Thiele Small Parameters for fully loaded BTL's

[mjmarovi 8]

I know that posted t/s paremeters on ficaraudio.com are for the stock BTL with no options. would it be possible to get the t/s params for the common fully loaded BTL built for daily music? Just curious to see how it changes, and I know you guys will always say stick to recommended box design, but it would still help me to have the t/s params.

[///M5 2,833]

Been asked before, I doubt you'll get them but if you explain why you think it would be helpful instead of just saying it you might get closer to getting them.

[Fi Car Audio 64]

Not to be a useless PITA, but we have so many versions that we simply dont have all of them. Between stock version and a couple of variations (coupled with FEA) we tell people per application what will work vs specific TS for every combination.

BTLs in general model poorly to most people, but perform beyond expectation.

[mjmarovi 8]

the main number I want to know is the Vas difference between the stock BTL, and one with the high xmax coil, and cooling option. I heat ring really worth it for daily or no? if so, that as well. using this number in conjunction with the Fs to come up with approx. size/tuning of box I want to build.

Besides Vas and Fs, a generalization of change in the Q parameters is fine, nothing exact.

I had an amp stolen, so have had to push back a bit on when I can order the BTL's, or mayhems (another reason havent' decided yet on BTL's or mayhems), anyway, box is built into a trunk in a 4-door sedan, so it will take me some time to re-build enclosure, so wanted to get it designed now.

Scott, thank you for taking the time to reply to my post. BTW, those beefed Q's you built for me for SBN in the spring got me a 4th place trophy even with a faulty alternator, was pulling 147's on music from the trunk. (not bad on a crunch amp at 11volts) 2 15's... I was the one that called you about a possible phasing issue with the trunk. wanted to buy more product from you over the summer, but job decided not to allow that.

Edited October 19, 2009 by mjmarovi

[NDMstang65 403]

Suspension is the same on all of the BTL's..so the Vas is the same accordingly with respect to cone size...regardless of options.

[mjmarovi 8]

Suspension is the same on all of the BTL's..so the Vas is the same accordingly with respect to cone size...regardless of options.

makes sense, just wasn't really sure what all you guys did in the factory. thanks nick! Fs the same as well then?

[NDMstang65 403]

Fs swings because Qts and BL swings...more steel..little lower q and tighter tolerances...less steel..little higher q..little bit less bl etc.

The suspension is all the same..it is all done in house..but we do not change the suspensions on them as it is a 1 size fits all kind of thing.

[mjmarovi 8]

Fs swings because Qts and BL swings...more steel..little lower q and tighter tolerances...less steel..little higher q..little bit less bl etc.

The suspension is all the same..it is all done in house..but we do not change the suspensions on them as it is a 1 size fits all kind of thing.

good answer, thanks!