My new FX Audio DAC-X6 is producing background noise (high pitched, steady whine), which seems to be unusual judging by the many reviews that praise its silence. Any help in diagnosing the problem would be much appreciated.
What I know:
It's not my PC. The noise occurs when there is no input source connected.
It's not a ground loop. My plug is only two prong (no ground pin) and the problem occurs when I plug into any outlet in the house.
It's not the power cable because the static occurs even when I swap to a different one.
The static only occurs when the DAC/AMP is powered on, and does not start until after a ~3 second delay from when the power switch is flipped on.
The input source selection switch has no effect on the noise.
The noise gets slightly louder when I increase the volume knob.
The noise is noticeable in my ATH-M50s and a pair of crappy ear buds. However, it is not detectable when I plug in some Samsung ear buds or a pair of 1MORE ear buds.
So, what do you think? Are my MH50s picking up something they shouldn't, or is the amp a lemon and I should return it? Thanks again.
What I know:
It's not my PC. The noise occurs when there is no input source connected.
It's not a ground loop. My plug is only two prong (no ground pin) and the problem occurs when I plug into any outlet in the house.
It's not the power cable because the static occurs even when I swap to a different one.
The static only occurs when the DAC/AMP is powered on, and does not start until after a ~3 second delay from when the power switch is flipped on.
The input source selection switch has no effect on the noise.
The noise gets slightly louder when I increase the volume knob.
The noise is noticeable in my ATH-M50s and a pair of crappy ear buds. However, it is not detectable when I plug in some Samsung ear buds or a pair of 1MORE ear buds.
So, what do you think? Are my MH50s picking up something they shouldn't, or is the amp a lemon and I should return it? Thanks again.