It is becoming essential to have a "Fire Mute" function on background music systems in public spaces.
The reason is to mute any background music when an alarm is in progress allowing members of the public to clearly hear the alarm.
Many systems have been adapted with an external relay and power supply to provide this function. not an elegant solution.
Audio Design Services have a range of amplifiers with this feature as standard, activated by a closing volt-free contact from the control panel. Available Amplifiers:
ADS35DF 35Watts - Web Page
ADS60DF 60Watts - Web Page
ADS5120D 120Watts - Web Page
ADS5240D 240Watts - Web Page