I just got a Marantz 6015 to upgrade from Onkyo NR709, i observed that i have to go -11db to even get a good room filling sound. i have a 7.4 set up and its really strange and not sure how i can get this thing not to crank up that much to hear a good volume to fill the room.. Room size is about 19X 15 so its not big .. when i go around 10 to 20 db i cannot hear anything.. I read the above blog where it talks about inefficient speakers etc but i had the same speakers with my Onkyo NR709 but never had any issue.. I did try the Source Level and it does help but wondering if there is anything else that can suggested to be looked at??