I've run into a problem with my amp unit and wanted to see if anyone here could perhaps help me solve it. I've owned a wa3 with dt990 combo for over a year now. It sounds great, but two issues have arisen with the unit since I've acquired it. I've toughed through them with my busy life, but enough is enough and I'm now ready to try to tackle the problem.
The first issue is that when the amp is plugged into the outlet using the power cable I bought from monoprice, and I run a like borderlands 2 for example, there is an audible buzz coming from the unit, as if someone is shaving. This buzz changes as things are changing on the screen. Outside the game you can "hear" your mouse moving across the screen. The support guys at woo are convinced that it is due to a dirty outlet line. However, I've moved since then and it is not different. The only thing that has fixed this is by using a 3 prong to 2 prong adapter at the end of the power cord. No noise is heard, or is so reduced that is not audible. I don't understand why this works, but removing the ground pin had something to do with the "dirty outlet line" theory? Enlighten me if you know otherwise. This solution doesn't make me feel any better as I don't consider it a real solution, rather a cover up. I've had to accept it as I had no time to figure out a better one.
The second issue remains unto today. After about 15 min of continuous use I begin to hear a different kind of noise that is independent of the content I am viewing. If sounds like a high pitch whine, such as from a TV unit or a power supply brick. It starts small and then picks up in intensity. It can easily be ignored due to how our brains get used to the background noise in general, but it also means there is no silence and when nothing is playing, I can't keep the headphones on. It's annoying. The oddest part is the solution, if I hit the unit (amp) with my finger or a pen, the buzz immediately stops. Then it starts up again after a while. Even more odd, is that if I elevate the front of the unit so that it is tilted 30 degrees (I prop it up with foam blocks) the noise severity is lessened and I don't need to tap the unit as much. However, it does not disappear.
Would someone with knowledge of the inner workings of the wa3 unit help me figure out why I'm having these problems. I truly love how it all sounds and have invested lots of money to make it happen. It terrible that I have to endure this annoyance. I would not wish it upon anyone else.
Sry for any typos, this was written on a phone. Thank you for your assistance.
Edited by nightfury - 11/30/13 at 1:46pm