WD4JKH
Member
Sorry, but you have it backwards. The lower impedance will cause more current to be pulled and as such more noise. I mean sound, on the output.
The siren speaker has the higher impedance. It will draw less current from audio/noise than the 8 ohm speaker at the same volume level.
The point will be moot anyway since he will probably lose it as soon as he pulls out of the driveway..