I've been trying to figure out a way to do use JBL 2202's or 2206's, along with 2445J's & 2385 horns, and a 2404H.
While I could do a passive system, and mount them in a box, like the JBL4732; which actually would be easy if I wanted to do Jammin Jersey...
What I think I'd rather do is build custom boxes, using the Altec 816 cabinet plans, and mount a single 2202 or 2206. Then, either externally mount a 2445J/2385 horn, and a 2404H, or alternately add a smaller separate section above the 816 cabinet to hold these two (with the 2404 on top).
I've got several questions so bear with me:
I'm going to tri-amplify the speaker; using AB Systems 713A mono tri-amplifier (500-250-250 @ 8 ohms).
1st:
While the amp has active setting for x-over points:
where is the best place to x-over the 2202/2445J-2385 (500HZ)??
where is the best place to x-over the 2445J2385/2404 (???HZ)
2nd
Since the Altec 816 plans are for 15's can I just proportionally alter the design once I get it into autocad via a friend? Since the JBL Pro enclosure guide says 1.5 ft3 for an enclosure, how is this cabinet volume affected in a a front loaded horn?
3rd
Can I just redesign the cabinet to yield the appropriate volume suggested in the JBL guide? How much dampening should I use?
4th
The JBL guide also says 80HZ with a hole apparently (3/4" deep), as the port. I know how to use winISD, can I design the horn to give more like 50HZ, or should I stick with 80hz, and just use my 2245 sub for the lows?
5th
While the Truextent diaphragms sound like they improve the harshness of the AL diaphragm, can I have the current Al diaphragms aquaplased to help improve the harshness?
As a point I've already got a dBX driverack 260 to use to set the crossovers, as well as setting the time delay to time align the horn and the woofer.
6th
However, is there a link where I can go learn the needed principles and math to determine how much time alignment is needed? (or will the driverack do all that as I use it to setup the speakers after building them??
I'm sure there will be more questions as I start this new project to redo the front center, left and right with these cabinets.
Or after saying all that, does someone have a better idea to follow (short of saying Chuck all those older parts for what you can get; and then spend major money on all new stuff).
I'm old school, so the idea of using all these drivers I acquired from the Chicago Museum of Science and Industry is just too much fun to pass up, as I recreate their pre-IMAX theater over my garage in my bonus room.