Hello chaps, Tis me! I have been experimenting with the Sub in a more sensible position and seem to be getting on much better now. I would still like a little help if you wouldn't mind taking a peek at my SPL readings on the attached Excel document. Just for your info I have 3 sets of readings: Blue - Tuned to 20hz, raw / compensated readings Pink - Tuned to 16hz, raw / compensated readings Yellow - Tuned to 20hz BFD PEQ adjusted readings So for those of you interested in playing with Port bungs you might get some idea of the affect it may have on your system. The Front speakers are set to large as any other crossover setting gives me huge troughs in the graph. However there are 2 peaks, one at 80hz and another at 135ish hz. Nothing I have tried with the BFD will even touch these so I have to assume it is related to my fronts and maybe a phase issue. I have yet to tackle this and would welcome any suggestions. By the way I cranked the system to ear bleeding levels the other night (before my PEQ efforts) and sat the wife in front of Master & Commander for the opeing 15 mins or so. She was grinning like a cheshire cat... it really is awsome!