Hi
I have 2 sure electronics AB32514 amps and one of them has developed a nasty hiss at idle. Both amps were completely silent for a long time but one has now degraded. The noise is pretty loud, it is removed if I set the SW1 to off without the volume control board connected but gets worse once the volume control board is inserted. I also get a whistle when using the smps power supply but not on battery power. The other amp is silent on smps. If anyone has any suggestions I'd love to hear from you.
I have 2 sure electronics AB32514 amps and one of them has developed a nasty hiss at idle. Both amps were completely silent for a long time but one has now degraded. The noise is pretty loud, it is removed if I set the SW1 to off without the volume control board connected but gets worse once the volume control board is inserted. I also get a whistle when using the smps power supply but not on battery power. The other amp is silent on smps. If anyone has any suggestions I'd love to hear from you.