I am in the process of restoring some Marantz Imperial 8 (http://www.classic-audio.com/marantz/imp8.html) speakers for my dad. He wants a vintage setup. The reciever is a Marantz model 4140 (http://www.classic-audio.com/marantz/4140.html) The configuration is a 3 way crossover, with lows going to a single 12", mids going to three 3"s and highs going to 2 1"s. All of the drivers (except for the tweeters of course) have experienced bad foam rot. Where can I find suitable replacement drivers and what ohm will they need to be to result in an 8 ohm overall impedence? Thanks!
They will remain an 8 ohm load as long as they are all 8 ohm drivers and the crossover does not overlap any frequencies. Impedence changes where frequency overlaps. Best bet is to measure the resistance of the speakers when you take them out and replace with a speaker of the same resistance.
Well the tweeters for example are wired in parrallel, wouldnt that have an effenct on the resistance? I am not sure how the three midranges are wired because they are in a seperate enclosure.
