What a noise level.
Just replaced my "SUNON EF40101B1-1Q08C-S99" noise generator (the main problem of the noise) with an "NF-A4x10 FLX".
Now my DHI-NVR5208-8P-4KS2E sounds silently, all the noise gone with the wind....
In my recorder you can insert the "NF-A4x10 FLX" directly on the main board...