As many high end graphics card have high frequency coil whine and my particular one is causing whine on my diy studio monitors, what would be the best way to filter this noise?
My studio monitors are powered by 24v 750mAh DC adaptors (each) which I suspect aren't properly filtered. Audio signal is carried from Sound card by stereo cable. When using headphones, there's no noise. When I use a different audio source to the monitors, there's no noise. When I exit any GPU intensive application (gaming/rendering) the noise disappears. So that rules out any troubleshooting. High frequency noise is jumping from the graphics card over to my diy monitors.
My proposed solution:
4,7uF ; 0.1uF ; 0.001uF Bypass filtering capacitors rated at 60V connected in parallel on my 24vDC voltage input.
1:1 600 Ohm Audio Isolation transformer on my input.
Please criticize and give a better solution if you have one.