View Full Version : box size per Specs's

05-19-2009, 09:02 PM
Guys can you tell what size box a subwoofer needs per its specs"? Like these

RMS Power Handling : 450 Watts
Peak Power Handling : 900 Watts
Frequency Response : 20Hz - 500Hz
Sensitivity : 89.9dB @ 1W/1M
Mounting Depth : 5.75" (133mm)
Cut-Out Diameter : 11.37" (289mm)

Fs : 29Hz
Qms : 6.1
Vas : (Liters) 76.4
Qms : 6.1
Qes : .43
Qts : .40
Qtc : .70
Nominal Imp (Ohms) : 4 ohms + 4 ohms
SPL 1w/1m (dB) : 89.9
SPL (2.83V/1m) : 95.1
X-Max (mm) one way : 9
Pe - RMS : 450 Watts
Pe - Maximum : 900 Watts

05-19-2009, 09:41 PM
Well, it'd be better if we knew the manufacturer and make of the woofer in question, usually it's told on the website. But seeing that it's a 12" woofer, anywhere in the range of 1.25-2 cubic feet should satisfy it generally if you're looking for a ported enclosure. 1 cube even would be a decent choice if you're looking to go sealed, although you could go bigger too, it's pretty hard to F up a sealed box, no matter what woofer.

05-19-2009, 09:53 PM
its the old school PB es12d Evolution woofers. I cant find anything on them

05-19-2009, 10:04 PM
Ahh I see why. It's hard to find info on PB's new stuff, I can only imagine their old merchandise.:laugh: But like I said, there's generally a happy medium for "most" 12" woofers alike. Obviously each one is different, but somewhere in that margin will sound good.

05-19-2009, 10:49 PM
any idea's on a ported box. I have about 700 watts to run to the pair. May face the subs up and fire the port to the front or rear.

05-19-2009, 11:25 PM
Why subs up in a trunk car. I'm assuming it's going in the ford fusion in sig? I would say subs and port facing back for a trunk car unless you want to seal them off facing forward, but then you can't play it when you have people in the car and the seats are up.

I'd say something like 1.5-1.75 cubes per sub with 40-50 sq. in of port area tuned to whatever your preference is.