yamaha rxv677 On Wikipedia
in this wikipedia, you can browse the complete list of yamaha Product including yamaha rxv677
https://en.m.wikipedia.org/wiki/List_of_Yamaha_Corporation_products

yamaha rxv677 Official Site
you can read many details and information about yamaha rxv677 in their manufacturer site. details like, complete features, technical spesification and etc
http://yamaha.com