@Vix 

Hello，

Thank you very much for requesting information about our product.

 

For your information, the AV600 uses the 100Mbps ethernet port, which means the maximum speed you can get is not larger than 100Mbps. 

 

As you can see, the ethernet port is 100Mbps of the main adapter. 

Interface TL-WPA4220: 2× 10/100 Mbps Ethernet Port
TL-PA4010: 1× 10/100 Mbps Ethernet Port

 

AV600 is the highest powerline rate in theory. However the power line circuit is very complex, there may be much interference. Generally speaking, the conversion rate between the powerline rate and the actual speed is about 30%-40%; considering the interference, we use the 100Mbps ethernet ports, which should be adequate for the daily network activity. 

 

If the bandwidth is over 100Mbps, it is suggested to buy a powerline adapter with gigabit ethernet ports, Like TL-WPA8630kit, TL-WPA7510kit.

 

Wish your kindly understanding. 
 

While back to the case, we can do further analysis and try to speed it up.

 

1. Please only connect one end-device to the powerline unit by cable/WIFI and check whether the wireless or wired speed is slow? 

2. Please try the troubleshooting steps in this FAQ:  https://www.tp-link.com/en/support/faq/2231/

3. Please relocate the Powerline units in the same room or plug into the same power strip to do the test speed again.                                                                                                                                                                                                          

 (Note: during speed tests, do not run any high bandwidth activities like P2P download, gaming, or video streaming.)

If the issue persists, please let us know the troubleshooting steps you have tried in details and help confirm some information:

1. Please send us the Photos of speed test results from the main router and Powerline units.

                                                               

2. The photo of the Powerline rate on tpPLC Utility.

3. May I know the hardware on the label of the powerline unit and the firmware version on tpPLC Utility?

 

4. When did you buy the powerline devices and when did the issue begin?
 

Thanks in advance, and have a nice day!