Simple circuitry, Passive high-quality amplification and distribution. This circuit is suitable to amplify and distribute the audio signals. The input audio signal is applied to the J1 and after passing through the P1, It is buffered and amplified by the IC1 prepared to redistribute. It has 3 outputs to drive 3 audio lines with 300 ohms impedance.
Diagram:
Parts:
J1 RCA Socket (See Notes)
R2 1K
C1-C3 100uF-25V
P1 100K-Potentiometre
R3 2.2K
D1-D2 BZX79C18
R* 10K-100K
R4,R5 2.7K
Q1,Q2 BC337,BC327
R1 560K
R6-R8 330R
IC1 NE5532-34
Notes:
J1 will be RCA Audio input female socket.
R* is on your choice it can be choose between 10K to 100K resistor.
Output capacitor’s value is between 100uf to 470uf and power handling is 25V to 50V.
You can power up this circuit via +12V/-12V regulated supply but you have to remove following parts Q1-Q2-C2-C3-D1-D2.
Maximum power ratings +35V/-35V