An MC1458 has a peak output current of about ±25 milliamps (0.025 amps), which will give you an ac output current of 17.7 mA rms. That amount of current into an 8Ω speaker will give you 0.0025 watts of power. If you listen very, very carefully in a very quiet room you probably would be able to hear it...Hey, I was wondering if it would be possible to use a mc1458 dual op-amp to amplify a signal from an mp3 player, computer, etc, to drive two 8ohm 2watt speakers. Is it possible?
No. Calculate the peak current and voltage needed to pump 2 W RMS into 8 ohms, and you'll see that a 1458 can't make the current. You can add a booster circuit to its output stage. Search for opamp booster circuit.Hey, I was wondering if it would be possible to use a mc1458 dual op-amp to amplify a signal from an mp3 player, computer, etc, to drive two 8ohm 2watt speakers. Is it possible?
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by Luke James
by Jake Hertz
by Jake Hertz