Pi-aligned line array?

Can anyone spell out for me (or point me to a good post or written source) how to compute box volume and port tuning for a line array of identical woofers in a bass-reflex box, where the Thiele-Small parameters of a single woofer are known? I presume there's a fairly straightforward way of pretending the woofer array is one big woofer?
Thanks.
-uW

Follow Ups:

Re: Pi-aligned line array? - bmar 09:54:09 12/17/02 (0)
Thanks for all the info / cautions! <nt> - uW 07:15:30 12/17/02 (0)
Re: Pi-aligned line array? - mollecon 03:28:22 12/17/02 (0)
Re: Pi-aligned line array? - Wayne Parham 22:37:40 12/16/02 (9)
- a pair of 15's - Sam P. 06:22:08 12/17/02 (8)
  - uW, re-read this part from Sam P! - mikebake 06:56:57 12/17/02 (7)
    - Nice Headphones - D. Kurfman 18:58:33 12/17/02 (1)
      - Re: Nice Headphones - mikebake 20:19:29 12/17/02 (0)
    - how far apart - Sam P. 08:51:45 12/17/02 (4)
      - Re: how far apart - mikebake 09:33:56 12/17/02 (3)
        
        bet they cross that low - Sam P. 10:28:05 12/17/02 (2)
        
        Re: bet they cross that low - bmar 15:21:40 12/17/02 (0)
        
        Re: bet they cross that low - mikebake 11:27:15 12/17/02 (0)