Well to be a bit more technical , I would like to suggest some steps.
- First; don't use the data speed as diagnostic test. It's too indirect as indicator for improving the range of the wAP. It is OK as end-result test, but not precise enough as a diagnostic tool.
- What is the speed you mention? Start with the interface rate as test parameter. It can be found in the "Registration" Things like "144Mbps-20MHz/2S/SGI" should be there.
- MT does not tell the MCS encoding used, but it can be found in
http://mcsindex.com. With 20 Mhz channels, even with dual stream (2S), and short guard interval (SGI), 144Mbps is the max.
- CCQ quality is an important parameter. With lower CCQ the interface rate will step down the list. Low CCQ can be due to obstructions (walls) or interference (other AP or client), or too weak signal.
- a wAP goes further than 10 meter normally. But the client is usually the weakest transmitter! Be sure to concentrate on the correct cause for the lower rate.
- The Netherlands housing concentration usually leads to crowded wifi cells. Check what else is using your channel. MT is not able to pick the best channel for you!
- The physical placement of the wAP is also important.
- 2.4GHz should go further than 5 GHz but usually is overwhelmed by neighbors. For 5 GHz you use the "indoor only" frequency for Europe. You test 10 meter indoors, with a clear view on the AP? This really is a "groot huis" then.
- Try the 5500 (channel 100) and up frequencies, which can be used indoor and outdoor. They have 4 dBm more power, and go 60% further. Yes these are DFS channels !!!
[admin@MikroTik] > interface wireless info country-info netherlands
ranges: 2402-2482/b,g,gn20,gn40(20dBm)
2417-2457/g-turbo(20dBm)
5170-5250/a,an20,an40,ac20,ac40,ac80,ac160,ac80+80(23dBm)/passive,indoor
5170-5330/a,an20,an40,ac20,ac40,ac80,ac160,ac80+80(20dBm)/dfs,passive,indoor
5250-5330/a,an20,an40,ac20,ac40,ac80,ac160,ac80+80(20dBm)/dfs,passive,indoor
5490-5710/a,an20,an40,ac20,ac40,ac80,ac160,ac80+80(27dBm)/dfs,passive