How do you check polarity of the speaker wires coming out of an amp? I'm not looking to check the polarity of the speaker, I know how to do that. I want to know the polarity of the wires coming out of the amp.
What I've been doing:
I turn my digital multimeter to DC
I attach a red cable to the red terminal on the amp
I attach the red terminal on my multimeter to the red cable
I attach a black cable to the black terminal on the amp
I attach the black terminal on my multimeter to the black cable.
When I do this I get a negative reading
If I reverse the terminals I get a positive reading
My conclusion was that the polarity of the amp is reversed.
Is this correct? Am I using the multimeter properly to determine polarity? If not, please provide step by step instructions for using a multimeter to determine polarity. Thanks you!