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  1. Simple Audio Amplifier Using Single Transistor - Instructables

  2. Build a Great Sounding Audio Amplifier (with Bass ... - Circuit

  3. Top 10 Simple Audio Amplifier Circuit

  4. Simple Basic Audio amplifier with BC547 Transistor - Circuits DIY

  5. Amplify Your Sound: A Simplified Audio Amplifier Schematic

  6. Simple Basic Audio Amplifier : 5 Steps - Instructables

  7. 7 simple amplifier circuit diagram using transistor - ElecCircuit.com

  8. A list of Simple audio circuits and amplifiers for DIY(Do it Yourself)

  9. Make a Simple Audio Amplifier : 10 Steps - Instructables

  10. Simple Mini Audio Amplifier Circuits - Homemade Circuit Projects