Model:DIR-826L, HW:A1, FW:1.02/1.03/1.04 (I have the weak signal using the 5Ghz band.

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I use the iPad2/iPad mini/iPhone5/MacBookAir to connect my DIR-826L with the 5GHz signal, the distance between the DIR-826L no more than 4 meters! (iOS V6.1.3, Mac OS X V10.8.3)
Note : With the 2.4GHz signal, the distance between the DIR-826L over 12 meters!

PS. All kinds of combinations have checked, I can't leave the router over 4M otherwise the 5GHz SSID will disappear.
