Sound doesn't coming from mid speaker on both yamaha ns-777. They are connected to denon AVR-3700H. So doesn't matter what I'm playing, movie, song, regular TV sound doesn't come from middle speakers
Yamaha NS-777 Sound Test #2 - YouTube
NS-777 - Specs - Speakers - Audio & Visual - Products - Yamaha - United States
Yamaha NS-777 Speaker System download instruction manual pdf