a Ciare NDH15-4S in a 90L vented could work well to 40Hz and is as efficient as the JBL. I know who use a similar (95L) ported cab with this driver as sub for a smaller p.a. system.
Ciare NDH15-4S - 15" Subwoofer
But normally we design a box for a speaker, not reverse.
What is the usage? Pa, home hifi, etc? How low and how loud, and what amplification/ crossover approach? Glenn.
What is the usage? Pa, home hifi, etc? How low and how loud, and what amplification/ crossover approach? Glenn.
Eminence Buyout 15" subwoofer
It may be worth your time to check with Erich, or Matt to see what this driver would do in your enclosure volume. 4 cubic feet has been most recommended, but if you are flexible on the deepest extension, for the cost, it may be usable. Glenn.