Circuit diagram category » Speaker

Surround Sound Decoder

The following diagram is an small surround sound decoder schematics. You may use this decoder surround sound systems for your home audio system.

Surround Sound Decoder circuit diagram

Parts List:

R1-2-7-8-12-13-18-19-20=47Kohm
R3-4-5-6-21-22-34-35=10Kohm
R9-10-11-14-15-16-17=15Kohm
R=23-24-25-33-36=100ohm
R26-27-28-31-32=100Kohm
R29-30=5.6Kohm
C1-8=47uF 25V
C2-7-9-14-23=47nF 100V
C3-6=1uF 100V
C4-5-10=33pF 100V		 C11-12-15=10uF 25V
C13=82nF
C16=18pF 100V
C17=100pF mini adjustable capacitor
C18=2.2nF
C19=4.7uF 25V
C20=100nF 100V
C21=10nF
C22=180pF
C24=150nF		 RV1-RV2=2X10Kohm  Log. pot.
RV3-4=10K Log pot.
D1=1N4148
IC1-6=TL072
IC2-3=TL074
IC4=MN3101
IC5=MN3004
JI…..J6=RCA female  jack
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Passive Surround

This is the diagram of passive surround circuit. Passive surround doesn’t required any active components to make the circuit works. The circuit just need the combination of resistors and electrolytic capacitors.

Passive Surround circuit diagram

Notes:

  • Use full range type of speaker. Do not use woofer or tweeter speakers for rear speakers.
  • 5W resistors is a must, 1/4 or 1/2 watt resistor will make it burned.
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Loudspeaker System Crossover Network

Building a crossover for your speaker system is easy. Here the schematic diagram:

electronic circuit diagram

Notes:

  • Capacitor must be non-polar capacitor types with a voltage rating of 50 volt or more (preferably 100 volt).
  • Capacitor may be paralled to achieve specified values.
  • Inductors should be air core. Do not mount inductors in top of each other.
  • Resistors should be 100 Watts or more.
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