advice on a box for 3 jl 12w6s

I have 3 old school (the ones which had a protruding center cap) jl 12w6 subs that are in a crappy sealed box not chaimbered. I know that i wast getting everything i could have out of them because of the box. Im exploring options here because i have a jl 500/1 and i know that it also probably isnt enough power for all 3 subs. I was thinking of just running 1 or 2 subs and building a box. What did these subs respond best to in terms of both box design and power handling?

You'll find a pair in a ported enclosure will be louder - with more low end extention - than three in a sealed enclosure.

Given that you only have a single 500/1, here I would certainly recommend a larger enclosure because the larger enclosure with maximize efficiency - maybe 3.5cft if you have the room - with a slot port tuned to 33 ~ 35 hz - give a nice 40 - 45 hz hump.

That'll sound *real* nice.

It doesn't really matter which type of port you use - but if space isn't an issue I'd take a slotted variant - or a pair of 3" PVC pipes @ ~10 inches would do it too (I'm guesstimating the port length, you would need to calculate it precisely).

I use single large cabinets - this makes port tuning, (the bigger the box the easier the port is to construct to the proper tune) box construction, etc., much easier - not the mention the airspace is precisely divided between the woofers resulting in identical frequency response.  Manually dividing the woofers will make the Q/freq. response of each woofer slightly different - this could muddy up transients a bit - nevermind that it will make port construction a real pain.

Ive been looking for info on how to tune a box with a slotted port but am only finding stuff on tube ports.

Also aznboi, did you build the transmission line box?