Cloud Electronics 46-50 - Manual (Page 26)

46-50 Installation and User Guide V1.0 26
EMC considerations
The Cloud 46-50 fully conforms to the relevant electromagnetic compatibility (EMC) standards and is technically well behaved;
you should experience no operational problems and under normal circumstances, no special precautions need to be taken.
If the unit is to be used within close proximity to potential sources of HF disturbance such as high power communications
transmitters, radar stations and the like, the performance of the mixer may be reduced; we suggest that the microphone cable
screen be connected to the shell of the XLR type connector and the line input leads are kept as short as possible.
Ground loops
If, despite your best efforts, the completed sound system ‘hums’ you probably have a ‘ground loop’. The offending signal source
can often be identified by setting the volume control to minimum, then disconnecting the input leads (both left & right channels)
on each line input until the ‘hum’ disappears. This problem is often caused by terminating a screened input cable into a signal
source positioned a significant distance from the mixer. A good way of avoiding this potential problem is to use signal sources
(typically ‘consumer’ equipment) that are double insulated with no connection to the mains supply earth. If a signal feed were
derived from a second mixer (a club or microphone mixer for example) it would be perfectly normal to expect this to be
earthed; we suggest that a transformer be used to isolate the signal and prevent a noisy loop (see page 13).
TECHNICAL SPECIFICATIONS
Technical specifications
Line Inputs
Frequency Response
20Hz – 20KHz +/-0.5dB
Distortion <0.03%, 20 Hz to 20 kHz
Sensitivity 195 mV (-12 dBu) to 2.0 V (+8 dBu)
Input gain control range 20 dB
Input Impedance 47 kohms
Headroom >20 dB
Noise -90 dB (0 dB gain, 22 Hz to 22 kHz)
Equalisation HF: ±10 dB @10 kHz; LF: ±10 dB @ 50 Hz
Microphone Inputs
Frequency Response
100 Hz -3 dB (fixed filter) to 20 kHz ±0.5 dB
Distortion <0.05%, 20 Hz to 20 kHz
Gain Range 0 dB to 50 dB
Input Impedance >2 kohms (balanced)
Common mode rejection >70 dB @ 1 kHz
Headroom >20 dB
Noise -128 dB EIN, 22 Hz to 22 kHz (Rs = 150 ohms)
Equalisation HF: ±10 dB @ 5 kHz; LF: ±10 dB @ 100 Hz
Outputs
Low Impedance
Outputs
4 ohm load 50 W
8 ohm load 35 W
Auxiliary Outputs (Zones 1 & 2) 0 dBu (unbalanced)
100 V-line Output* 100 V balanced – 250 ohm min. load
70 V-line Output* 70 V balanced – 125 ohm min. load
Amplifier protection
Dynamic Clip Protection, VI Limiting, DC Offset, thermal & switch-on
delay
Cooling Variable speed DC fan
* with optional CXL-4160 module fitted internally