Are there any T/S perams for any FI subs?

[Jay-C76 333]

I've been looking for T/S perams for the FI BTL 18.

Searching to no avail I need some help.

The reason I need the numbers is to plug them into Termpak so I can

design an enclosure for a forum buddy.

Any help would be very much appreciated.

I need the following:

fs (in hz)

Qts

Vas (in cu.ft.)

Xmax (in inches)

znom (depends on coil config. I am aware)

Pe (rms watts)

Spl (in db @ 1w/1m)

[ssh 924]

Which BTL? What year?

[Jay-C76 333]

Well......Actually the design is for 2~18" DC XL

Was told to just use the BTL perams because the numbers I need apparently do not exist.

Upon searching the FI sites, I can't find anything.

[Julian 641]

Why nit get their ts params?

[Jay-C76 333]

I tried, was told by "Rusty" the missing numbers I need don't exist.

I need the VAS & SPL to fill in the blanks for the actual XL.

He told us to use the BTL perams.

[Julian 641]

Pft is all I have to say lol

[Jay-C76 333]

It seems like T/S perams or "specs" are taboo for people to talk about.

[Mac N Cheese 90]

Generation 2/ UFO style magnets

[B7L|BL4Z3R 4]

Kinda blows my mind how we call rusty and get no where.

[Jay-C76 333]

Sean had a good point, he says most spl subs don't have ts parameters because graphing large motor-ed subs gives weird graphs

[B7L|BL4Z3R 4]

So what now?

[shizzzon 461]

Do what Yoda says-

Do Or Do Not

There Is No Try.

[Julian 641]

Sean had a good point, he says most spl subs don't have ts parameters because graphing large motor-ed subs gives weird graphs

then go off of DC's suggested enclosure sizes.

[Jay-C76 333]

Or like MJ.....Just beat it!

[Impious 1,476]

I tried, was told by "Rusty" the missing numbers I need don't exist.

I need the VAS & SPL to fill in the blanks for the actual XL.

He told us to use the BTL perams.

What parameters do you have for the XL ?

Depending on what parameters you have it might be possible to calculate out the Vas & sensitivity.

[95Honda 486]

If you are going to go through the trouble of modeling, it is a complete waste of time to use the T/S parameters of another sub, no matter who tells you....

Also, saying a sub is "special" and doesn't model well is only true if you don't know how to use your modeling software....

[Aaron Clinton 2,372]

Wait, an outsourced version of an older design is supposed to use the same parameters?

[Sir-Lancelot 216]

Wait, an outsourced version of an older design is supposed to use the same parameters?

Thats what I was thinking.

More like wishful thinking me thinks. lol

[Jay-C76 333]

I tried, was told by "Rusty" the missing numbers I need don't exist.

I need the VAS & SPL to fill in the blanks for the actual XL.

He told us to use the BTL perams.

What parameters do you have for the XL ?

Depending on what parameters you have it might be possible to calculate out the Vas & sensitivity.

All I had to work with was on DC's site and what Rusty told Mac N Cheese

[Jay-C76 333]

If you are going to go through the trouble of modeling, it is a complete waste of time to use the T/S parameters of another sub, no matter who tells you....

I understand that,

this is why I was leery to try to use another drivers specs.

I know all subs are different and have their own specs kinda like "DNA" for the sub.

It seems like the T/S Parameters are getting harder and harder to find for modeling sub enclosures.

[Quentin Jarrell 671]

If you aren't trying to pinch pennies and want dead on specs google Redrock Acoustics. Patrick can give you full small and large t/s parameters with BL, THD, thermal, inductance, and a few more graphs off the top of my head for around 125 bucks.

[Jay-C76 333]

If you aren't trying to pinch pennies and want dead on specs google Redrock Acoustics. Patrick can give you full small and large t/s parameters with BL, THD, thermal, inductance, and a few more graphs off the top of my head for around 125 bucks.

Good info.

I +1 ya on that for the info share!

[Quentin Jarrell 671]

But as said before if the subs have more than 20-25 BL T/S parameters will be worthless to you as they will not model correctly. Typically high BL subs will generate a peak at tuning frequency will a shallow knee below tuning.

[Aaron Clinton 2,372]

Wait, an outsourced version of an older design is supposed to use the same parameters?

Thats what I was thinking.

More like wishful thinking me thinks. lol

Why does logic always get in my way?

[Quentin Jarrell 671]

If you aren't trying to pinch pennies and want dead on specs google Redrock Acoustics. Patrick can give you full small and large t/s parameters with BL, THD, thermal, inductance, and a few more graphs off the top of my head for around 125 bucks.

Good info.

I +1 ya on that for the info share!

He's a super cool dude and was personally recommended by Dr. Klippel as "the authority" for testing in the U.S. He has one of the newest Klippel testing equipment that they produce.