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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: Ohm's LawPosted by Paul S on: 9/15/2022
Rick, a 12V battery must put out 50 Amps to make 600 Watts, given 100% efficiency (no system losses). So, the question is, how long can the battery do that, since that's what you're doing with it. It's of no use to have a weak battery that still puts out 12V, because the only way to get 600 Watts from 12V is at 50 Amps. Not to beat it to death, but this means the listening time from your battery is based on how long it can crank 12V at 50 Amps, not how long it can put out 12V. Obviously, if you need more wattage, you need more amperage, too, since the battery is "fixed" at 12V.
Paul SRerurn to Romy the Cat's Site