btl 18

[mxboy77 0]

Hi, im about to order a fi btl in the next few weeks. Im deciding between a btl 15 and a btl 18. I have a hyundai elantra with a 220 amp alternator, 2 batteries and a soundstream rubicon 2500d. I listen to almost all rap and im looking for the loudest system i can build for the lows. I can only fit a 6.7 cube internal volume ported box which is 5 cubes net. I dont know which sub would be louder in this size box. But i really want the 18.

[jcarter1885 995]

Go with the 15'' since you only have enough room it

[altoncustomtech 773]

Don't skimp on it, it won't help you any at all. Last I checked 5cuft was less than Fi's lowest recommendation for the 18 so I think I'd go with the 15, or at least that's what I would do.

[altoncustomtech 773]

NVM.... just checked the website... says 4.5 to 8 cuft.... which is news to me.... I'd wait for Nick or Scott to chime in here, but apparently 5cuft will work for the 18...

[mxboy77 0]

Okay thanks guys for replying rite away

[merzbow 0]

Make absolutely sure you're accounting for the volume of internal bracing (budget up to 0.5cf), port wall, double baffle, and a properly-sized port (which means you need to decide on your desired tuning and port area now to do your calculations). If that pushes net below 5cf, go with the 15 for sure.

[Duran 387]

Our trunk is rather huge, but you won't get 5+ cubes in there without building it in the trunk, can you do that?

Also, where is your alternator from? I've been looking and had little luck.

[mxboy77 0]

alternator is from powerbastards.com and i got all these box specs from klausaudio.com i was going to have them build it to 32 hz.

[Duran 387]

The Fitzall alternator? How do you like it?

[Julian 641]

The Fitzall alternator? How do you like it?

I'd run away from that alternator seen a few guys who they said it would fit and it didn't fit.

[16K 159]

go with the 18"

[ricksi30 923]

15 in a proper box > 18 in an inadequate box.

[16K 159]

as long as he can fit a 4.5 ft3 or bigger box in the car....id say go with the 18

but i agree if you cant fit the proper box for the 18 then go with the 15..

Edited October 5, 2011 by 10000wrms

[Duran 387]

15 in a proper box > 18 in an inadequate box.

This.

[///M5 2,833]

HUGE difference between Net and Gross box size. Considering the wording of the question, I'd guess that is 5cuft gross in which there is no way in hell to make the 18 work.

[Aaron Clinton 2,372]

15 in a proper box > 18 in an inadequate box.

This.

nDeed.