3 High Accuracy RIA/ IEC MC and MM Phono PreAmplifiers:  (circuit / schematic design added 6/06)

3 Transistor Audio Amp (50 Milliwatt ):  Here is a little audio amplifier similar to what you might find in a small transistor radio. (added 4/02)

30 Watt Power Amplifier:  Ultra-Low distortion30-Wattpower amp (added 4/02)

300W Subwoofer Power Amplifier:  Please note that  specification for this amp has been upgradded, and it is now recommended for continuous high power into 4 Ohms, but You will need to go to extremes with  heatsink (fan cooling is highly recommended). It was originally intended for "light" intermittent duty, suitable for an equalised subwoofer system (for example using  ELF principle see  Project Page for  info on this circuit). Where continuous high power is required, anor 4 output transistors are recommended, wired in  same way as Q9, Q10, Q11 and Q12, and using 0.33 ohm emitter resistors. ... (added 2/07)

360 Watt Amplifier:  (circuit added 9/06)

380 Watt Amplifier:  (schematic / circuit added 9/06)

4 Watt Amplifier:  (diagram added 6/03)

50 Watt Amplifier:  Easy to build general purpose 50 watt amp... (added 7/02)

50w Amplifier:  (electronic circuit added 4/05)

50w Audio Power Amplifier:  (electronic circuit added 4/05)

55 Watt (Originally 75w) Power Amplifier:  (schematic / circuit design added 9/02)

60 Watt into 8 Ohms Power Amplifier:  A simple amp to build, uses commonly available parts and is stable and reliable (added 4/02)

60 Watt Power Amplifier :  (circuit added 9/04)

60w Bass Amplifier:  Low-cut and Bass controls.  Output power: 40W on 8 Ohm and 60W on 4 Ohm loads (added 3/05)

60w Guitar Amplifier:  Bass, Treble, Harmonic modifier and Brightness controls.  Output power: 40W on 8 Ohm and 60W on 4 Ohm loads (added 3/05)

68-Watt Power Amplifier:  Experimential power amplifier using  low-cost LM3886 monolithic power amp IC. Suitable for sound reinforcement in small to mid-sized clubs. Includes parts and circuit for 28Vdc bipolar power supply.  (circuit design added 10/06)

75 Watt Power Amplifier:  AKSA is a highly refined push pull solid state stereo amplifier of 75-Wattper channel (added 4/02)

8 Watt Amplifier #2:  (circuit added 10/06)

8 Watt Amplifier:  (diagram added 6/03)

80 Watt Amplifier #1:  Uses  LM12 chip (app note added 4/02)