I’m looking for someone who knows the BOSE system in the MiTo (Bj. 2011). My girlfriend absolutely disagrees with the performance (rightly). However, the unanimous opinion in all the contributions I have found seems to be that a BOSE system is not expandable and can only be replaced completely. The front system would have an impedance of 2 ohms and would overload any other radio. The subwoofer, in turn, would have to be supplied with reduced level, would take damage at a conventional speaker output. Business-grade shops offer for this purpose a “BOSE Active System Adapter” and claim that one can operate any radio with it. After I came through the research on no green branch, I just got rid of it yesterday and took out the original blue point radio. See there! 2 normal ISO plugs in standard placement, just no ignition plus. In addition an ISO and a Fakra antenna connection. (If there are only 4 loudspeaker channels, how should the Woofer get a low signal?) anyway, I didn’t have a short time to talk about it!