Hi @MAUROLOPEZ
Welcome to the Sonos Community!
There are a few too many typos for me to completely understand your post, but I think I get the gist.
If you are installing three Amps in the same location (in a cupboard, for instance), we recommend you disable WiFi on two of them. The third will transmit a private network for other (wireless and non-portable/non-Era) Sonos devices to connect to instead of to your WiFi network. If you do not plan to add any more devices in the future, however, you can disable WiFi on the third Amp too to reduce the possibility of SonosNet interfering with the WiFi.
Recommended settings for rack mounted products
Disable or enable Wi-Fi on your Sonos products
As for the Sonos app, it needs to be run on a device on the same subnet as your Sonos system (the first 3 numbers - not digits - of the IP addresses must match). Depending on the specific brand of your WiFi Access Points there may be additional steps to take to optimise the configuration for Sonos, so if you encounter any issues, please come back and let me know the brand of your Access Points.
Please note that any Sonos device connected to a TV via HDMI should not have WiFi disabled if surround sound is wanted, even when connected to ethernet.
I hope this helps.