Hi guys,
I am the lucky owner of a new set of a Model J black set (DP247+DP248). I am customizing a MIJ jazz bass, upgrading several components (I will post pics and info later on once I am sure everything is done well )
I have installed them following the official instructions, using the "parallel configuration" (https://d2emr0qhzqfj88.cloudfront.net/s3fs-public/diagrams/DiMarzio Area J Wiring Diagram_0.pdf)
However I have a couple of doubts:
1) for simplicity's sake, I connected the ground cable (coming from the copper tab under the bridge) directly to the first volume pot (third contact, together with the blackearth cable), instead of soldering it to the jack contact. Is this OK or is it a mistake? in theory all the earth contacts should be at the same potential and it should not make any difference whether a connection is made at a point A or B...
2) once the connection phase was completed, I tested everything. the sound comes out well without any problems. However, I am not convinced by the way the sound comes out from the parallel between the two pots: if I set them to "max" individually, everything goes smoothly. But if I turn them both on, the output level drops drastically (I'd say, by ear, more than half the volume of a single pickup). Moreover, the mixing is not balanced and uniform, the bridge pickup can be heard less than the neck one and it starts to be heard only when the pot is at 90%, first the sound remains practically unchanged and then it suddenly grows. Is this normal on a passive bass?
Do you have any tips and/or advice on this?
Thanks, cheers!