what about the B&C de400, de400tn and the de500?
the de400tn seems to almost be a de250 with a shorting while the de500 has a shorting ring but is titanium instead of polyamide.
the de400 fr doesn't look as flat as the 250 and the 500 though.

can anyone comment on the sounds of these or has nobody tried them?
the de400 isn't much more than the de250.

There is one area that I'm still evaluating. That is long term reliability. I have used Eminence and JBL compression drivers for years and I know what to expect from them in just about every situation. They are very durable, handle power well, and last a long time. I expect a PSD2002 or 2426 to last a lifetime. The B&C drivers are relatively new for me, and I am wondering how the polyimide diaphragms (used in the DE250) will hold up over the years. This has yet to be seen.

i'm going to be building the 3pi soon and getting the delta12lfa and psd2002 used.
trying to decide if i should upgrade to the de250 right away...i'm thinking it would be best since that is the driver that handles the most frequencies.

i'm probably going to shoot for a 4 cubic foot enclosure and tune to either 40hz or 35hz.
according to winisd that will give f3 around 45hz and the gain starts rising just a bit around 200hz so that might help just a bit with BSC if i want to pull the speakers out from the walls. i think it only rises 2db at most though and it's a nice smooth curve.

not sure on exact dimensions yet but i think it will be a little taller and skinnier, maybe 38inches tall and 14inches wide.

the room is 15ft wide, 25ft long with 9ft ceilings.
do you see an problem with booming bass with that enclosure and tuning?

• Positioning and subs