120 Watt Audio Power Amplifier Circuit Diagram

[Shane]

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Here is a simple and easy to build general purpose 120W Amplifier with TDA7293 IC for process sound system. This amplifier was have the input for a radio, TV, stereo or other line level device. It also has a phone input for a record player, guitar, microphone or other non-amplified source. With the addition of a low pass filter at the input, it makes a great amp for a small sub-woofer.

Parts
R : 660 Ohm 1/4 W Resistor = 2 pcs.
R : 22K 1/4 W Resistor = 5 pcs.
R : 10K 1/4 W Resistor = 1 pcs.
R : 30K 1/4 W Resistor = 1 pcs.
C : 2200uF 35V Electrolytic Capacitor = 2 pcs.
C : 0.22uF Capacitor = 2 pcs.
C : 22uF Capacitor = 4 pcs.
C : 0.45uF Capacitor = 2 pcs.
U1,2 : TDA7294 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY

T1 : 50V Center Tapped 5 Amp Transformer
S1 : SPST 3 Amp Switch
S2 : DPDT Switch
F1 : 2 Amp Fuse
SPKR1 : 8 Ohm 120W Speaker
MISC : Case, Knobs, Line Cord, Binding Posts Or Phono Plugs (For Input And Output), Heat sinks For Q1 And Q2