Originally Posted by jtsmith55
Just so everyone understands, I am basically ignorant when it comes to wiring in general......I've tried connecting wires to the amp first and then to the battery, and again, there are sparks....
First off, a link to the devices you're using would be helpful. I'm seeing two devices on your sub?
The sparks are to be expected. That's the reason for connecting jumper cables
hot-to-hot then to ground somewhere away from the battery, so sparks don't ignite hydrogen gas, if present. A 12V high-current source will draw an arc due to the current. Voltage just varies the distance the arc will jump.
I would start with a volt-ohm meter (VOM) so you can test the load of the amp before connecting the battery. Assumning the amp's not open or shorted, I would then connect things up, but with a fuse in the circuit, just in case (plan to keep the fuse). If the sparks bother you, use the switch. For safety, I'd recommend a double-pole switch, so you switch both hot and ground lines. Make it double throw as well (aka DPDT) and you can flip between charging and playing.
The VOM has other uses. A good tool....
- check speaker continuity
- check amp function (measure AC voltage; 1W is 1-2V)
- measure battery charge level.