Graeme, you say you are not blown away and have set the sub up acorrding to the manual. Is the sub level matched to the speakers with pink noise playing? if so try adding a couple more db to the level for the sub, but the idea for the sub is to not be 'blown away' but it should just be filling in the lower end the speakers are not good at reproducing. You really shouldn't notice a sub is even on during music only during movies.
Well I spent a few hours today fiddling, I have set everything up with the spl and have allowed 5db extra on the sub and 3 for the center. I didn't have anything really decent to play while I did the crawl but hope to get to that later.
I have some blue rays coming tomorrow, so I can test it out a bit better.
I only had some music to try and test it with today, but I noticed the bass sounds much better in the wife's chair than it does mine, which is only 2 ft away. I found that absolutely amazing.
I plan on doing a sub crawl tomorrow and will also try changing the way the sub faces.
