Any one know the volume of the rear subwoofer box?
I picked one up and thougth about slipping in some new subs, and an amp. I found all the info on connections and how to install an amp, but nothing on the box's actual volume. short of filling it with sand and measuring it, i cant find any other info.
anyone know?? anyone put in different subs and which ones ??
Did only the DSP stereo's come with the sub box? or could you get it with the regular stereo as well!??
thanx!

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2003 X5 3.0i (02/2003) sport package, Sapphire black metallic / Black Dakota Sport seats. compass mirror retrofit, trailer hitch retrofit, Prodigy P2 trailer brake controller installed, PDC retrofit, Lumbar support retrofit. heated rear seats retrofitted. Running boards retrofitted and subwoofer install in progress. 4.8is Brakes installed front and back. Bluetooth TCU installed, Rear Fog lights installed. Retrofitted reclining rear seat backs.