someone on another forum posted about more thiele parameters then wats on the site says he wants to know everything plus motor strenth can yu guys help out

About the only spec that could potentially be useful that I don't see listed is coil inductance...the rest can be derived from the specs already there, like maximum impedance at resonance or efficiency (as opposed to sensitivity).

What is he doing that he needs other parameters?

not sure but he was using base box to design a enclosure

BB6 is crap for designing an enclosure, and he should have all the specs he needs there anyway.

well if BBP6 is crap and i heard WIN ISD is crap what should i use are you a box designer cause thats what i use for mine also but im just getting into it

I design boxes when I have to

If I really care about the results, I'll do it by hand...or if it's for a specialized design I'll talk to people who have extensive experience with that design...like Martin King's MathCAD models for transmission lines.

would a Transmission line work for 2 18s or is it just for smaller subs

im not lookin to burp maybe some bass race for my daily driver but i also have a small bronco 2 to playwith now i can use every part of this vehiicle i was thinkin a wall but im not too sure about that yet

would a Transmission line work for 2 18s or is it just for smaller subs

A true TL for 2 18's would be the size of a refrigerator, and that's with a folded line. With a straight line, you're talking about something 14 feet in height...