I have a 5.1 setup with 4 B&W DM 303's, the center-channel version of that speaker (forget the model #), and the middle-size SVS powered cyl. The B&W's are good for the highter frequencies, and the SVS is good for the low stuff, but I can't really hear the lower frequencies (ie. a bass guitar) very well. I'm running everything with an Onkyo TX-DS696. I tried hooking the sub to a line output instead of the sub output, and turned the crossover up, and even off, but I still don't really seem to get the stuff between the SVS's deep bass and the midrange from the B&W's. I was thinking of getting a B&W ASW-300 to fill in this area, but it's pretty expensive. I'd rather get a set of passive woofers (the Onkyo has another set of speaker outputs for the front channels). I don't care about the surrounds or the center, I just want a little more mid-bass on the main l/r speakers, and I'd rather have it in stereo instead of mono (as adding the ASW300 would do). I don't want to step on the SVS either, it seems like it would be tough to get all the crossovers right. I guess, in summary, when I play music on the system, it doesn't sound "rich" enough. If I had it to do over again, I'd probly get towers for the 2 front channels, but I have what I have. Any suggestions would be much appreciated. Thanks.