Seymour Duncan S/D TB-4 JB Trembucker DriveSets the amount of gain

DriveSets the amount of gain in the overdriven signal

Traditional shape and chromed metal covers will make your harmonica comfortable and easy to play

Capable of being battery powered

Moisture-resistant ABS plastic combs for bright sound and tuning stability

and 12 black oxide cap screws give the awesome Seymour Duncan SH-8 Invader Pickup bolts of volts for an electrifying force of energy

Seymour Duncan S/D TB-4 JB Trembucker DriveSets the amount of gainTB4 Bridge Humbucker. A completely balanced coil configuration produces great harmonics and a high output with just the right blend of sustain and distortion. You get the best of both worlds from sweet warm tones to raw rock n roll.