18 btl, ported or bandpass?

[elastic 1]

i just planned to put my 18 btl in a 6th order bandpass (60 hz / 30 hz tuning) and i already got the wood sawed too.

ive never tried a bp yet so i thought it would be nice to give it a chance.

what do you think?

is it better to put the btl in a big ported box or go with the 6 th order.

i currently have a 5 cft ported box @ 30 hz but i want to increase efficiency and loudness of the box. amp is a bxi 2610.

Edited February 23, 2010 by elastic

[jcarter1885 995]

Put that sub in a bigger enclosure if your gonna stick with 5ft^3 then you should of got the 15" instead.

[Duran 387]

5^3' is minimum for an 18" BTL, if you want louder build a bigger enclosure.

[elastic 1]

yes thats what i know too.

the question is either a 6th order bandpass (~7 cft net volume) or a ported box (~7 cft net volume).

[Duran 387]

Bandpass will yeild more output, they are very hard to get to sound right though.

[elastic 1]

i designed one chamber 2,5 cft @ 60 hz and the other one 4,8 cft @ 30 hz.

ive never build a bp before, do you think this will work fine?

[Duran 387]

That looks good as far as I'm concerned, don't forget port area too.

[elastic 1]

port area is 92 inches² and 45 inches ².

[KU40 173]

Just try it out. No harm in experimenting. At least you'll have more knowledge afterwards if it doesn't work out quite right. But if it does, then you'll have both more knowledge and a good working result.

[K2rush7 0]

bandpass it man i got a BTL 15 in a 6th order hit a 147 at 2 ohms last weekend they get loud and if done right sound VERY good!!!

[Duran 387]

bandpass it man i got a BTL 15 in a 6th order hit a 147 at 2 ohms last weekend they get loud and if done right sound VERY good!!!

What does impedance have to do with that statement?

[elastic 1]

nothing lol

what speaker wire should i use?

in my current box i have 8 awg to each coil. does 12 awg also work well?

[jcarter1885 995]

nothing lol

what speaker wire should i use?

in my current box i have 8 awg to each coil. does 12 awg also work well?

12 will work fine, 8 is overkill on subwoofers in my opinion (to some competitors they may say 8 is better if your chasing tenths on the meter).

[Julian 641]

If it's not "dead on balls" accurate it will sound bad

[elastic 1]

If it's not "dead on balls" accurate it will sound bad

why will it sound bad?

[Duran 387]

If it's not "dead on balls" accurate it will sound bad

why will it sound bad?

Because with a 6th order there is NO room for error.

[elastic 1]

If it's not "dead on balls" accurate it will sound bad

why will it sound bad?

Because with a 6th order there is NO room for error.

oh i reffered it to the 8 awg cable xD

hope that the 6 th order will be right. its my first bp...

[///M5 2,833]

If it's not "dead on balls" accurate it will sound bad

why will it sound bad?

Because with a 6th order there is NO room for error.

oh i reffered it to the 8 awg cable xD

hope that the 6 th order will be right. its my first bp...

How many ported enclosures have you built?

*I hope it is a lot, otherwise I'd definitely recommend holding off on the BP

[elastic 1]

i have built six ported enclosures.

but i still can improve and learn alot in enclosure building.

[///M5 2,833]

If your goal is to be loud, expect that your first few attempts will not be as loud as just a ported enclosure. If you are willing to build, re-build, then re-build again perhaps you'll get there. I'd just recommend sticking to ported generically speaking for you.

[K2rush7 0]

the independance had nothing to do with the statement other than saying that it would have been even louder than that at .5 ohm and it still sounds amazing if done right

[KU40 173]

the independance had nothing to do with the statement other than saying that it would have been even louder than that at .5 ohm and it still sounds amazing if done right

impedance.

[Duran 387]

the independance had nothing to do with the statement other than saying that it would have been even louder than that at .5 ohm and it still sounds amazing if done right

impedance.