The original Bartolini design gives you the timeless tone that started it all full and warm for that vintage voice you've been craving, enhancing the natural voice of your bass. These split coil pickups are hum-cancelling, so they are well suited for studio or stage. They have a blade core design, so you dont have to worry about string alignment. Original Barts bring out your voice, low and clear. In the early 70s, Bill Bartolini leveraged his deep knowledge of acoustics to create pickups that produce the most natural, musical voice from the instrument. He added shielding to block radio signals and noise. He developed a method of sealing, isolating, and stabilizing the coils so they could be encapsulated in epoxy to eliminate microphonics the nasty noise you get when you touch typical pickups.