ok, i have a lakland 55-02 bass with bartolini MM pickup with bart. jazz. i am trying to wire a Aguilar obp3 pre-amp, and man i am havinig probs with the Blend control... what i mean is all the way to left i have neck pickup all the way right i have bridge BUT inbetween i have nothing? man,i have double/triple checked the wiring dia. and my connections.. but still same prob.i am pulling my hair out,lol. i am using 500K volume with 500K blend controls,any suggestions will be greatly appreciated!,thanx.