Yes, you are almost right
It works when connected like this: to the most left power+ and speaker wire1; to the most right power-; second from right speaker wire2. Thanks.
I wanted to connect it to the
Intercom phone ("door phone") and make it ring, but its not that easy, the sound is noisy and quite. I need something else...
Intercom phone schematics:
Maybe someone knows what input is needed for L+ and L-? If someone knows any circuits that would generate ringing sound and work with Line L+ and L- pins that would be great.