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This is a handy, easy to build general purpose 50 watt amp. The amp has an input for a radio, TV, stereo or other line level device. It also has a phono input for a record player, guitar, microphone or other un-amplified source. With the addition of a low pass filter at the input, it makes a great amp for a small subwoofer.

R11200 Ohm 1/4 W Resistor R21200K 1/4 W Resistor R3130K 1/4 W Resistor R511K 1/4 W Resistor R615K 1/4 W Resistor R7,R1021 Meg (5%) 1/2 W Resistor R8,R920.4 Ohm 5 W Resistor R11110K Pot R12,R13251K 1/4 W Resistor R14147K 1/4 W Resistor C11100uF 35V Electrolytic Capacitor C210.011uF Capacitor C313750pF Capacitor C4,C621000pF Capacitor C5,C7,C830.001uF Capacitor C9150pF Capacitor C1010.3uF Capacitor C11,C12210,000uF 50V Electrolytic Capacitor U1,U22741 Op Amp U31ICL8063 Audio Amp Transister Driver thingy Q112N3055 NPN Power Transistor Q212N3791 PNP Power Transistor BR11250 V 6 Amp Bridge Rectifier T1150V Center Tapped 5 Amp Transformer S11SPST 3 Amp Switch S21DPDT Switch F112 Amp Fuse SPKR118 Ohm 50W Speaker MISC1Case, Knobs, Line Cord, Binding Posts Or Phono Plugs (For Input And Output), Heatsinks For Q1 And Q2