Strange , running Merlin 374'40 on my N66 and the connection

[jerry6]

is stronger than the AC 66 on ALL clients, 5.0 band , including the AC clients , My AC Edimax 7882 AC was connecting at 130 - 190 Mbps (40 feet away with 3 walls ) , now it is between 230 and 290 , all the N clients are stronger as well . All on the5.0 radio , don't use 2.4 much . Transfer rates are up a touch as well 1/2 to 1.5 MBPS .
Hope the AC 66 I get back from RMA is better than the one I sent in .