Powerline Speed Sharp Dropoff Over Short Distance

<td>I’ve recently moved to a 3 story townhouse where wifi router on the 3rd floor can’t reach the other 2 floors.<br>I bought a pair of powerline adapters (with Wifi cloning function) to fix the problem.<br>Although it works, the speed I’m getting from the client adapter is very slow compared to what the adapter stats described.<p>Here’s the adapters I bought:<br><a href=”https://web.archive.org/web/20161224165601/http://www.tp-link.com/ca/products/details/?model=TL-WPA4220KIT” target=”_blank” rel=”nofollow”>http://www.tp-link.com/ca/products/…</a></p><p>In theory I should be getting 500 mbps, in practice, I’m getting 14 mbps.<br>My method of testing:<br>-I have a broadband 50 internet connection that gives me 50 mbps speed off the modem/router. Connecting directly to the router confirms that I’m getting around 48 mbps from speedtest.net.<br>-Then I connected the router to the host powerline adapter, and the client adapter to my PC. Both powerline adapters were plugged into the same twin power outlet. Again tested with speedtest.net, speed remained 48 mbps.<br>-Next I simply moved the client adapter to a power outlet not 5 meters away, performed the same speedtest and the result went down to 18 mbps.<br>-When I moved the client adapter to a power outlet on the 2nd floor, speed gone down to 14 mbps.<br>-Weirdly, when I moved further away down to the 1st floor, the speed remained unchanged at 14 mbps.</p><p>Neither adapters were plugged into any power strips or surge protectors, I’ve ensured that no fans or heavy electronics were plugged in near them.<br>I’m frankly quite stumped and frustrated.<br>Does anyone have expertise with powerline technology to render assistance?</p><p>Thanks.<br></p></td>