Impact Twin serious audio crackles. Help!

Impact Twin serious audio crackles. Help!

Good morning,

I have an Impact twin from +5 years and never had a single problem with it.
Today I’m experiencing serious and long audio crackles and noises coming out from my speakers (ADAM A7X).

After several trials and checks, I realized that the problem verifies only on the 2 main output channels (Line Outputs 1 – 2).
Moreover, it verifies also with my Macbook turned off and the firewire cable unplugged.

I’ve tried to unplug the power supply and plug it to a different socket, change the power chord, but the audio crackles continue to be there.

Please help me. I need my setup to work.

Thank you.

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Source: http://forum.tcelectronic.com