hi how are you i run a stereo installation business and have the same problems with sony stackers as a sony rep i have contacted them and the error code manuals are very hard to come by my distributor has told me that stackers are no longer being made as the ipod and usb conections are now avaliable he recomends upgrading to one of these units sorry mate i have had to replace 18 stackers in the past month as none of the other companys are using them any more ither

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