There is no such thing as 4K sound. Any sound passed from the receiver or amp to the speakers is in the analogue domain. There will be no marked deterioration in using banana plugs.And it can cope with 4k sound and atmos and the watts a denon 4400 can do yes? Sorry new to speaker stuff and dont want to compromise my kit due to speaker wire.
Daft question also banana plugs make a difference to sound quality?