Demo of JBL SRX815p inducing noise into mic cable via power cable Part 1

For a while I had been having an intermittent high frequency noise issue with my PA system where noise would appear mainly on the vocal mic channels on different shows. Turns out the culprit is the AC cables from my JBL SRX815p and SRX812p speaker that I often use as floor monitors. The amp modules appear to be dumping noise into the AC line and into parallel positioned mic cables. This demo is with a single open mic. The issue can be quite bad with multiple open mics & monitors.