Not being able to see the complete picture, I can only suggest that the correct midrange driver polarity is the one that sounds best to your ears.
If I were choosing the colour coding, black wire would be my choice for connecting to the negative terminal - but that's just me!
If I were choosing the colour coding, black wire would be my choice for connecting to the negative terminal - but that's just me!
Correct polarity is such that there is no dip in crossover frequency due to cancellation.
To measure is to know.
http://www.troelsgravesen.dk/Inverted-Polarity.htm
To measure is to know.
http://www.troelsgravesen.dk/Inverted-Polarity.htm
Check the other ends of the wires, maybe those are reversed also.
Also, use a 1 5v battery to double check the markings. plus to plus moves the cone towards the listener.
Btw, it would be very common to have the mid inverted relative to the woofer and tweeter
Btw, it would be very common to have the mid inverted relative to the woofer and tweeter
The Mid-Range is connected with reverse polarity on purpose. This avoids phase cancellation that would result in a big dip in the frequency response at crossover. I have the schematic for the D3 & D5 crossovers, but not the D6, which is quite rare.
If you can draw a schematic of the crossover we may be able to guess which polarity would be correct. You just have to trace parts connected from the input terminals going to the drivers.
FWIW, here is the D3/D5 Crossover schematic. Note the straight wired woofer and reverse polarity on the midrange. Cerwin Vega speakers can thump pretty hard, but they were not known for their crossovers. Information on the D6 is scarce. Can you post pictures of the speaker, front and back, plus the crossover?