I spent a very good Friday night listening to the following system Naim CDX 2 Bryston Sp1.7 Preamp/Processor Bryston 7B SST x 2 Bryston 6B SST (3 channel) PMC MB2 Loudspeakers PMC TB2 Surrounds and centre PMC TLE 1 Sub I was enlisted to help setting the subwoofer up properly (Unwise choice as I have a very basic knowledge!!) and was astounded at how much warmth and extra bass it added to the sound. Bearing in mind the MB2s offer bass down to 20 Htz frankly I was surprised. The system was used in direct stereo mode for an hour or so whilst I pissed about with the subs position and then we spent another few hours dialling the sub in. Sub is set on very low level, cut off at min (40HTZ) and running off its low level input. Now this system, to my mind, is very accurate indeed so I was baffled as to why a sub made so much difference and not in a blooming, booming way. The bass remained very tight, very, very fast and frankly intergrated wonderfully with the mains. Turning the sub off made the sound unacceptable in comparison it seemed very, very bright without. I now have no doubt that a decent sub will be my next purchase and wondered what you guys think of this experience is it normal?