Re: Wiring 'Aux-in' (iPod) connectors to Car radios
An exra length of twin flex could be soldered to the connecting points inside the radio, but this isn't strictly neccesary. Two speakers can simply be connected in parallel via suitable lengths of flex, then connected to the exsisting speaker lead fitted to the radio. If this lead still has the original 2-pole socket(many get cut off), and you have a lead terminated in the matching plug, simply join this to the wires going to each speaker. As to speaker phasing, given that the original plugs & sockets are reversible, and most speaker flex has a strip on one of the two conductors, simply ensure that the two leads are connected together 'like for like' i.e. striped lead to striped lead. No harm will come to either the radio ior the speakers if they are wired out of phase, but a reduction in bass response will almost certainly be noticed.
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