based on 900mA not 9mA
403mA Full mode
278mA LC mode
148mA SCB
you will lose a lot of sound going from full to scb, however it will depend on the acoustics of where they are as to how loud its sounds to someone.
Place the louder option to the side of the property that is likely to draw the most attention.
You may get feedback, especially having two other units driven, remember the speaker- in the panel can only have one speaker of 16ohms or 2 of 8 ohms each wired to it.
I don't use the internal sounders you are referring to so I have to refer to the manuals, and don't know exactly how they will behave in your setup.
403mA Full mode
278mA LC mode
148mA SCB
you will lose a lot of sound going from full to scb, however it will depend on the acoustics of where they are as to how loud its sounds to someone.
Place the louder option to the side of the property that is likely to draw the most attention.
You may get feedback, especially having two other units driven, remember the speaker- in the panel can only have one speaker of 16ohms or 2 of 8 ohms each wired to it.
I don't use the internal sounders you are referring to so I have to refer to the manuals, and don't know exactly how they will behave in your setup.