You can't use both together.Just recently upgraded my Front L/R/C setup from Klipsch inwall speakers to the SVS prime towers. I have the Yamaha RXA3070 and the Yamaha RXV867. I have been using the 867 to run my L/R/C's and im thinking maybe i shouldnt be with the new towers. Im pretty noobie with wattage and ohms and all that. My thinking is that the 3070 is more powerful and should run my high demand speakers and maybe and can have the 867 run my atmos and rear surrounds. I know at some point i should upgrade to an external amp ... maybe now.. but the 867 ive had for a long time and has been working well in my setup. please let me know the best way to proceed ...
The 3070 with no external amp is all you need.