I'm familiar of course with the preferable way to mix audio, that is prior to amplification. However, I have a few mobile radios with roughly 1 watt audio outputs, which I would like to send their audio to a single monitor speaker - and simplify things.
I suppose there are 2 ways:
Use larger variable pots for each of the inputs. Simple but the pots might be more expensive.
Attenuate the audio from the radios - could use a fixed resistor for this on each. Then amplify the combined audio.
I was thinking #1 - passive - would be easier and cheaper, but #2 may make more sense. Am I missing something?
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