DescriptionThis item is a 3 band EQ preamp circuit bass guitar wiring harness and JB pickup set. There are middle, treble, volume and bass. System-III five individual potentiometers. With bass/midrange/treble, master volume. Suitable for Electric guitar, bass and piezo equipped instruments.Feature- Color: As shown. - Material: Copper and iron. - Size: About 10 x 7 x 3 cm (L x W x H) - Input Impedance: 20Mw - Frequency Response: 20Hz-20KHz - Bass: 12dB at 85Hz - Middle: 12dB at 800Hz - Treble: 12dB at 7KHz - Output jack - Power: 9V battery (not included) - Suitable for Les Paul/Epiphone Electric Guitar. - Active preamp 3 band equalizer EQ. - Harness guitar bass tone control. - System-III five individual potentiometers. - Four of them: Middle, Treble, Volume and Bass. - Bass guitar tone controls for active pickups. - Bass/midrange/treble, master volume. - Suitable for electric guitar, bass and piezo equipped instruments.