Guangzhou FTD Audio Electronics Limited
PA system Voice alarm system professional manufacturer
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Public Address Audio System Volume Control With Relay Public Address
Product Description
* The volume controller is used to keep same output level for one same speaker line, because the end the speaker line signal loss
is rather big, so its outputs is less, thus volume controller is added to the front of the line to lower the speaker output so
as to keep the similar ambient output level for the all of the speaker in the same line.
* The volume controller with 24V relay working principle: the relay from the amplifier or PA system will be input to this volume
controller to override the output level to maximum when there is fire alarm or other emergency situation, by this way, some
conference room even lower the volume or off the level during meeting even could hear the evacuation message during emergency.
Product usage introduction