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Topic: Speaker with resistor to create proper load? (Read 342 times) previous topic - next topic


If I have an audio speaker signal that is rated for 1 Watt @ 32 Ohms, is it safe to wire a 1W/8 Ohm speaker with a 24 Ohm resistor on one of the speaker leads?

SIGNAL SOURCE ------|24 Ohm Resistor|-----SPEAKER +
SIGNAL SOURCE ------------------------------SPEAKER -


If your source can drive a 32 ohm load and you connect it to a 32 ohm load it will be OK.
The way you have it in your schematic isn't the same as how you have it wired up!


Mar 29, 2014, 08:59 am Last Edit: Mar 29, 2014, 09:00 am by pito Reason: 1
The best way how to connect the 8ohm speaker to 32ohm output is via an audio transformer with 2:1 winding ratio, thus you will not loose 2/3 of your power there..  :P


Or if it's a square wave output, build a little buffer amplifier using a transistor.  A 2N2222 would do a fine job.
Facts just don't care if you ignore them.

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