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Public Address
IP
Digital control broadcast
wireless broadcasting
Cable FM broadcast
Public broadcasting campus
The traditional address
ampfilier
Outdoor column speaker
indoor column speaker
Ceiling Speaker
Wall mounted speaker
Business speaker
spherical speaker
Horn speaker
Mural speaker
Lawn speaker
Volume switch
rack
Power Amplifier
Four channel amplifier
Two channel Amplifier
Meeting System
Camera tracking conference system
Discussion conference system
Wireless conference system
Wireless microphone
microphone
Conference speakers
Professional Sound
Mixer
Audio around
Other
Volume Controller Series
Model: VK-10F/30F/60F/120F
Volume Control: Control of the region wide play sound when the sound pressure, typically a resistor or transformer voltage divider formula to achieve; more for the hotel.