Here’s an interesting video it’s a discussion with company founder of the HPS-4000 John F. Allen who talks about getting the best sound from the musical pit to tight areas like underneath a balcony.

Video plays on windows media player.
http://www.to-the-pointe.org/20050415b.wmv

For more information on HPS-4000 that is High Performance Stereo visit the site
http://www.hps4000.com/pages/specialann.html