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TP-Link Archer C9 AC1900 Dual Band Wireless Router (w/AV500 Powerline WiFi Kit) Review

To test the TP-Link Archer C9 and AV500 WiFI Range Extender Kit, we used Totusoft’s LAN Speed Test software to measure the real-world network throughput when transferring a 100MB file between a wired ‘server’ laptop and a wireless ‘client’ laptop. LAN Speed Test provides real-world performance results as it creates the file, measures the time taken to transfer it, and calculates the effective network throughput.

To eliminate potential bottlenecks, the ‘server’ computer was connected via Gigabit Ethernet to the TP-Link Archer C9. As we wanted to test wireless performance, the ‘client’ laptop was connected via the maximum supported speed on the 2.4GHz and 5GHz frequency bands.

It is important to point out that the walls in my home are very thick which does have a negative impact on a wireless signal.

We tested the performance of the router and range extender in three different positions:

  • Short Range: Router positioned with the ‘client’ laptop three feet away, to show the best performance scenario.
  • Mid Range: Range extender and laptop located 20 feet from the main Router on the floor below, with the signal passing through one solid wall.
  • Long Range: Range extender located in the same place as the mid-range test, with the ‘client’ laptop located 15 feet further away through another solid wall.

In all three of the scenarios we recorded the performance connecting both to the router directly and through the range extender. We also tested these on both 2.4 GHz and 5 GHz bands.


As we can see from the graphs above, we experienced far superior performance at short range on the 5 GHz band in both the read and write tests.  At medium range, read performance remained superior on the 5 GHz band but write performance was similar to 2.4GHz.  At long range, we weren’t able to connect to the router on the 5 GHz band and received a very weak signal on the 2.4 GHz band – although this wasn’t enough to complete our tests.  We did however experience strong performance from the range extender at long range.

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