I just bought a couple of effects pedals and i have what im sure is a newbie quesion. Can i plug an EBS effects pedal directly into my Aguilar DB680 preamp? or do i have to do the bass to pedal to preamp deal? If i can plug it directly into to the preamp...where do i plug the pedal into? The effects send input or the effect return input??? I have no idea what these inputs are for.... Someone please give me a schooling if you dont mind! Thanks in advance.