I note that you indicate that the amplifier runs on AC, in which case directly connecting it up to a regular battery would not work.
You have two options:
- Use a battery and feed it in into an inverter. Use the inverter output to power the device as you would normally.
- I don't know much about high-power audio amplifiers, which this seems to be given the two ?audio? connectors on the input side, but it might be the case that this amplifier would just take the power you feed it and make it into DC anyway. If so, you can bypass the regular power inputs and feed it the kind of power that it would generate internally. X2.1-3A is actually a designator for a power jack. It does not seem to be populated, though it is kinda hard to tell from the picture. Might want to look into where that leads.
Either way, that's a lot of heatsinking. Make sure your inverter/battery can handle the loads you are giving them.
Thanks!
You mean I can connect battery wire directly at it and it will work as usual?