I heard somewhere that computer soundcard can't output high current. That is why computer speaker has amplifier inside them and require some external power to power up the amplifier.
But what about headphone? I have a headphone that is around 8 ohm impedance (tested it with my multimeter). When i plug it in my computer, it work, why? (I mean plug it directly into my soundcard) I mean, these are normal headphone, with no external power and amplification.
Can i break my computer by doing so?
Onboard soundcard from my Asrock Fatal1ty professionnal Z77.
Im trying to understand how speaker/amplificator work in order to make some sound using an microcontroller.