Heinrich's VCT Volume Controller Series is designed for use in Public Address (PA) systems with a 24V relay. This controller is used to adjust the output of loudspeakers in a room. It ensures that the same output level is maintained across all speakers on the same line, as the signal loss at the end of the speaker line is significant. By adding a volume controller at the front of the line, the speaker output can be lowered to maintain a consistent ambient output level.

The volume controller is equipped with a 24V relay that can override the output level to maximum during emergency situations such as fire alarms. This feature ensures that the evacuation message can be heard even in conference rooms where the volume may have been lowered or turned off during meetings.

The VCT Volume Controller is made of high-quality, UV-protected ABS material that blends seamlessly with white walls and architectural designs. It also comes with a built-in transformer to control the PA 100V line loudspeakers. The controller has four levels of volume attenuator and an off position.

It is important to note that the surface wall mount or in-wall mounting box must be purchased separately.