2-Way Active Crossover with Linear Phase Response

2-Way Active Crossover with Linear Phase Response

2way_active_cross_linear_phase.gif (12035 bytes)

�� 2 �� 3 �� , �� . �� . �� . �� , �� . �� . �� TR1-2-3 �� . �� Fig.2 �� Fig.4 �� . �� Low Out �� [Woofer], �� High Out �� [Tweeter] �� Fc=3KHZ.

This circuit of is 2-way active crossover that follows the philosophy of 3-way crossover with linear phase response, for applications however that follows the 2-way active crossover philosophy. Theoretical analysis you can see in the same circuit. Thus better being you select the standard capacitor values first and then calculating the resistor values. Proportionally the cut-off frequency that you will perhaps select, it will be supposed you place certain resistors at parallel or in line so that you achieve value as much as possible more near in the theoretical calculation value. This is easier and precise. In the place the trimmer TR1-2-3 you can place potesometer. In the pictures Fig.2 until Fig.4, exist functional information as well as the calculation types of components. From the exit Low Out we take the signal that drives a power amplifier and the low speaker [Woofer], from the exit High Out respectively is drive the power amplifier of high speaker [Tweeter]. The component values that I give in the components list they are in effect for cut-off frequency Fc=3KHZ.

Part List

R1=100Kohms	C1=4.7uF 100V MKT	TR2-3=47Kohms trim. or pot.
R2-3-4-5-6=37.5ohms [33K+4.7K]	C2-3-4-5-6-7-12-13=1nF 100V MKT	IC1-2-3=NE5532 - TL072
R7=75Kohms[150K//150K]	C8-9-10-11-14-15=100nF 100V MKT	J1-2-3=2pin conn. 2.54mm pin step
R8=N.C	C16=2.2uF 100V MKT	J4=3pin conn. 2.54mm pin step
R9-10-11-12-13-14-15-16=10Kohms	C17=470nF 100V MKT
R17-18=47Kohms	C18-19=47uF 25V
R19-20=47ohms	TR1=100Kohms trim. or pot.	All the Resistors is 1-2% 1/4W metal film

2way_active_cross_linear_phase_2.gif (5202 bytes)

2way_active_cross_linear_phase_3.gif (13897 bytes)

Sam Electronic Circuits 11/02

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