Active Surround Sound Circuit

Listening to the sound of music or watching action films will definitely feel more sensational if the add this Active Surround Sound Circuit because this is a circuit that is suitable to be paired with various audio devices. This circuit can convert the sound source from stereo media into 4 output channels (Left, Right, Rear Left, Rear Left), So you can listen to sounds from 4 different sound corners. You can also upgrade this circuit to 4.1 channel by adding a subwoofer filter paralleled with this circuit so you can add speaker subwoofer and amplifier to add more booming bass sound. Below the Active Surround Sound circuit diagram include regulated power supply 12V.

12V Regulated Power Supply Circuit Diagram

Component List:

R1,7                                = 47K

R2,8,13,14,18,19,23,24  = 100K

R3,6,10,11                      = 3K6

R4,9                                = 4K3

R5,17                              = 3K

R15,16,20,21                  = 27K

R17,22                            = 20K

C1,8                                = 47nF

C2,7                                = 8,2nF

C3,6                                = 39nF

C4,5                                = 220nF

C9,10                              = 1000uF/25V

C11, 12                           = 100uF/25V

C13,14,15,16                  = 100nF

U1,2                               = RC4136 / TL075

U3                                  = 7812

U4                                  = 7912

D1,2,3,4                         = 1N4001

J1,J2                              = Audio Input L/R

J3                                   = Rear Right

J4                                   = Right

J5                                   = Rear Left

J6                                   = Left Output

J7 Pin 1,2,3                    = 15VAC, CT, 15VAC

J8 Pin 1,2,3                    = +12VDC, GND, -12VDC

PCB Layout Design Active Surround Sound Circuit

PCB Size =  6,7 cm x 13,4 cm

See also 5.1 Home Theater using Gainclone Amplifier.