Thank you for bringing my attention to this part of the documentation. I had missed it at the bottom of the page. (EU Compliance Information - Cisco Meraki Documentation). We were previously missing the spatial stream calculation.    Roughly: 4 spatial streams = +6dBi; 8 spatial streams = +9dBi.    This explains why our MR56s will not go higher than 12dBm Tx on the lowest 5Ghz channels after August's update.  ... View more