Example, a mono block that pushes 1000 watts rms needs a 4 gauge power cable, but the speaker cable that actually transfers power to the woofer is much smaller.
In: Engineering
1. the power may be transferred at a higher voltage, therefore reducing current losses (I^2 * R).
2. the amplifier will burn some power. different amplifier have different efficiencies. it might take 1kW to push out 150W at the other end if it was only 15% efficient.
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