Sorry if this was covered in another post... I could not find any info... I assume that the WiFi in the Roamio is N? I am guessing that they would not have been forward thinking enough to spend the few extra dollars and put ac in there?
Yes, it is N and given when these boxes were designed and when the internal parts were sourced, it is unrealistic to expect they would have included ac hardware when ac specs may not even have been available and are still not finalized.