Just plugged my Emotiva in.
The amp was quieter than normal before ( so I'll have to test it again when the amp is humming loud again), after I plugged it in the amp hum got louder! Speaker white noise increased a little too. It's weird because I have my isotek evo3 sigmas plugged into the emotiva.
The problem is that I'm testing the emotiva dc blocker when the amp is hard to hear, it's like bringing the car into the mechanic to look at something that isn't quite broken.