There are some dvd's that are available which has the potential of literately damaging the driver of a subwoofer because of the very strong output around 20hz, especially if played near reference level. Such tittles include The Haunting DTS, Titan AE DTS, Finding Nemo, U-571 DTS, Jurrasic Park III DTS etc. Well there is now a hidden gem of a dvd which I have recently purchased called 'Solar Max' which was recommended by some of the bass enthusiaust on the AVS forums for having some of the toughest LFE on dvd today and having trying it out for myself, it really does seem to have very strong SPL around 20hz and my subwoofer was pumping out a massive 122dB at only -05dB reaching well over true Dolby reference level and that is taking the inaccuracies of radioshack SPL meter into account level Solar Max is a documetary about our Sun and how every 11 years the sun's poles reverse with unimaginable violence and the peak of the storm is called a solarmax. It probably has the best close-up footage of our Sun thus far and is definitely interesting to watch. The cheapest place I managed to get this for was for just inder £5 including P&P http://www.ezydvd.com.au/item.zml/221378 WHEN WATCHING THIS DVD, PLEASE PAY CLOSE ATTENTION TO YOUR VOLUME LEVEL. PLAYING THIS DVD AT REFERENCE LEVEL HAS THE POTENTIAL OF DAMAGING YOUR SUB!