Like you, I have a lot of questions about amplifiers, but the size of wire for power and ground wires will be dictated by the power requirements of the amp. Speaker wires may also need to be heavier. A 1200 watt or a 2000 watt amp will need much heavier wires than a 200 or 400 watt unit. Check the instructions for the amp to see what is needed. You may be able to get specs on line for the unit you are considering. Hope this helps.
Gary
_________________ Surface Interval: A scuba diving term for that time between dives to relax and prepare for life's next great adventure.
Current boat: '02 FW 268 Vista Previous boat: '95 FW 190 Horizon
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