07-16-2009, 08:18 PM
I have a HRDx and when I put it on standby after the amp is nice and warm it makes a loud popping sound. If I go straight from on to off without putting it on standby it doesn't make any noise. When I am warming the amp up and go from standby to on there is no popping noise either. Just from on to standby before I shut off. Any ideas what could be causing this?