when we talk about the output power of an audio amp, say 20W, what power are we talking about?
i see 3 kinds of numbers in LTspice:-
1) by pointing the cursor at a net or device, i can get DC voltage and current readings, and therefore a power reading.
2) when pointing the finger cursor at a device, i can also get a "power dissipation" reading, is this only a DC power reading?
3) i can also get LTspice to display AC voltage and current waves of the output node, measure their peak values, and get an AC peak to peak power reading.
which of these is taken as the output power of an audio power amp per our convention, or at least the base for such a rating?
i'm not able to verify the LTspice simulated result on power, or anything, by measuring the actual built circuit, i only have a multimeter. this multimeter can measure down to 2mA, but manual says there needs to be 2V present, otherwise it couldn't measure anything. so i'm getting nothing, zero's only. how do you get 2V between two points for current measuring, i have no idea what that means. so do i have any hope here, measuring the actual output power, or current, of an audio amp circuit with just a multimeter?
thank you for all comments and helps!
i see 3 kinds of numbers in LTspice:-
1) by pointing the cursor at a net or device, i can get DC voltage and current readings, and therefore a power reading.
2) when pointing the finger cursor at a device, i can also get a "power dissipation" reading, is this only a DC power reading?
3) i can also get LTspice to display AC voltage and current waves of the output node, measure their peak values, and get an AC peak to peak power reading.
which of these is taken as the output power of an audio power amp per our convention, or at least the base for such a rating?
i'm not able to verify the LTspice simulated result on power, or anything, by measuring the actual built circuit, i only have a multimeter. this multimeter can measure down to 2mA, but manual says there needs to be 2V present, otherwise it couldn't measure anything. so i'm getting nothing, zero's only. how do you get 2V between two points for current measuring, i have no idea what that means. so do i have any hope here, measuring the actual output power, or current, of an audio amp circuit with just a multimeter?
thank you for all comments and helps!