Replacing Polk drivers in RTA 12C and early M 10

geppy1
geppy1 Posts: 3,075
edited December 2013 in Vintage Speakers
Looking for thoughts on two things. I know this has been touched on before but I want to be more specific My original early Monior 10s have 6500s w peerless . Would replacing them with 6503s be an upgrade? The 6503 was used in the late 10B (1986-89) aand the xover looks to be the same except for the Poly switch

Late RTA 12Cs that came with 6501s. Can one use 6503s?? Is that an upgrade? I one point before Polk started remaking drivers I that that was recommended. Specs look close. Would be nice to know the specs on the 6600 but nobody seems to have them
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