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INITIAL TESTS:
❒ 1. Connect up 8 to 15 volts of DC power. For simplicity use a red wire for positive (+) and a black
wire for negative (-). Wait! check polarity before switching on the supply.
❒ 2. Connect any speaker ranging from an impedance of 3 ohms to 45 ohms. Speakers in the 4 to 8
ohm region are best suited for this kit and will yield the greatest power. Make sure the speaker
wires are in the correct holes!
❒ 3. If you are wiring up a jack for earphone or external plug-in speaker, the tip of the plug goes to
the positive (+) speaker connection and the “sleeve” goes to the common ground (-) connection.
❒ 4. Apply an audio input such as a microphone. Any audio input should use shielded cable to pre-
vent noise pickup such as AC line hum or other electronic equipment (including itself!). This will
also prevent the possibility of self-oscillation which will sound like a terrible scream.