I don't know much about ARP pickups, but the wiring diagrams I have see look a lot like the one Simon provided.

If you are committed to using this pickup I'd consider doing a little testing first.

It may work with or without the external preamp like EMGs...but it may not. It doesn't look like these were ever sold except in an Ibanez bass with a 2nd pup and a preamp under the tone controls.

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