Underdash sub box

[Smart990]

I purchased an underdash sub box and a JL 8w3 to go in it. The 8W3 says it requires .3cuft of airspace. I drew up the sub box in autocad and calculated the internal volume and found it to be shy of the required .3cuft requirement. The internal volume was just over .2cuft but once you calculate in the displacement of the woofer it makes it almost exactly .2cuft. I proceeded to then build my own .3cuft box, just your typical cube box just to see how it sounded compaired to the purchased underdash sub box. What I found was the .3cuft box was much better sounding, both cleaner and louder. I'm not posting this to encourage people to stop buying the underdash sub boxes, but for someone to come up with a way to make an underdash sub box that has an internal volume of .3cuft for an 8" sub. If someone were to do this I would definitly purchase one from them. Don't get me wrong the underdash sub box I purchased sounds good but there is still more potential there.

[SunDiego]

Why bother selling a box/sub combo if it isn't even optimized for the sub being included with it? Thanks for the info!

[Turbo42]

Good info well done. Maybe someone will see this and redue there's

[cubefx]

You can get this Pioneer shallow sub

Recommended enclosure is only 0.15-0.5 cu/ft
Because subwoofer is only 2 1/2" deep, I think it is might be possible to build very shallow box and fit it under the one of the seats.

Also it is not very expensive and can be found online as low as $70

[Napoleon12]

Originally Posted by cubefx

You can get this Pioneer shallow sub

Recommended enclosure is only 0.15-0.5 cu/ft
Because subwoofer is only 2 1/2" deep, I think it is might be possible to build very shallow box and fit it under the one of the seats.

Also it is not very expensive and can be found online as low as $70

great sub. sounds awesome. if you waned to you could do a 10 underdash. i have not seen nor used the underdash sub for the online stores. hit or miss from what i have read. they come with a JL. great product. only thing i will say its up to you what kind of sub to use. my OPINION is they make more money on jl. great product hands down. you pay for qulity, but there are many options out there that will sound good.

[Smart990]

I searched for an 8" sub that can operate in a box of .2cuft and found only two that were decent. Rockford fosgate P2d28 and the pioneer shallow mount. I ordered the Rockford fosgate because I prefer the standard sub over a shallow mount. I really like JL but the 8w3v3 doesn't work well for the underdash sub box I purchased. I hope the Rockford sounds better!

[sato7]

let us know the outcome.. We are all sitting on the edge of our seats here... waiting for an optimal option.

[vpkb1998]

I just ordered a CDT EF-80 $60.00 and an underdash box. I don't know when I'll have time to install them, but hopefully soon. Will let you guys know how this combo sounds.

[smartt]

Any update on this stuff? Question is to build own box to get close to the .3 subs space needed or buy the prebuilt and buy the .23 subwoofer to meet the needs of the subwoofer?

[roadking40]

You can remove the magnet cover on the P2. This is purely cosmetic and it will allow you to gain useable enclosure volume.