Hi everyone, first post and hope you can help me. I own a pair of 4312's which I've had from new since 1984. Only today I downloaded a speaker polarity test app on my phone and out of curosity tested my speakers. I was surprised to find that the midrange drivers tested negative whilst the tweeter and woofer tested positive. This was the same for both left and right.
According to this manual the white wire is the +ve connection to the midrange driver https://manuals.harman.com/JBL/HOM/Technical%20Sheet/4312%20ts.pdf
The image is my arrangement. The connectors are male and female so obviously can only go one way but I can't see which is +ve or -ve. Is there a way of determining which speaker terminal is +ve and -ve? I can't see any colours or markings.
Thanks
Don