Sub box design question, rear facing ports?

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Richard G. Pecoraro - 24 Apr 2004 20:34 GMT

After a 2 year hiatus (brain surgery) I'm now able to operate power tools,
and am designing a ported box for 2 12" Rockford DVCs.

I noticed, playing with the store-bought sealed boxes, that rear facing
yields deeper bass, but the forward facing seems more 'connected' to the
rest of the sound...bass drum pedal hits seem more in sync.

Anyway, my question is, why can't I design a box with forward facing woofers
and rear facing ports, like in home speakers usually are.

Has anyone tried this, or why doesn't it work?

Any help on this will be greatly appreciated,
Rich

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Kevin McMurtrie - 25 Apr 2004 04:20 GMT

> After a 2 year hiatus (brain surgery) I'm now able to operate power tools,
> and am designing a ported box for 2 12" Rockford DVCs.
[quoted text clipped - 10 lines]
> Any help on this will be greatly appreciated,
> Rich

They're sometimes rear-facing so that unwanted noises coming out the
port from inside the cabinet (wind noise, echoes, rattles) are aimed
away from the listener. The downside is that two sides of the speaker
box need to have open space around them.

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JP - 26 Apr 2004 05:17 GMT

I have the same problem, mainly because of the trunk space left. I saw this
car similar to mine, and this guy had the subs all the way to the front of
the trunk, right behind his rear seat facing forward. It looked neat coz he
had plexyglass box, and had plenty of space, but I bet that mine pound a lot
harder than his. I tried that to see the difference on the bass strength,
and yes, it diminished. The best position for a heart pounding bass is all
the way to the back of the trunk facing back, about 8-10 in. from the wall.
I wish there was a way to get a better configuration and still get the same
results.

> > After a 2 year hiatus (brain surgery) I'm now able to operate power tools,
> > and am designing a ported box for 2 12" Rockford DVCs.
[quoted text clipped - 15 lines]
> away from the listener. The downside is that two sides of the speaker
> box need to have open space around them.

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