Hello all,
I've been using the Fusion 12 for a while now and suddenly I am hearing a high pitched tone on inputs 9-12. I hear the tone regardless of whether or not the Fusion is connected to the MIx 12. I hear it on PFL with the fader up or down and also when the fader is up nomally. I also hear it with all inputs disconnected but only on 9-12. It sounds like a 240 cycle hum or higher but it's hard to say for sure. Anyone else heard of this problem?