Hi  @RobertMEF 

Thank you for sharing your extensive experimentation and observations.

Firstly, it's important to note that while it may seem that spatial streams are not working as expected in multi-user configurations, there could be several factors at play. For one, even if clients are compatible with DL-MU-MIMO, there could be other environmental factors or settings that are impacting the performance. Just because there is no visible interference nearby doesn't necessarily mean there aren't other issues affecting the signal.

Regarding the performance degradation when multiple clients are active, this is not uncommon as the network resources are shared among the connected devices. However, it doesn't necessarily mean that the spatial streams are not working as intended. As for the comparison between 4x4 and 2x2 APs, in an ideal scenario, a 4x4 AP should offer better performance and higher total bandwidth. But in real-world scenarios, as you've experienced, it may not always be the case due to various factors such as client capabilities, network congestion, and interference. It's also possible that there could be some configuration or optimization that you haven't tried yet that might improve the performance.

Have you checked for firmware updates for your devices? Sometimes, new firmware can address performance issues and improve the functionality of the network.

In conclusion, while it's understandable that you're frustrated with the results of your experiments, it's important to consider all possible factors and continue to explore different solutions to optimize your network performance. If you haven't already, you might also want to reach out to our technical support team directly for more in-depth troubleshooting and advice. 😊