To know if the speaker is working, you use one 1,5 volts regular battery and connect those speaker's wires on battery. You put and hold with you hand one wire on any side off the battery and the other wire just toche on other side of the battery, if the speaker make noise like crok crok crok crok supost the speaker is good, if you did right test and don't make nois espeaker is not good, may be it open the coil. Don't mind for the polarit, no have problem with those wire position. I'm sorry for my English.
Aleixo, March 2007