1 set active 2 band eq preamp circuit for active bass pickup

type : other
item : active 2 band eq preamp circuit stipulations :
1 piece mec bec2-e preamp circuit
1 piece mec b500k push-pull volume potentiometer
1 piece mec a25k/c25k balance potentiometer
1 piece mec b100k treble potentiometer
1 piece mec b100k bass potentiometer
1 piece mec stereo long jack color : as shown in the picture
weight : 110g/set.syi