Speaking only from the perspective of a 2WD westfalia with batteries in their
rightful rearward place, I have built a subwoofer sealed box enclosure with 8
inch Pioneer driver under the driver's seat. It is made of MD particle board
and the speaker mounts through the center of the seat swivel mechanism. On
the passenger side, I have mounted my primary 4-channel amplifier ~ 1200
watts with fan cooling. The rear of the passenger compartment is encased with
a cut-down rubber battery box for the storage of tools and loose parts.
Details in the archives and pictures available on request.

Frank Grunthaner