I realize that max speed capabilities will only go as high as any 2x2 wifi device(meraki GR10) will push out, and in this case sounds like it's somewhere around 300Mbps.   Wish there was a 3x3 or 4x4 access point. ... View more

Yes it is possible. After setting up a network/SSID, select it from the networks tab. You then go to Settings>Advanced Settings>Radio Settings, you can configure the network to run in dual mode, 5GHz only or 2.4 GHz only.    ... View more