This is a Simple Active crossover Circuit Diagram with TL074. An audio source, like a mixer, preamp, EQ, or a recorder, is fed to
the input of the Electronic Crossover Circuit. This signal is either AC
or coupling, depending on the setting of switch 51, the non-inverting
input of buffer amplifier Ul-a, a section of a quad BIFET, low amp TL074
noise made by Texas Instruments op. This stage has a gain of 2, and its
output is distributed to both a low pass filter made by R4, R5, C2, C3,
and Uld op-amp, and a high-pass filter made by R6, R7, C4, C5, and op
amp ULC.
These are12 dB / octave Butterworth filters. The response of
the Butterworth filter was chosen because it gives the best compromise
between the damping and phase. The values of capacitors and resistors varies depending on the
selected connection that your device works. The filter outputs are fed
to a balancing network made by R8, R9, RIO, R14 and potentiometer RLL
balance. When the potentiometer is at its center position, there is a
unity gain bandwidths for both high and low filters. Power for the
electronic circuit is regulated by Crossover R12, RI3, Dl and D2, and
decoupled by C6 and C7.
Active crossover Circuit Diagram with TL074
