I bought this locally and it was advertised as having an Aguilar Preamp and the original preamp included. Well I opened it up and it looks passive to me, though looks like it was shielded with black paint. He also handed me the 'original preamp' (I thought these were passive) and it is just a green circuitboard that says 'mk1' and has 18 wires coming off of it, all different colors. What the heck is it? Doesnt really matter that it wasnt as described...plays and looks great and is in like new condition with only some buckle rash and an added thumbrest.