In our house is not a single network cable, but a solid power cabling. The TP-Link I kan. To a peak data throughput of about 4 MB / s In HD streaming through network which will ever closely, especially if the Duch sentence is not shared with other devices. With the "Devolo dLAN 650+ Starter Kit" I'm on the same path to 10-12 MB / s, which clearly entschäft the situation. To be fair to say that the TP-Link adapter costs only one-third, so that the price performance ratio, but if 500 Mbit draufsteht should be more than about 30 MBit be possible - and the Devolo adapters prove it.
Powerline LAN is always dependent on the existing home power wiring. It may be that the TP-Link adapter into another house to create more, with me they have just not done. as the saying goes: "Try making Kluch")
