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Installation and Operation Guide
Qt X Sound Masking System
Outputs - Sound masking devices
Emitters - Qt X 300/600 models
The Qt X control modules support installation of both Qt Standard and Active
emitters. Both emitter types are 'direct field' devices, mounted downward for
direct unimpeded transfer of the audio signal to the listening location (Figure 11).
Qt Passive emitter
The passive emitter is a passive audio loudspeaker device suitable for sound
masking applications. This emitter receives an amplified signal directly from the
Qt X control module via a UTP category cabling infrastructure. Maximum sound
pressure levels with this type of emitter are 60dBA at 1 meter with a sound
masking frequency response of 200Hz to 6.3kHz.
Qt Active Emitter
The active emitter is a self-powered audio loudspeaker device suitable for
sound masking and paging/background music. This emitter contains an internal
amplifier which receives the audio signal directly from the Qt X in addition to a
direct current voltage which powers the active emitter. Both power supply(s)
and power injectors are required for operation in addition to the Qt X. Maximum
sound pressure levels with this type of emitter are 65dBA @ 1 meter with a
sound masking frequency response of 125Hz to 8kHz. Maximum sound pressure
levels for paging and background music are 74dBA @ 1 meter with a frequency
response of 105Hz to 16kHz.
Qt Passive emitter
Qt Active Emitter
Figure 11.
Emitters for use with Qt X 300/600 controllers
