Whelen power supply and relay panel wired on a plywood board in…

Emergency-equipment electrical panel mounted on a plywood board in a car's trunk, with a bank of automotive relays, a fused distribution block and bundles of red, yellow and blue wiring in loom. A black Whelen power supply/siren amplifier with its spec label sits at right against the trunk sheet metal.

AI caption June 2007 · Photo 137 of 172