Power Leads as Variable Frequency Supply?

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Connecting a load to the power leads of a speaker and generating a square wave from a synthesizer can yield a similar output, but the quality of the signal will depend on the amplifier's frequency response. While the output may not be a perfect square wave, it should resemble the original signal if the amplifier is not overdriven. Additionally, a microphone input can be utilized as an oscilloscope to visualize the output. This setup allows for experimentation with using a speaker output as a variable frequency supply. Overall, the approach is feasible with some limitations regarding signal fidelity.
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hey guys, i was wondering, if i connect a load to the power leads going into my speaker, and i generate a square wave from a synthesizer, will i be receiving the same square wave signal into my load? in other words can i use a speaker output as a variable frequency supply?
 
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You mean if you connect the synthesizer to the input of an amplifier and connect a load resistor to the amplifier instead of the speaker?

Yes, sort of.

The output you get would depend on the frequency response of the amplifier, so a square wave may not be a perfect square wave any more, but provided you didn't overdrive the amplifier, you would get something out that sounded pretty much like the original and would look similar on an oscilloscope.
 
Absolutely - and you can use the microphone input as an oscilloscope, as well.
 

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