You can maximize the throughput speed on the 04AC and 05AC models as follows:

First log into the settings menu via (default username root and password ecowifi!).

  • Adjust the channel bandwidth to 80 MHz in the Basic -> Network settings menu.
  • Configure the router as a switch, as explained in the manual on page 8, to mitigate NAT bandwidth limiting.

Speeds up to 400 Mbps should then be achievable on the 5GHz AC network.