I was all ready to have my aftermarket amp & subs installed tomorrow, but now the shop is unsure of the safety of doing such a thing. They just heard of a case where adding an amp (via line-out converter) resulted in the system producing no audio. Everything worked, except there was no sound. Now they are having me hold off until they learn more. Has anyone had experience adding an amp to a Sync audio system via line-out converter (or otherwise)? Shouldn't this be an easy install? I have a 2010 Ford Fusion Sport with the 12-speaker Sony (Moon & Tune) package. Thanks for your help, Steve
