Stuffed in.

[quote="rockbobmel":1qb4r1g0]Funny though, all the controls are backwards, meaning counter-clockwise is gain..[/quote:1qb4r1g0] Sounds like the input and ground leads on the pots may be reversed.

That's exactly what it was. I just thought of something. If I install a 3 lead Neutrik jack and the housing is plastic, How do I connect the grounds to close the circuit?

[quote="rockbobmel":31tc1t1e]If I install a 3 lead Neutrik jack and the housing is plastic, How do I connect the grounds to close the circuit?[/quote:31tc1t1e] I think Sheldon uses the Neutrik jack with a metal housing. I'm not sure that answers your grounding question, though.

The stock Neutrik Jack is both stereo and metal so no need to change. The ground buss is located on the rotary switch - all ground wires go to the rotary and a single ground lead goes to the jack.

Thanks Sheldon. Man, does this thing RIP! I can also get the stock passive sound exactly when all controls are in their center detent position. Do you have the matching STACKED KNOBS? I LOVE this bass!

My stacked knob has the old style on the bottom and new knob on the top. You may have to do something similar.

A friend of mine is selling an OBP-3 with complete circuit pretty cheap, so I'm seriously considering the upgrade. Aside from an extra hole for the mid pot and replacing the Blue EQube with mid-freq switch, is there anything major to consider? I guess I'd lose the 4-way selector to a pickup pan, so won't have series/parallel options anymore. I tend to only use bridge pickup and both pickups in series (is that loudest?), so probably won't miss it. Cheers, EG

Double post, oops.

[quote="evilgus":3b5j8b9s]A friend of mine is selling an OBP-3 with complete circuit pretty cheap, so I'm seriously considering the upgrade. Aside from an extra hole for the mid pot and replacing the Blue EQube with mid-freq switch, is there anything major to consider? I guess I'd lose the 4-way selector to a pickup pan, so won't have series/parallel options anymore. I tend to only use bridge pickup and both pickups in series (is that loudest?), so probably won't miss it. Cheers, EG[/quote:3b5j8b9s]No, It's straight forward. I am glad I kept the 4 way switch. With it now being active, The series/parallel gives you a different gain and tone response to play with. Especially with tube amps. When mine was passive, I only used it on the louder setting. The pan idea sounds good too! Maybe you can do that with the volume knob hole and lose the master volume.