@Petes 

We do not have a AX extender out yet, but you can use a AC range extender to get additional distance like the RE450 or RE650 to extender the 2.4Ghz and one of the 5GHz networks.

@Tony 

Hello Tony,

I have been using AX11000 since 4 months and I get very good speed in my house which is 1400sqft. However, if I stand just outside the home almost 30ft away from the router, with the glass door closed the speed drops to 100mbps. Further more if I go to 40ft, I get less than 10mbps speed. I have tried connecting to 2.4GHz separately by disabling Smart connect. I see the same result.

Previous to TP-Link Archer AX11000, I was using Netgear AX5700 which was giving me 70mbps speed at 100ft from the router. I had problems with Netgear so had to return it.

FYI: I checked the speed inside the home with AX wifi card on laptop, manually configured 5Ghz channel to 160Hz and AX only option, I get solid 2.4Gbps speed.

Even with High transmission power why there is drop in the signal. on an average I see 400mbps speed on devices using AC even though I'm in the same room as the router?

@NaikP 

Lowering the transmission speed may help with coverage. It seems odd, but that can help at some times so test other levels just to see.

I would test most combinations of width and channels.

Other settings to try would be to change the wireless modes to non AX so 2.4GHz to b/g/n and 5GHz to a/n/ac.