bandpass box or sealed?

[T2BLADE]

looking to put in two alpine 10" subs

anyone got pros/cons of using a bandpass versus a sealed box?

i had an mtx bandpass previously and was happy with the deepness of sound

but some have said ill obtain better and tighter sounf with a sealed box

ideas/comments

Thanx

[T2BLADE]

HELP!!

[big_sur]

low power=bandpass high power=sealed, eventually you get a farting sound out of a bandpass if you move too much air through it

[T2BLADE]

thanx!!

[MattE30]

Definatly sealed. Please tell me they arent alipne type e or s....(r would be fine i suppose)

[T2BLADE]

actually they are the alpine type X

[dieselnuts]

what does alpine recommend? it depends on what kind of bass you want. personally, i just power the crap out of mine in sealed boxes.

[karrbass4life]

Bandpass are a combination of a ported and sealed box. I own two 12's in a Bandpass box and they hit harder then my friend who has twice as many more watts and a sealed box. But i will give you a warning if you choose bandpass you want to kinda have some nice High's and mid's because subs in a bandpass box cancel out more frequences than other boxes. I will get you a full guide soon of how to choose a box.

[karrbass4life]

Subwoofer Enclosures

The type of bass you get from your component subwoofer doesn't depend on the woofer alone. You'll need a strong, tightly-constructed enclosure, such the Q-Logic boxes offered by Crutchfield, for optimum subwoofer performance. Speakers without an enclosure can't deliver full bass because the sound from the back of the speaker can cancel out some low frequencies emanating from the front of the speaker.

Using our box-building accessories, you might choose to construct your own box to create the enclosure size that you want. However, unless you have excellent craftsman skills and a solid understanding of enclosure volumes and other technical terms, you're better off purchasing a convenient, professional-looking pre-made enclosure.

Different types of boxes will produce different types of bass:

Sealed boxes: For deep, precise bass
A sealed box is an airtight enclosure housing your subwoofer. A sealed box is best for any music that demands tight, accurate bass. Expect flat response (not excessively boomy), deep bass extension, and excellent power handling. Since a sealed enclosure tends to require more power than a ported box, use an amplifier with ample wattage for optimum performance.

Ported boxes: For forceful bass
Ported boxes use a vent (called a port) to reinforce low bass response. You get more output than you would from a sealed box at any given amplifier wattage. Some people prefer the sound of ported boxes for rock, heavy metal, or any hard-driving music. Ported boxes can deliver deeper bass than sealed boxes, though they need to be much larger than sealed enclosures to accomplish that.

The Q-Logic ported boxes we offer come with pre-cut port holes (sealed with a plastic port plug) and trimmable ports.

Bandpass boxes: Maximum slam!
Bandpass boxes are a special type of ported box designed for maximum slam. The woofer is mounted inside a dual-chambered box (one chamber sealed, the other ported), with the sound waves emerging from the ported side. The sound that comes out of the port is extra loud within a narrow frequency range.

Because bandpass boxes are super efficient within that range, they tend to boom. Their aggressive sound is great for rap, reggae, and hard rock. Not all subwoofers work well in bandpass boxes, though; consult our product information or call a Product Advisor to be sure.

Choosing an enclosure for your subwoofer
Q-Logic's convenient enclosure ratings are being adopted by more and more manufacturers. Here's how it works — pick a subwoofer from Crutchfield's wide selection, and you'll notice a recommendation for "Box Type" listed in the sub's Key Features (based on the manufacturer's air space recommendations). We check every sub for fit, so if you want to see boxes that work with the sub you selected, click on "Recommended Accessories." If you don't see a particular box listed for your sub (or if no box is listed), call a Product Advisor at 1-888-955-6000 to check out your options.

Q-Logic Box Types

Type 1: Small, sealed box — produces tight, focused bass. The most accurate bass response of all box types, but requires more power.
Type 2: Medium box — comes equipped with pre-cut port hole(s), port hole plug(s), and ports, so it can be used for either sealed or ported applications. More efficient than a sealed box, so you get more bass SPL with a little less accuracy.
Type 3: Large Box — comes equipped with pre-cut port hole(s), port hole plug(s), and ports, so it can be used for either sealed or ported applications. Much more efficient than a sealed box, so you get more boom for your buck, but with less accuracy.
Type 4: Bandpass Box — sealed/ported hybrid. Highly efficient, but with less accuracy.


Free-air subwoofers
A free-air system consists of woofers mounted to a board attached to the rear deck or placed in the trunk against the rear seat. The trunk of the car acts as an enclosure which houses the subwoofer and isolates sound from the back of the speaker, solving the sound cancellation problem of subs without an enclosure.

Free-air systems save space and have flat frequency response. The woofer must be specifically designed for free-air use. The lack of a box makes them more convenient to install, but their power handling levels are usually much lower than their boxed counterparts.

(If your wondering where I got this, it came from Crutchfield)

And you picked up a great pair of subs. From what I have read the Alpine Type X subwoofers are really nice, and you get a lot of bang (or thump) for the buck.