I am not overly technical but will try to explain the problem I am having to see if anyone has any idea.
We are a guitar duo, we use a Gigrac 1000 with Peavey cabs and laney monitors, we use Vox tonelabs straight into the gigrac, so no amps.
For some reason two gigs back when we set up and started our sound check as soon as we turned up the monitors we had massive feedback so we had to use the headphone socket to run the monitors to get us through the gig, but of course we had no monitor control...just main volume.
We checked it out at a rehearsal and it was fine, but at our last gig it did the same again... we tried moving the monitors forwards, backwards... moved the mic's but still loads of feedback past no 3 on monitors....
If this makes any sense to anyone... any ideas?? could if me the monitor out plug??
Thanks in advance