Yamaha TRBX504 4-String Premium Electric Bass (Translucent White)The Yamaha TRBX504 4 String Premium Electric Bass features controls for master volume, balance, 3 band EQ, and an active passive switch for maximum flexibility. Pickups YGD designed H5 pickups are defined by a clean, open tone perfectly matched with the flexibility of the active passive preamp design. Its quad polepiece design and Alnico magnets give them the power to drive the active circuit, and the sensitivity and subtlety to capture every nuance