Very, very loud speakers for those who listen at '11'
If you really want to feel da noize, check out Professional Home Cinema speakers.
Designed by L. Paul Hales to produce concert-level sound in the home, speakers from Professional Home Cinema dare to go where no audiophile manufacturer would: PHC speakers play loud enough to duplicate live concert volume levels. For real, no kidding.
Take the SCR-12 ($4,000 each), it's a medium format "Screen Channel" loudspeaker capable of reproducing the awesome dynamics and unrestricted volume levels of a commercial cinema or concert PA system in your home theater. It uses digital signal processing (DSP), high-resolution frequency response shaping, and time-alignment to produce a maximum output exceeding 130 decibels.! Even so, the SCR-12 measures a fairly compact 24x15x12 inches. I assume most buyers will place the speakers behind a perforated projection screen.
PHC speakers are meant to be partnered with PHC amplifiers. Complete 5.1 channel systems start around $30,000. PHC offers a range of high SPL capable speakers, subwoofers, and an amplifier.
Professional Home Cinema's Web site is about to be updated. Check the site in a few weeks to see the changes.