A:AnswerYes. The speaker outputs accept banana plugs straight in the back, or accept bare wire with a screw at the 2 o'clock position. It's really easy to connect bare wire
A:AnswerPer the specs, if you're sending a 4K signal through it...it will display 4K. It does not upscale 1080p content to 4K. Do note that only one input has the ability to pass true 4K content along (via HDCP 2.2.
A:AnswerFrom Yamaha:
http://faq.yamaha.com/us/en/article/audio-visual/av-receivers-amps/rx/rx-v479_black_u/10915/8734
A (Aventage) is a higher grade than the RX series. Higher quality components, one year additional warranty.
A:AnswerYes. It absolutely has built-in wifi. Note the antenna connector on the rear of the receiver. Also, you can check the manual at yamaha. It lists the steps needed to connect the built-in wifi to your network.