Hi Taylormade2 -
Sorry to hear about the problem with your DNA-0.5. I have no idea what work was done on your amp, but it seems possible that the factory updated the Earth / main-board ground path while doing the repair work. This would normally be a good thing, but it may have gone awry in your particular setup.
If the amp were "broken," I would expect to hear noise constantly, even with no input cables connected. You say that the noise disappears if you remove the interconnect cables, and this suggests a ground loop. Try "floating" the earth ground connection on the amp by using an AC "cheater" plug (3-to-2 connection adaptor). These are available at your local hardware store. In addition, if you have any kind of an audio connection to a cable TV video system, disconnect it. If the hum disappears, you have been dealing with a ground loop. For a more complete explanation, go here: http://www.altavistaaudio.com/hum.html
Good luck!
Best regards,
Steve McCormack
www.SMcAudio.com
Sorry to hear about the problem with your DNA-0.5. I have no idea what work was done on your amp, but it seems possible that the factory updated the Earth / main-board ground path while doing the repair work. This would normally be a good thing, but it may have gone awry in your particular setup.
If the amp were "broken," I would expect to hear noise constantly, even with no input cables connected. You say that the noise disappears if you remove the interconnect cables, and this suggests a ground loop. Try "floating" the earth ground connection on the amp by using an AC "cheater" plug (3-to-2 connection adaptor). These are available at your local hardware store. In addition, if you have any kind of an audio connection to a cable TV video system, disconnect it. If the hum disappears, you have been dealing with a ground loop. For a more complete explanation, go here: http://www.altavistaaudio.com/hum.html
Good luck!
Best regards,
Steve McCormack
www.SMcAudio.com