Bartolini HR-4.7AP/918 Preamp Harness - 3-Band EQ w/ 4 Control Knobs & 3-Way Mid Frequency Selection Toggle - Active/Passive Switchable - Prewired for a 2-Pickup Installation Prewired 3-Band Active EQ for Electric Bass Includes Volume, Blend, Bass/Treble and Midrange Pots Push-Pull on Volume for Active/Passive Use Toggle for 3 Midrange Frequencies (High/Med/Low) One Year Warranty; Made in USA