So I have an Asrock Z77 Extreme4 and I have it plugged into a guitar amp and I noticed that whenever I boot the computer I can hear a static sound coming from the audio ports (both onboard and the ones on the case that are hooked up to the motherboard). I can hear that static sound while my computer's on. I hooked up my amp to my roommate's computer and I hear nothing of the sort.
Whenever I try running a game, I can hear a really bad whining sound which is extremely bad when I plug it into the amp. Here's a youtube video of it:
Guitar amps are designed to take signals from guitars which have different output signals than your PC does. The gain on your PC is probably much higher (or lower, I can't remember which). I would get a set of powered speakers designed for computer use (or a stereo amplifier/receiver with passive speakers).
i only used the guitar amp to make it so that my phone can pick up the sound i plugged the amp into my friend's desktop (literally like 3 feet away from my own computer) and did not get any static what so ever