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BTL parameter help


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Here is the parameters of the btl 18 that FI has on their website. Can anyone tell me what the options were on this sub that was tested for parameters (cooling? high xmax coil ect?). Thinking about buying two and doing a T-Line. Whatever options are on this sub is perfect for the application I want to use it in.

BTL18

DUAL 1 | DUAL 2

Fs: 31.9 Hz | 31.1 Hz

Re: 0.7 Ohms/coil | 1.4 Ohms/coil

Qms: 6.26 | 6.42

Qes: .26 | .24

Qts: .24 | .023

Mms: 313g | 329g

Sd: 1210cm^2 | 1210cm^2

Vas: 163.1 l | 163.1 l

Spl: 94.9dB 1W/1m | 94.9dB 1W/1m

Bl: 18.3 N/A | 27.2 N/A

Xmax: 28mm * | 28mm *

Rms: 2000W * | 2000W *

Sealed box: N/A cuft | N/A cuft

Ported box: 5-10cuft | 5-10cuft

Sub OD: 18.500” | 18.500”

Cut ID: 16.750” | 16.750”

Mounting depth: 10.250” | 10.250”

Displacement: 0.26cuft | 0.26cuft

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a t-line is not just a big ported box

justin smith

1996 mercury grand marquis

20'' bentchi b7 lexani n3000 245/35/20

cactus 5kw at 1ohm dcr(beast)

2 18'' btl's in a 14.15^ft wall tuned to 35hz with 210'' of port

kicker zx650.4

componets in still the works

200amp motorcraft alt

xs power d3100 (beast)

kenwood ddx512 h.u.

you mean my EX? the one I dumped? just remember every time you kiss her that i used to cum in her mouth

and BTW your girl just called me....

pure pwnage

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you cant tune a t-line to w/e freq you want. it has to be the Fs of the sub.

you will NOT fit 2 18's in a t-line in your truck. im 95% sure about it. and you cant really throw that much power to a woofer. 4000rms is alot for a woofer, especially in a t-line

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hes putting the 4500rms on 2 woofers so they would be seeing about 2250 each

im not gone say it cant or it can. i just want to see it done with a video and ill be happy. good luck with your build and keep us posted on the progress.

2 AQ 10'' HDC3 copper subs

1 3500d AQ amp

146.3db on TL with stock electrical in single cab truck at 32hz

RESULT: 1st place at comp, 3rd overall out of 20 cars

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a t-line is not just a big ported box

I understand this (i assumed that you could make the line anything ABOVE Fs. I was wrong)

you cant tune a t-line to w/e freq you want. it has to be the Fs of the sub.

you will NOT fit 2 18's in a t-line in your truck. im 95% sure about it. and you cant really throw that much power to a woofer. 4000rms is alot for a woofer, especially in a t-line

Ok again i was wrong about the Fs. And now remeasuring everything it will have to be 2 15s. I need help know what the parameters will be given certain "options". If you cant help with this your are you cluttering my thread? And it was 1 4500 for 2 subs not 1 Kthxbye

im not gone say it cant or it can. i just want to see it done with a video and ill be happy. good luck with your build and keep us posted on the progress.

Thanks for the help, and now knowing that I cant tune above Fs I only have room for 2 15s. But again this is temp, just before i build my wall

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