This is basically a new pre amp. I installed it briefly in my Fender Jazz. I prefer the passive sound so I took it out. It works perfectly. This one has the optional black knobs. ($24.00+) Specs Volume Pickup blend Mid/Passive Tone Stacked Treble and Bass Frequency response 20Hz~20KHz Control range 20Hz~15KHz Treble control 15KHz(10dB) Middle control 1KHz(12dB) Bass control 300Hz(10dB) Input Impedance 1Mohm Output Impedance 10Kohm Current requirement 9V 0.72mA 18V 0.77mA I did have to modify the cavity to get this to fit. YMMV $70.00 shipped CONUS **Decided to keep it.