Ohm's Law and Setting Amp Gain

[sqcomp]

IMHO Tolm is a little off...Perhaps it's because I'm writing this early in the morning:

"Most amplifiers have a special circuit (switching power supply) to boost the available battery/charging system voltage to a higher voltage. The higher voltage developed in the amplifier's internal switching power supply will allow the audio output voltage swing to be greater. This allows the amplifier to produce more power into the speakers connected to the amplifier's output terminals."

This is where we need to see the clamped draw on the amp's outputs.

[CTScott]

Originally Posted by sqcomp

IMHO Tolm is a little off...Perhaps it's because I'm writing this early in the morning:

"Most amplifiers have a special circuit (switching power supply) to boost the available battery/charging system voltage to a higher voltage. The higher voltage developed in the amplifier's internal switching power supply will allow the audio output voltage swing to be greater. This allows the amplifier to produce more power into the speakers connected to the amplifier's output terminals."

This is where we need to see the clamped draw on the amp's outputs.

Actually he is correct. You are looking at the output side of the amplifier, but power out can not be greater than power in. So, if your output is 600 Watts at 36 volts, then the input power to the amplifier must be 600+ Watts at battery voltage (13.x to 14.x).

If an amp is 80% efficient then 600 Watts of output requires 720 Watts of input power to produce that output, which at 13.5 volts equals 53.3 Amps.