Put it in the effects loop of your amp. The loop of the AG500SC is switchable between line level and instrument level. Try both to see which works better with the Nightbass.
Machines hate me, and i don't know what i'm doing: do i run a cable from the input on the art to the aggie's loop? do i need to be sending and returning? really, this is pretty foreign territory for me....
I also recommend reading the manuals for both items and get familiar with the features and controls. If you don't have the manuals handy, they can be found online pretty easily.
