QSC power amp. I can get the Mp3s to play, but the volume is really, really low, and it sounds like I'm playing it through a clock radio instead of an 1800 watt bass rig. Turning up the gain and volume does not help. What gives? One thing I did notice is that the Sansamp circuitry would not engage (the red light will not come on) with the line out from the computer plugged in to its input.. if I plug a regular instrument cable into it, it comes on no problem. What am I doing wrong here?