I have a NUMARK M6 USB 4 channel mixer with LEFT and RIGHT Balanced XLR output connected to channel 1 and channel 2 of my AUDAC EPA252 power amplifier respectively. My speaker is a passive HYBRID PB15L @400W(800W peak) connected via Speakon to my EPA252 in bridged mode. My problem is that no sound is coming out of the speaker, and the amplifier goes into standby mode after about 30seconds(according to the amplifier site,this is due to no signal received). I've read multiple articles and blogs, and watched multiple videos but still cant find any help regarding this issue. Any idea what I'm doing wrong??