I often get problems when i play too near a FOH stack with my single coil pickups picking up the FOH signal and getting some nasty high freq squealing as the signal chain of guitar-->kpa-->desk-->FOH loops. Similarly i sometimes experience this when standing too near my monitor, which is just for my kpa, as there is no longer a need for a guitar amp/cab.
Previously i had a 4x12 behind me and it was never an issue. Used to be nice to get extra sustain when stood near the cab as there was some "good"guitar-->cab interaction.
i wonder if the "old" setup of a standard amp+cab acts as enough of a filter that it reduces the bad feedback but allows the "good" feedback.
I figure that there must be some hi freq signal creeping through the signal chain, or more specifically, less of a LP filter with a kpa and full-range monitor.
any strategies for achieveing the right amount of good/bad feedback with a FUll-range monitor
other than use humbuckers? (Or the obvious move further away or turn down-theres a noisy drummer close by im trying overcome)
Incidentally since i replaced them with lace sensor noiseless pickups it has helped but still an issue.
theatre venues that employ a induction loop for hearing-aids are enemies of pickups too.
thanks