Small mid pitch tone from new radio with amp connected

Had to replace my Alpine I207-WRA with the new i407 model.

I have an Alpine KTA-30FW and it all worked well.

With the new radio, I am getting a very faint mid pitch tone. Not a buzz or hum. Like a electronic tone.

Nothing changed and did not have the problem before.

With or without music I hear it. Very, very faint