Ok, I have a 98 Mustang with the Mach 460 audio system. After installing my KD-R610 reciever ( http://www.crutchfield.com/p_105KDR610/JVC-KD-R610.html?search=r610&ssi=0&tp=568 4&tab=features_and_specs ), I bought a pair of TS-G6843R speakers ( http://www.crutchfield.com/p_130TSG6843/Pioneer-TS-G6843R.html?tp=92&tab=feature s_and_specs ). I just did some reading, and found out that the Mach system is rated at 6 ohms. Will these speakers be sensitive enough to avoid creating problems with the JVC reciever and stock amps? Thanks.