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Quote Originally Posted by GM View Post
it doesn't matter whether two separate cabs or one big one is used, i.e. either will only 'sing' down to 30 Hz if tuned at least this low and EQ is used to flatten its in-room response enough.
The more I thought about it,the more I like one cabinet.With a MTM design the horn will be essentially in a fixed position (No Adjustment) with a TMM I could angle the horn down into listening position I have adjustable brackets for the sectoral horns.

I don't have any experience with a MTM that puts the bottom woofer at floor level where it will have more gain than the top one plus for me personally the horn is too low for the seated ear height, so it's your call whether to use the MTM or TMM.
Again with the MTM the horn is fixed at 35" although I just measured my 19's and the 811 is centered at 33 1/4" and they sound great.I'm leaning toward the triangular TMM just for the sole reason of being able to adjust the horn angle if the horn is up high I can point it down into the listening area.At 15' to 18' distance I'm pretty sure they will blend enough to not notice.I just wish I had the room for horizontal positioning.
If I were you then, I'd cobble together two 34" W x 70" H OBs, one an MTM and the other a TMM using a 500 Hz XO and compare their basic sonic signatures to see which layout sounds the best overall.
Sounds like a plan.I like this idea a lot.Open Baffle should be easy enough to build
Neither. The only physical tweaking would be internal damping and vent length, so use threaded inserts to mount the driver for easy removal and make separate removable vent mounting board(s) as required. Properly phasing the horn is best done digitally. I recommend putting the XOs for all speakers in a separate box located wherever the rest of the electronics are for ease of tweaking them.
OK that's easy enough then after cabinets are built all I have to do is add or subtract fiberglass insul.(damping) and (shorten/lengthen) (ports/vents) as required. Thanks Again GM for all your help.:thankU: My Regards ~ John