Wow -- those are mighty impressive looking bass traps, and they really seem to disappear once you get the frame and grill installed. VERY nice. I'm tempted to load up the back of the Magnum with OC 703 sheets, grab a sharp knife and head over to MarkSJohnson's house.

Just a quick thought -- we look real hard at the +/-3 dB frequency response specs for speakers, ie 6 dB deviation within the listening range. Very roughly, those traps took the deviation from 42 dB (!!!) down to 26 dB. The big bass peaks came down by 5-7 dB, and in most of the other frequencies the excursions were down by a few dB.

Very interesting results. Conventional wisdom is that you need a lot more traps, but those are BIG honkin' traps. Thanks very much for taking the measurements and posting so much good information.

Last edited by bridgman; 07/25/06 05:22 AM.
M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8