Originally Posted by Ender_rpm
To my ear, the KSDs have always had a high/mid emphasis in their preamp, maybe what you are hearing now is the "natural" sound of the pickups?
Again , the preamp in the bass is the Aguilar OPB 3 and the pickups are Fender Samarium Cobalt Noiseless.
There is nothing stock about this KSD everything has been changed.
I just got it back from my repair man and everything is wired correctly. I also called Aguilar where I got some general pointers about trouble shooting. I suppose there could be an internal defect in the preamp itself, I don't know
But even if I can't find what the problem is I'm still OK because with the treble boosted all the way and the mids at 3/4 I get the sound I want. It's just that the preamp treble boost should be 18db but there is no way that what I'm getting is 18 db. So I know there is something wrong, but I can live with it.