OBP-3 passive tone control?

[madjazzbass]

I'm sorta leaning towards the Aguilar OBP-3 preamp (2 pickup, 4 knob, 1 switch);
Control Configuration

1. Volume
2. Volume
3. Mid Push/Pull (Freq. Selection)
4. Treble/Bass Stack
5. Active/Passive Switch. - Thing is, I'd like to have the option of a passive tone control when I'm in passive mode. I know there's guys that have this setup; Can you tell me if there's a control knob for passive mode, Or if the passive mode is just always "wide open"? I'd like to be able to roll the Treble/Bass off/on as needed when in passive mode. Thanks

 

[Will_White]

I'm sorta leaning towards the Aguilar OBP-3 preamp (2 pickup, 4 knob, 1 switch);
Control Configuration

1. Volume
2. Volume
3. Mid Push/Pull (Freq. Selection)
4. Treble/Bass Stack
5. Active/Passive Switch. - Thing is, I'd like to have the option of a passive tone control when I'm in passive mode. I know there's guys that have this setup; Can you tell me if there's a control knob for passive mode, Or if the passive mode is just always "wide open"? I'd like to be able to roll the Treble/Bass off/on as needed when in passive mode. Thanks

There is no boost in a passive system so it will be cut only but you can add a stacked passive treble and bass control in front of the preamp.
https://www.google.com/url?sa=t&sou...WFJFHlm8icEXS9x0w&sig2=wySzbwW3FV8kdCbjl4RStw
It will add a another knob tho

 

[mikezimmerman]

See http://www.bestbassgear.com/wiring-diagrams/v-bl-t--msw-b-ap-tone.pdf

Or better yet, this one: http://www.bestbassgear.com/wiring-diagrams/OBP3wTone.pdf , since it's pretty much exactly the setup you asked for, except the mid frequency switch is shown as a separate 3-way switch instead of a push/pull.

 

[JustForSport]

You can do this with a stacked vol/vol, stacked bass/treble, stacked mid control, and a push/pull tone pot that bypasses the preamp and routes the signal from the vol's to the jack while connected to the tone pot.