Comfort 2 5.054 Diallout

[slychiu]

The battery/Supplementary power supply is really a requirement for an intruder alarm system as the system would be very vulnerable without one. A power cut would disable the system.
The main power supply is able to provide 1 Amp + to power all the devices. hence when you have a few speakers or sirens this exceeds the maximum load and requires the battery to help supply some of the current

[rodime]

Understood.  But as stated above, the battery is connected and healthy

[slychiu]

Sorry missed what you said about battery connected
The speaker output is specified as 8 ohms. If you connect two 8 ohms speakers the load becomes onyl 4 ohms. Yu can try connecting the speakers in series instead of parallel which means that the load is 16 ohms for 2 8 ohms speakers