Try unplugging the EP500 for about 10 seconds then plug it back in...For some reason my EP600 thumps now and then after it builds up a charge or whatever, once I unplug/plug it back in it goes away..


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85