Description:A useful tool: this preamp circuit is designed with 5 individual potentiometers and allows you to adjust the tone and volume. Wide Application: With this guitar pickup control system, you can easily control the guitar's volume, bass, mid and top end. Suitable Instrument: The cables in the preamp harness are suitable for electric guitar, electric bass guitar and other piezoelectric instruments, and are easy to install. Easy to Use: This guitar preamp circuit is designed with 5 knobs, just turn the knobs to quickly adjust the tone and volume. A good replacement: These cables in the electric guitar preamp harness have incredible performance and are useful and suitable for an old or damaged one. Specification:Capacity: Master. Bass: +/- 12dB at 85Hz.Treble: +/- 12dB at 7KHz.Note:There may be a little color distortion due to different computer resolutions. There may be a slight error due to different manual measurements. Package Included: 1 Piece Preamp Circuit.