Hello - follow up question - i had bought a cheap external CB speaker. I cut the wire out of the external speaker jack from the CB to hook up to the line level. One wire is black and one is black with a white stripe. Which is positive and which is negative? Thanks!
I need to combine the external speaker output from my cb (Cobra 75 WX ST 3.5mm mono jack, "The external speaker should have 4-8 ohms impedance and be able to handle at least 4 watts.") with either the 3.5mm output from my phone (into the aux input on head unit) or the rca output from my sony...