Originally Posted by audiovideoholic
Well, I doubt they will be IB. That was the original plan but since blueprint audio hasnt released the IB drivers
I ordered the 21s. It was going to be 2 malx 21 FLHs for the 30hz+ and the IB drivers for the ultra low FQ. But now the mach 5s will most likely be small sealed with lots of juice but if ts params model better for IB its not out of the question "yet".
The room is about 35x18x10 with the baffle wall its about 31.5'x18'x10' As close to the golden ratio as I could get.
First, again congrats on the build. It's enjoyable keeping up on the progress. That ceiling is way cool.
It's my understanding Fi has released their IB3-18's, if that's what you're referring to. In an IB alignment, those drivers and their inherent bottom octave, creates a wonderfully efficient manner in which to create LF. Not fighting the small box results in lower amplifier demands, lower electrical requirements, dramatically lessens the effects of compression.
All that said, several custom 21's, would be a fun exercise as well
Best of luck