Gray truck interior with black Ford/Pioneer subwoofer box under…

Is made using a 5mm (0.20" inch) steel plate with heavy hinges attached to car's floor and heavy-duty lock. Meter at the right upper corner of the picture is a digital voltmeter that I connect in the DC outlet for monitoring battery condition when sound system is being used with motor off. It indicates when is time to start the motor for battery recharge.

Owner caption October 2003 · Photo 6 of 17