Guyker 2-Band Preamp/Tone Control with Adjustable Gain for JB Bass (with Jazz Bass Control Plate, Dome Control Knobs and Stacked Knob) : Amazon.ca: Musical Instruments, Stage & Studio
Amazon.com: MXR M81 Bass Preamp Pedal Bundle with XLR Direct Out, 3 band EQ and Level Controls w/ 4 Cables : Musical Instruments
Amazon.com: Guyker 2-Band Preamp/Tone Control with Adjustable Gain for JB Bass (with Jazz Bass Control Plate, Dome Control Knobs and Stacked Knob) : Musical Instruments