[Wayne A. Pflughaupt]

Is it possible to use 1 filter for peq set to 80 hz and use the other filters for single shot or auto filter.

The FBQ is a bit different than the BFD most of us use, but it should be possible - if you connect the FBQ in front of the driverack. The manual can give you further instructions on how and if you can use parametric and feedback controls simultaneously.

Doesn’t the driverack have parametric equalizing? You could use that to take care of your feedback problem w/o inserting another processor in your main-channel signal chain.

Regards,
Wayne