JR, then that VP100 wasn't getting "too quiet" again, as we discussed last year. What you propose may be feasible. First, as to impedance when the VP100 and VP150 would be run in parallel: the reciprocal of the total net impedance when speakers are run in parallel is equal to the sum of the reciprocals of the separate impedances. Here (1/8)+ (1/6)= 1/T; 7/24=1/T; T=3.4ohms. This low impedance doesn't necessarily mean that the receiver will shut down; low impedance problems are often exaggerated. Also note that the speakers operating in parallel would create an increase in sound level of 3dB, or for the same total level would need only half the power, which would also reduce the current required, making a problem less likely.
As to the wiring, there're two ways: conceptually the simplest is to connect separate speaker cables to the receiver's center output terminals(trimming the ends if necessary to make both fit the terminal)and then connecting to the two speakers as usual; the second way is to connect one wire to the receiver and run it to one center speaker, then run a second wire from that speaker's terminals to the second center, connecting the positive terminal to the positive terminal and negative to negative.
