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I don't know, but can I suggest (as it would attract thoose that may know) that you do not call your threads "Auto Radio" (you have 2 like this) and instead put the car radio model muber down.
I.E. "Auto Radio - Blaupunkt Malibu CR67 - amplifier?"
I mean no ofense, but just suggest it to get you a better reply.
P.S. Has the one that your after not got an amp in? has it blown? is it not marked on the IC's ?