The 9CBJD are hum cancelling Dual Coil Pickups - Deep Tone-Strong Lows and Mids.
CB series bass pickups feature an extended and more resonant frequency
range. They have far more "air" and definition at the top without
sacrificing lows and low mids. They are cast in epoxy to remove unwanted
feedback and microphonics.
The bass in the video below uses the 9CBJD deep tone pickups.