Hello, can I connect function generator and the speaker directly? Is it safe to do so?
Probably safe until you apply power to the device.
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Have your movie recorcer running when you power up, you could get some very interesting pictures.
Many function generators have a 50 Ohm output impedance, the speaker possibly has 8. See something wrong here. Also the function generator probably was not designed to drive an inductive load, see a problem.
The best solution is to place an amplifier between the speaker and function generator with the speaker connected to the OUTPUT.
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