brettmtb Posted December 1, 2020 Share Posted December 1, 2020 I have a new MD20 Stage scape and it works awesome except that our drummer uses 2 overhead condenser pencil mics with AA batteries instead of Phantom power. there is a low frequency hum/rumble in the speakers which disappears when we unplug these mics. It doesn't increase in volume as we wind up the overall volume but its audible enough to be annoying when we are setting up. it does it regardless of channels we use and on both mics so I'm sure both can't be faulty? Quote Link to comment Share on other sites More sharing options...
stormstudios Posted December 1, 2020 Share Posted December 1, 2020 How long is your cable run from the mixer to the mics? Are they shielded cables? I'm sure the more techy tech people will be along shortly but that's definitely your first troubleshooting point. Quote Link to comment Share on other sites More sharing options...
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