Bartolini HR5.4AP/918 Preamp Harness - Volume Blend Mid Treble Bass NTMB-918F 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