i figured out the issue when i switch my front speakers to large it turns off my sub im not exactly sure why it does that. My old yamaha receiver didnt do that and it has the same on screen interface. (rx-v671)
I hooked up my amp for the first time today i am running a cerwin vega xls15s sub. I am also runnin an external amp with two cerwin vega xls15's. it was all playing fine until I did my firmware update to version 1.70 now my sub will not work at all for music the only time i can get it to work is...