I used to carry a radio in my package car.

I had a 12 volt converter attached to it and I hooked it up to the light switch above the bulkhead door with alligator clips. This allowed me to play cassette tapes all day long.

There would be times during the day when I needed a little boost of energy and I relied on my radio to get me going so I could bust off some stops.

I kept it turned up so I could hear it (and feel it) over the diesel engine. It never failed that I would pull up to somebody’s house and they would be standing at the front door and my radio would be BLARING. I never turned it down.
 
This is one of the songs that always got me rolling in the afternoon.

Play it loud.