sub question

[mightytexn]

Just wondering why people put subs in boxes "backwards" with the magnetic sticking up out of the box, and the face of the sub facing inwards? Do they hit harder that way, do some people think it looks better, or what?

[branman_crx_guy]

Well, dont get all excited and try turning you sub around, cuz that wont be good for anything. The reason people have it like that is because its a special kind of box, called a Bandpass box. I don't know a whole lot about em, I think it has a lot to do with looks, cuz u can like stick some neon in there or tie the magnet to the hatch so it hangs in the air, stuff like that (i wouldnt recommend either, mostly the second one). I dont really know if hits harder than a regular sub, but its still good I know that much. Hope this helps, and if it turns out i'm a complete moron and everything i said was wrong, someone plz lemme know cuz i hate gettin/givin bad info.

[91EF3ZC]

it depends on how many drivers are being used. I my self have a set up like that. I have two 10" speakers "clamshelled"together and it's called "ISOBARIC" box. Not a band pass box. a band pass box has two chambers in it and is ported. Like a box with a plexiglass window in front of it, and the subs are mounted inside there.
when you load two subs like that it alows you to put twice the driver and twice the power in the same space as one driver. This is also why KICKER developed it's SOLO-BARIC drivers. they clame to do the same thing with one driver. In my opinion loading two subs in a "clamshell" configuration also reduces the amount of cone noise produced by a driver. I feel this gived you a much warmer sounding and a more natural sound.
If the box is built with onlyone driver, you can grealy reduce the size of the box the driver needs, it like a 3rd of the air space needes for a conventional encloser. hope this clears up any confusion you may have had.

Mike

[mightytexn]

I wasn't planing on turning my sub around....i think it looks ass ugly that way....plus I'm not all about dB level or anything, so my sub is fine as is.

[91civicDXdude]

if you have a box thats too small for the sub you turn the sub around backwards so the volume of the sub isnt taking away from the inner volume of the box.... that way your box can be better because the sub isnt taking away from the cu/ft inside the box get it?

[91EF3ZC]

Originally posted by mightytexn
I wasn't planing on turning my sub around....i think it looks ass ugly that way....plus I'm not all about dB level or anything, so my sub is fine as is.

it is not really about db level, it is about sound quality.

[branman_crx_guy]

So children, wat have we learned today.....I learned that pretty much everything i said was bs, lol. Ohwell, it sounded good in my head. I was thinking the plexiglass box the whole time, didnt know about isobaric boxes, sorry to have misinformed you, ill be sure to spank myself tonight, cuz im a.....bad boy

[91EF3ZC]

Originally posted by branman_crx_guy
So children, wat have we learned today.....I learned that pretty much everything i said was bs, lol. Ohwell, it sounded good in my head. I was thinking the plexiglass box the whole time, didnt know about isobaric boxes, sorry to have misinformed you, ill be sure to spank myself tonight, cuz im a.....bad boy

FREAK, LMAO

[DarkImportGrey]

on competition systems when you see subs inverted, sometimes it is for looks, but there are subs that are designed for "open air" applications where they fire into a sealed chamber but have an "infinite baffle" of air behind them (no enclosure behind them).

iso-baric setups (when the two subs fire face to face out of phase with only enough distance between the cones to prevent collision), while not as efficient, can reduce cone noise if done correctly, and merely allow for more subs in a smaller area. basically on a subwoofer requiring 2 cubic feet of airspace, if you iso-barically load it with another sub of the same type it only requires one cubic foot.

you can find a lot more information about the different driver loading designs at http://www.caraudiohelp.com

and basically ALL subs designed now include the displacement of the subwoofer into the enclosure calculations so that you do not have to worry about it.

bandpass boxes, depending on the type (6th order, 8th order) simply allow for maxium efficiency of the woofer, although sound quality suffers in most applications unless the box is built to the exact specifications of the manufacturer. In most cases it isn't because people buy the prebuilt bandpass boxes at audio shops that are in no way tuned for their subwoofer application, but they can pound like hell so people like them. it is all personal preference.

[91EF3ZC]

Originally posted by DarkImportGrey
on competition systems when you see subs inverted, sometimes it is for looks, but there are subs that are designed for "open air" applications where they fire into a sealed chamber but have an "infinite baffle" of air behind them (no enclosure behind them).

iso-baric setups (when the two subs fire face to face out of phase with only enough distance between the cones to prevent collision), while not as efficient, can reduce cone noise if done correctly, and merely allow for more subs in a smaller area. basically on a subwoofer requiring 2 cubic feet of airspace, if you iso-barically load it with another sub of the same type it only requires one cubic foot.

you can find a lot more information about the different driver loading designs at http://www.caraudiohelp.com

and basically ALL subs designed now include the displacement of the subwoofer into the enclosure calculations so that you do not have to worry about it.

bandpass boxes, depending on the type (6th order, 8th order) simply allow for maxium efficiency of the woofer, although sound quality suffers in most applications unless the box is built to the exact specifications of the manufacturer. In most cases it isn't because people buy the prebuilt bandpass boxes at audio shops that are in no way tuned for their subwoofer application, but they can pound like hell so people like them. it is all personal preference.

PERFECT!-there you go. well said.