Old School Sub Box...

Purple RS · Post by **Purple RS** » Wed Jan 14, 2009 7:52 pm

A friend of mine is rebuilding his daily driver pickup truck and has just installed this sub enclosure. He thought it to be an interesting design (as do I) made by Polk Audio. He says it's been through a few amplifiers, two trucks and a flood. I don't know any specs, but I thought I'd try to find some info on it and here seemed to be the most likely place. He says the drivers are 4 6X9 speakers.

It mounts nicely to the back of the cab along with the amp..

colemanyoungerinalaska · Thu Jan 15, 2009 12:42 am

a buddy of mine has one of those but it has a plexiglass window
it actually sounds pretty good too

Ryan from Ohio · Post by **Ryan from Ohio** » Thu Jan 15, 2009 3:55 am

Looks like its missing a cover.

Isobarik 4th order bandpass.

Bwcad1 · Post by **Bwcad1** » Thu Jan 15, 2009 5:22 am

Yup 4th order iso

loudwagon15s · Post by **loudwagon15s** » Thu Jan 15, 2009 9:12 am

i'm really curious how this would sound or how loud it would get?

Purple RS · Post by **Purple RS** » Thu Jan 15, 2009 9:50 am

Ryan from Ohio wrote:Looks like its missing a cover.
Isobarik 4th order bandpass.

I'm sure he's got the cover, just removed it to show construction.

Bwcad1 · Post by **Bwcad1** » Thu Jan 15, 2009 9:55 am

loudwagon15s wrote:i'm really curious how this would sound or how loud it would get?

Its probably as loud as a normal ported box. the chambers are not the correct proportions to increase the efficency.

Ryan from Ohio · Post by **Ryan from Ohio** » Thu Jan 15, 2009 9:57 am

loudwagon15s wrote:i'm really curious how this would sound or how loud it would get?

From all my readings, running iso wont yield you and more volume. It just allows you to run more speakers and cut the box volume in half.

cargodz · Post by **cargodz** » Thu Jan 15, 2009 2:51 pm

After a being in a flood and from the conditions of the looks of the 6x9"s I'd think it's be lucky to even work

It is a nice lil space saving design though.

Tim · Post by **Tim** » Thu Jan 15, 2009 6:09 pm

Ryan from Ohio wrote:From all my readings, running iso wont yield you and more volume. It just allows you to run more speakers and cut the box volume in half.

That was the cool thing about isobaric. But it never really took off. Back in the 90's I always wanted to experiment with the iso design and never did.

the best I remeber polk or infinity did a iso box that held 2 10's I beleive. One inside the box and one on the outside mounted face to face. I liked the thoughts behind the concept, that was about it though.

Tim