On my way to the Supershoot in Sunny Northern Ohio, I made a detour via Springboro. Gotta say that I thought the BR-1 speakers were nice, but I thought they sounded a little gritty. Amazing bass from such a small package tho (and I checked that the sub was turned off - those Titanics will rock your world...) - maybe the guys behind the counter were running 'em through an equalizer - I didn't check. Anywho, picked up a copy of the Weems book, and on an impulse, since I decided not to get the BR-1s just yet, I grabbed a case of the 4" Pioneer buyout speakers (hey, 90 cents each for 32 of 'em, with no shipping...). So, here's what I'm thinking... 16 of 'em in each tower on approx. 4" centers (haven't completely figured out the power tapering bit yet, but I'd like to keep the overall impedence at around 6 ohms or greater). Looks like if I run internal dimensions of 12 wide x 18 deep x 86 high, I'll end up with 10.75 cubic feet. If I've plugged the data into WinISD correctly, that gives me a little hump around 200hz, but it doesn't look all that bad. Venting looks to be 8 x 5.51" dia x 4.43" length vents. These will be in the rear, and will be PVC. WinISD seems to want the thing to be a vented box - or maybe I screwed up entering the data... I've been thinking on it, and I'm going to get a pair of plate amps, which will each run a pair of the Dayton 10s parallel for the low end. Haven't decided on tweeters yet, but I'll probably run the thing "full range" for a little while before modifying the baffle for tweets and adding a crossover. What do you think?