Does the preamp output on the underside of the chassis provide a signal with, or without the 5 band EQ (compared to the fx send which which is before the 5 band)? How does it compare to the slave out?
the preamp out is just before the EQ. but you can check it quite easy if you move the sliders and listen to the preamp out signal. The Slave output is taken from the speaker out, so you get the exact sound as the speakers get.