[darkpuppet]

how much current does the amp draw?

Depending on your CPU powersupply, you get different wattage handling capabilities between the channels.

if the amp is greater 100watts, you'll have to pony up for an expensive power supply to get reliable, not-burning-the-house-down power. You can get 120v - 12v converters (as opposed to inverters) for $30-$50, but most of those are 5-10 Amp models meant to power electric coolers, and other lightweight power options.

If you want something that'll handle > 10amp you're into the hundreds of dollars for a power converter.

Also, using a car battery charger is such a bad idea, I cannot say it enough. The thing is that battery chargers aren't meant to deliver a high current load.. you can run the amp off a car battery, but to be safe, the battery charger should not be hooked up at the same time.

It's funny, because despite the logic behind it, people still run their amps off of battery chargers or low-power converters without blowing themselves up, and I think it's because the amps they're running aren't very high power.

Just be careful and make sure that your power supply matches the amp you're hooking up.

And the fuse you put inline between the power source and the amp should be a fuse rated at what the powersupply is rated for. it will do you no good to have a monster amp fuse in, if the converter can't handle it.