CX462 Audio System Controller
Setup And Installation Guide
CLOUD ELECTRONICS LIMITED
9 Remote Music Mute - Fire Alarm interface
In certain installations, such as licensed premises or retail outlets within a shopping mall, there may be
a local authority or fire service requirement to mute the music signals via a fire alarm control panel in
an alarm condition. The CX462 provides a facility to mute the music signals only, by using a fully
isolated pair of contacts. This is usually a relay mounted close to the CX462, which is powered by the
fire alarm control panel. The relay can either be closed or opened in an alarm condition, but the
internal jumper J13 MUST be set to the corresponding position:
w
N/C:
Alarm condition when the relay opens.
w
N/O:
Alarm condition when the relay closes.
When setting the jumper(s) please ensure that you:
• Remove the mains cable from the rear of the product before removing the top panel.
• Only reassemble the unit using screws identical to the original parts.
10 Technical Specifications
Line Inputs
Microphone Inputs
12
V3 280904
Frequency Response
20Hz-20kHz
+0, -0.5dB
Distortion
<0.03%
80kHz Bandwidth
Sensitivity
100mV (-17.8dBu) to 1.5V (+5.7dBu)
Input Gain Control
24dB range
Input Impedance
48k
Ω
Headroom
>20dB
Noise
-91dB rms
22kHz Bandwidth (0dB gain)
Equalisation
HF: ±10dB/10kHz, LF: ±10dB/50Hz
Frequency Response
-3dB@ 30Hz (without filter)
20kHz -0.5dB, +0dB
-3dB@ 150Hz (with filter)
Distortion
<0.05%
20kHz Bandwidth
Gain Range
0dB-60dB
Input Impedance
>2k
Ω
(balanced)
Common mode rejection
>70dB 1kHz Typical
Headroom
>20dB
Noise
-128dB rms EIN
22kHz Bandwidth
Equalisation
HF: ±10dB/5kHz LF: ±10dB/150Hz
