My only options are either in same room as the original router or at the destination itself.

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Currently using a Motorola Surfboard Gigabit Router for Cable, which barely reaches a MacAir at the destination downstairs.

Costco has this one: 300N 5 Port Universal WB Edition, Amped Wireless High Power WiFi Range Extender Smart Repeater: 600mw output power and a recent MacRumors writeup mentions this one: BearExtender Turbo.

Normally one would put the extender somewhere halfway where the signal is still good and can then be extended, but putting it at the destination then trying to extend an already bad signal is just not going to work very well.

Have you considered using ethernet over power line adaptors to get the signal near where you need it then maybe extend with wifi.

I think with this limitation, you are not going to be happy at all with this solution.

Generally speaking youre sort of in airport class wifi broadcasting, and even then the floor is an issue.

What you probably need to do is to get a router with a directional antenna near a window, with the antenna mounted outside and pointing towards a receiving antenna out a window two floors down.

The 100 sideways might do doable without more, or run Ethernet to another AP.

I believe the Bear people also used to make directional antennas for their original USB based Bear; perhaps that with the extender on an extension cord in the place most likely to pick up the signal might work.

Or check the Alfa products, they make some similar products.

A range extender isnt much use if you cant place it in an intermediate location.

I have powerlines running all through my house some plugging directly into the computer, others into a wifi router.

Hi everyone. I am looking to extend my WIFI router reach 2 floors down and 100 feet sideways in a concrete floor and walls 5 story building.

Help With Wifi Repeater For Mac