Yes, 6 1/2 rear speakers are what the Mach Systems have in the convertibles. I am not certain as to the non-Mach. I would get a better amp than that Boss. I was running Infinity Kappa 6x* Components in the front and 6 1/2 in the rear, Pioneer AVHP4200 headunit, Diamond Audio D310 subs, Diamond Audio D600.4 and D1000.1 Amps. I am getting rid of my Infinity Kappa Components and going Diamond Audio D6 Components. This is essentially how both my set ups will be in the Convertible and Cobra.