I just finished my Basement HT room. It sounds great, except for the bass, which has dissappeared. My room is 20'L x 14'W and I have an 7'8" ceiling. I used to run the front speakers 8'apart, with the sub in the bottom of my stand. It sounded great. Now, the speakers are 11' apart and the bass from the sub in the stand is non-existent. The floor is concrete with a good underlay and carpet, so that in combination with my speaker placement may be a reason. I have since moved the sub out of the stand beside the left main, the sub port firing at the corner. Am I being unrealistic in my quest for bas due to the constrution of my room? One guy told me a wooden subfloor would have helped. Also, could someone please guide me to an easy to undedrstand sub calibration guide?