We have four sets of speakers. Two sets controlled by the cabin unit and two sets controlled by the rear radio. Has anyone ever rewired their speakers so all four sets can be used at the same time? Ideally I'd like a control unit so I can select which sets are on and off any any time, and can have all four controlled by the same source.
Wondering what coach you have, as ours has three sets, all controlled by a Jensen radio, cd/dvd player and mixer. Any of those three sets can be activated individually or with any of the others activated.