Qt X 600 6-Zone Sound Masking Control Module AVB 2U DJ Controllers There is also a USB

There is also a USB input that allows uses a fast and convenient way to update the firmware

Even with some background noise

Idea for background music

Dynamic Range: 85 dB

Controls: Wattage / low impedance selector switch

Qt X 600 6-Zone Sound Masking Control Module AVB 2U DJ Controllers There is also a USBThe Qt X 600 600D control module is a sound masking generator, controller, third octave band equalizer and amplifier, with two auxiliary audio inputs to allow for distribution of audio from paging controllers and or (background) music players. The Qt X 600 600D controls up to six zones of Qt standard or active emitters. The Qt X 600 600D control module is a compact six zone networkable controller suitable for installations of up to 72,000 square feet