EMG Passive PJ with 4 Knobs

[BeRad]

I am putting some EMG Geezer's in a PJ bass that currently has an active set up. My question is: my bass has 4 holes so I want to do VVTT.

Is there anything special I need to do or can I just buy an additional pot and wire

P/u -> volume -> tone
And have a wire connected to the ground wire and output jack?

Thank You

 

[dwizum]

Just need an additional pot, cap, and some wire. EMG sell their parts individually if you want it all solderless plug and play.

Keep in mind that the tone pots won't be isolated, i.e. both tone pots will impact whichever pickup(s) are "on" at any point in time.

 

[BeRad]

Just need an additional pot, cap, and some wire. EMG sell their parts individually if you want it all solderless plug and play.

Keep in mind that the tone pots won't be isolated, i.e. both tone pots will impact whichever pickup(s) are "on" at any point in time.

How would I go about isolating the tone pots so that each pickup has it's own volume and tone?

 

[dwizum]

There's really no good way to do that, on a fully passive bass at least.

You can put in a pickup select switch, and wire the tones before the switch, like a les paul (or other two pickup Gibson guitar). Then, when you have one pickup selected via the switch, that pickup's tone works and the other pickup's tone is cut out of the circuit. When both pickups are selected, both tones will be in play.

You can put the tone controls on the pickup side of the volume pots, and you'll get the same effective result - turn one volume all the way down and that pickup's tone control is taken out of the circuit.

There's also the common 62 Jazz Bass option, which involves putting resistors in series with the controls to isolate the tone controls. That gets you isolation all the time, but the resistors also cut output.