Neither EMGs nor an OBP3 would be found in a bass shipped from Alembic. The best places to get a definitive answer would be from EMG or Aguilar. EMG has some informative support docs on their site.
In general, though, I would expect the answer to be no, and that the wiring will need to be done carefully. Active EMGs contain a preamp inside the pickup that requires power to operate.
