JBL WIRING DETAILS FOR CAR
Jbl amp/ speakers | Lincoln vs Cadillac Forums the JBL system in my vehicle and want to hook up the jbl amp and sub amp. The JBL amp simply plugs into the wiring harnes but where do I connect the yellow and red wires from the sub amp? According to the diagram the yellow is power and always hot but what does "amp power return" mean on the red wire? The Return is your negative. Use a voltmeter and you will see this. For speakers, since the current is basically alternating, the "+" and "-" are for reference to hook all of the speakers up in the same "polarity" so that a drum beat pushes all of the speaker cones in the same direction - outward, for example. If you connect even one speaker in the opposite polarity, it will negate or cancel much of the sound energy from the remaining speakers and the db or sound pressure output of the system will be reduced. BL = Blue N = Natural BK = Black O = Orange BR = Brown PK = Pink DB = Dark Blue P = Purple DG ...