While working with a crossover and thinking about polarity, I had the thought that unless there is some kind of standardization in place, the + and - marked terminals on a driver only have meaning for that particular driver model, or possibly manufacturer. If I mix and match brands of woofers, mids, tweeters, who's to say that applying a positive voltage to the + terminal will make all the cones move in the same direction, since it depends on the direction the voice coil is wound. Is this a valid thought or am I missing something?
+ "normally" moves a cone outward, however in some aftermarket speakers I've seen the reverse happen.
A 1.5 volt battery is helpful to determine actual polarity.
A 1.5 volt battery is helpful to determine actual polarity.
Most vintage JBL are opposite standard polarity. It doesn't hurt to check either using a 1.5v on woofers and looking at the impulse response against a know driver.
Rob 🙂
http://www.cieri.net/Documenti/JBL/Technical Notes/JBL Technical Note - Vol.1, No.12C.pdf
Rob 🙂
http://www.cieri.net/Documenti/JBL/Technical Notes/JBL Technical Note - Vol.1, No.12C.pdf