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Q: Are knobs included with the preamps?
Answer:
Aguilar: No
Bartolini: included are knobs for the concentric (stacked) pots - if there is a stacked pot in the particular harness you are purchasing. These are black, hard plastic knobs.
John East: Yes
Q: Do Preamps come prewired?
Answer:
Aguilar: No...but we do offer wiring services (they are found below the configuration lists on the Aguilar preamp pages.
Bartolini: Yes
John East: Yes
Q: What voltage can XX preamp be run on?
Answer:
Aguilar OBP1 preamp uses 18 Volts. Aguilar OBP2 and OBP3 can use 9 or 18 Volts.
Bartolini NTBT (2 Band) and NTMB (3 Band) can use 9 or 18 Volts.
John East (J Retro and U Retro) preamps can use 9 or 18 Volts.
Q: What voltage are the preamps prewired at?
Answer:
Aguilar preamps are not prewired...for our prewiring service, you can specify which voltage you would like.
All Bartolini preamps are prewired for 9 Volt. Bartolini includes additional battery clips to change to 18 Volts.
All John East preamps are prewired for 9 Volt.
Q: What style of output jack is included with the preamps?
Answer:
Mostof the preamps come with the short threaded style jack that is typically found on basses with the electronics mounted on the front plate or pickguard. These same jacks are also found on basses with electrosocket jacks as well as football plate style. Most often, you can use the jack that is already in the bass if it is a stereo jack. We do sell the long threaded barrel style jacks on our knobs page.
The John East U Retro Preamps (all of the East non-plate mounted preamps) have longer thread jacks pre-wired, enough for use in front-mounted wood-faced installations.
Q: Do Bartolini preamps need to be installed in the layout configuration that is the layout diagram?
Answer:
No, the potentiometers and switches can be moved around. They are connected by wires and not mounted to a PC board. Depending on the layout, a simple jumper wire need to be added to extend reach.
Q: Do I need active pickups to work with a preamp
Answer:
No. Most aftermarket (not originally installed in the bass) preamps are designed with passive pickups in mind.
Q: Will a Bartolini XXX preamp fit in my P or J bass without modification
Answer:
Depends. If your bass has a rear mounted control cavity, then it most likely will. If it is a P or J style with a the small front plate (a la Fender®), than probably not. The cavity will need to be modified slightly to the preamp.
Q: What are the sizes of the Bartolini Preamp modules
Answer:
For the three band:
One of the modules is roughly 5/8" X 1 3/16" X 1 3/4".
Second module is 5/8" X 1" X 1 1/4".
For the two band:
There is just one module and it is roughly 5/8" X 1 3/16" X 1 3/4".
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