Clear something up for all of us though, is the setting that you have called bass boost or subwoofer? Usually the subwoofer setting is okay to have up, but I have also never owned a Kenwood. Your ground looks fine but make sure that both of the coils read well individually. I blew the power supply of a SAZ-4500 because one of the coils on one of my woofers was open. Everything read fine at the amp though.
Also I'm not too sure on how you blow an amp clipping? Usually its the signal that is clipped affecting the subs, not blowing power supplies.