I've got a 1950 Series 61 and am replacing the radio/speaker. Does anybody have experience with speaker/amplifier placement in these cars? e.g., 1950-195? series 61/62/deville I'm going to replace the dash speaker with a dual coil retrosound 6x9 but beyond that, I could use some sage advice on placement of: 1) subwoofer 2) rear speaker(s) (just put another dual voice into the rear shelf?) 3) best place to install the amp? 4) use a crossover? I haven't selected a head unit and am possibly considering just running a jack from my phone into the amp, leaving the current radio unplugged serving only as a piece of interior trim.