hi i just picked myself up 2x 12 inch jbl gt01202d subs for my car. just wonder how big should my box be or recommended. should i have box seperated or togther. also why do you have sealed and ported. should i have the box sealed or ported? also bow to i convert the LxHxW measurement into litres. cheers

hi i just picked myself up 2x 12 inch jbl gt01202d subs for my car. just wonder how big should my box be or recommended. should i have box seperated or togther. also why do you have sealed and ported. should i have the box sealed or ported? also bow to i convert the LxHxW measurement into litres. cheers

Firstly... What kind of sound do you want from then? and how much boot space do you want to use up?

LxHxW in cm = CC volume. Then divide by 1000 to get litres.

i want some bass, but i still want to be able to have a goo clean note.hmm prolly about half my boot just past the hweel arches in my te would be good. how big should the box be

Stick with 2 sealed enclosures, (or one large one, partitioned). About 1.3-1.5cuft should do for each.

have a read of this mate before you decide whether to go ported or sealed.......it will give you a bit of insight into it:

www.ddaudio.com/dd/caraudio/enclosureInfo/portInfo.asp

it is from the Digital Designs web site....they do prefer ported box designs, so it may be a little biased, but it will help you

have a read of this mate before you decide whether to go ported or sealed.......it will give you a bit of insight into it:

www.ddaudio.com/dd/caraudio/enclosureInfo/portInfo.asp

it is from the Digital Designs web site....they do prefer ported box designs, so it may be a little biased, but it will help you

In a nutshell; Generally sealed=SQ vented=SPL (but not in every case).

Sealed - gives best response, smaller enclosure volumes, will give cleanest and deep sounding bass notes. Still ok for a bit of SPL.

Vented/ported - slower response, less sub excursion, generally requires larger enclosure volumes & alot of calculating. Best point of all, gives a high dB peak over a given range in frequency (enclosures tuning frequency), but has a big dropoff in bass below that frequency. For the best sound designed for your taste, go ported... but be prepared to put the hours in, in designing/calculating and fabrication. Unless you stick to manufacturers prefab enclosure design.

For the best sound designed for your taste, go ported... but be prepared to put the hours in, in designing/calculating and fabrication. Unless you stick to manufacturers prefab enclosure design.

Or you can simply pay an audio professional to design and build your box to specifically suit your car, amp and sub choice

hey, wherenouts would i fid the manufactures prefab design for the sub enclosures

read the manual that came with them... it will answer your questions

i just grabbed the sub box specs off there website. i just have a few questions

what does it meanwhen it mentions drivers displacement/port displacement?
also is bandpass bo, refer to have the subs facing upside down
what does the out of car curve indicating?


i have enclose the sub box specs, which is recommended by the manufactures. which may hep you guys know what i am talking about.

thanks

sub and port displacement is how much room the port and sub take up when mounted in the box, i wouldnt concern yourself with bandpass, its another kind of box design.... just build a nice simple sealed box... simple and will sound good, your obviously not to concerned with spl and all that so ported probably isnt worth the extra hassle for ya