This is the schematic diagram of 2-way active crossover circuit. The "active" word means that the circuit use active component and need power supply to work. Take a note that the input of this circuit is not connected to the output of power amplifier. This crossover circuit module must be placed before the amplifier circuit. The "Low Out" output connected to a power amplifier and the low speaker [Woofer], while the "High Out" output is drive the power amplifier of high speaker [Tweeter].
R1 = 100Kohms
R2,3,4,5,6 = 37.5ohms [33K+4.7K]
R7 = 75Kohms[150K//150K
R8 = N.C
R9,10,11,12,13,14,15,16 = 10Kohms
R17,18 = 47Kohms
R19,20 = 47ohms
C1 = 4.7uF/100V MKT
C2,3,4,5,6,7,12,13 = 1nF 100V MKT
C8,9,10,11,14,15 = 100nF 100V MKT
C16 = 2.2uF/100V MKT
C17 = 470nF 100V MKT
C18,19 = 47uF/25V
J1,2,3 = 2pin conn. 2.54mm pin step
J4 = 3pin conn. 2.54mm pin step
IC1,2,3 = NE5532 , TL072
TR1 = 100Kohms trim. or pot.
TR2,3 = 47Kohms trim. or pot.
All the Resistors is 1,2% 1/4W metal film
Circuit Source: 2-Way Active Crossover Circuit with Linear Phase Response