A relatively simple work bench mod that also serves other purposes.
An FJammer that you can't sell because everyone else seems to already have oneReverse wire harnessUniversal FM antenna
Some wire and crimp on/wire nut/ solder connections.
Some old 4 ohm speakers, two is fine, but if you've got 4, the FJammer can handle itComputer power supply
You'll use the computer power supply to provide 12v DC power for the FJammer. The beauty of a power supply is that it's also great for bench testing other 12v auto accessories. I use mine to test all my lights and LEDs before hooking them to the truck. It had enough power to fire up my HIDs without a problem, so most other items shouldn't be a problem either.
Cut one of the 12v connectors off the power supply wiring and splice a 16 gauge or greater wire to the positive and negative wires.
Splice the other end of your wire to the reverse wiring harness. The negative wire should be spliced to the ground of the harness. The positive wire should be spliced to both the accessory and power wires of the harness.
On your wiring harness, you'll also have two gray, two white, two green and two purple wires. These are the wires for your speakers. White/Gray are the front and Green/Purple are the rear. Again, splice some wire to the harness, and run the wire to your speakers. 1 speaker, 2, 3 or 4, it's up to you.
Plug the reverse harness in to your FJammer and also plug in your antenna. Make sure the power supply is on, and turn the FJammer on. Instant music and CD player with aux input for your workshop!
I used two basic L-brackets to mount my FJammer to my bench, but there are lots of options.