The double square logo near the power indicator means it's double insulated and thus does not need an earth connection.Received this in a marketing email from Yamaha today...
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R-N2000A Network Receiver - Yamaha USA
Yamaha R-N2000A network Hi-Fi receiver compatible with lossless and high-resolution music sources and streaming services.usa.yamaha.com
MSRP: $3999.95 US
I know it's a "network" receiver, but no balanced inputs at that price? Ouch.
No grounded power? Maybe an expert can explain why that's not an issue, but it seems odd to me.