sub for small volume in a big box???

[rollertoaster]

I'm currently using a power accoustik fubr 12 in a 1.70ish cu/ft sealed box. I just wont hit low enough, the res freq is only like 33hz on this sub. Plus, it's old and I think it's getting a little loose. I'm looking into getting an elemental designs e5.12.

here's the specs

Qts: .40

Qes: .42

Qms: 7.00

Fs: 21.0Hz

Re: 4.5

Vas: 69L

Mms: g

Bl: 17T*m

SPL: dB

Sd: 545cm²

Xmax: 25.4mm

Voice Coil: 50mm

600w rms

I'll be running it off an eD 600w rms amp.

my box is oddly shaped and totally sealed up so I can't take it apart. Can I put something inside to decrease the volume? Do I have enough volume to port it? I'm leaning towards sealed due to the odd shape of the box I wouldn't be able to have mush port length.

here's the box

Click to read more...

 

[DBBOOM 10+ year member]

I'd port it and put in a Incriminator LI 12".

 

[rollertoaster]

nope, that won't work. I need either a single 4ohm or a dual 2 ohm. thanks for the suggestion though

 

[DBBOOM 10+ year member]

Nick can build to your VC specs.

 

[rollertoaster]

Nick can build to your VC specs.

Thanks, that's a possibility then. My only problem would be the port then, I don't have much depth to deal with in the box only about 8 inches, I'd have to do it with pvc and a elbow or something. I'm not sure I'd have good results.

What would happen if I ran the eD sub in an enclosure that is too large?? Couldn't I just put an object of high density inside the box to displace volume to bring it into spec?

 

[DBBOOM 10+ year member]

The elbow works fine, seen it done before. You could displace with a filler. As far as the eD sub goes, i've never ran one, so my opinion isn't worth $.02.

 

[rollertoaster]

The elbow works fine, seen it done before. You could displace with a filler. As far as the eD sub goes, i've never ran one, so my opinion isn't worth $.02.

Thanks, no one has run the new eD yet, it's not out yet.

 

[pawn man 10+ year member]

not sure, but it looks to small to port.

 

[rollertoaster]

not sure, but it looks to small to port.

that's what I'm thinking. It's about 1.7cu ft without driver

 

[audioholic 5,000+ posts]

1.7 cubes is too big for most 12's sealed, and on the small side for porting. Invert the sub and run external ports and you might get away with it. Otherwise yeah, just put some wood inside it to reduce the volume and stay sealed.

 

[azimuth 5,000+ posts]

a focal polyglass 33v2 13 inch sub will go in 1.25-1.45 ported. it isn't an spl sub by any means, but it sounds nice in small ported boxes. most of focals ported box subs perform in smaller boxes well.

edit: i'm wrong. the 33v1 is the ported box sub. the 33v2 is better sealed.