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In  another  situation,  it  might  be  necessary  to  route  the  same 
audio  to  several  different  zones,  but  allow  each  zone  to  adjust 
its own level. This can be easily achieved by providing each zone 
with a Cloud RL-1 remote volume control plate, and setting the 
amplifier’s input routing to parallel all the channels. Only a single 
input feed needs to be supplied, to Channel 1

System Example

CX-A450  and  CX-A850  amplifiers’  exceptional  crosstalk 
performance  make  them  particularly  suitable  for  any  application 

where different audio sources need to be routed to various zones 
(parts of a building). They are equally suitable in a situation where a 

common audio source needs to be reproduced at different levels in 
various zones.  The flexibility of the amplifiers’ input routing makes 
it possible to handle a mixture of mono and stereo sources without 

complex wiring.

In many applications, the power amplifiers will be used in combination 
with a Cloud Zoner, to permit paging and emergency override. An 

example  is  the  CX263  zoner,  which  supports  three  zones,  one  of 
which may be stereo. In the example shown below, where a CX263 

is used with a CX-A450, Chs. 1 & 2 are used to drive stereo to Zone 
1, while Chs. 3 & 4 are used for the mono signals to Zones 2 and 3 
respectively.

Similar  mono-stereo  arrangements  are  possible  with  the  Cloud 

CX163 and Z4

II

 zoners.

Summary of Contents for CX-A450

Page 1: ...lso available To prevent LF transformer saturation in 100V 70V line systems a 65 Hz high pass filter may be enabled for each channel individually by internal jumper Other standard options are Cloud RL 1 remote volume control plates the VCA 5 single channel VCA card required for level control by RL 1 and EQ cards to suit various makes and models of loudspeakers Remote level control or speaker EQ ma...

Page 2: ...ion Pairs of channels may be operated in Bridge Mode Per channel front panel LEDs for signal presence peak level and protection status Balanced line level inputs with gain trim Rear panel switches to configure for multichannel stereo or mono operation Optional internal 4 channel 100 V 70 V transformer module CX A450 only Optional externally mountable 100 V 70 V transformers per channel Optional re...

Page 3: ...e r s o u n d Input Routing The input routing switches of the CX A450 and CX A850 permit various permutations of mono stereo and multi channel operation without any external parallel wiring Some possibilities are shown below ...

Page 4: ...d to various zones parts of a building They are equally suitable in a situation where a common audio source needs to be reproduced at different levels in various zones The flexibility of the amplifiers input routing makes it possible to handle a mixture of mono and stereo sources without complex wiring In many applications the power amplifiers will be used in combination with a Cloud Zoner to perm...

Page 5: ...p Trace Line Style Thick Data Axis Comment 1 1 Red Solid 1 Anlr Bandpass Left CH2 to CH1 100 0 80 60 40 20 d B r 20 20k 50 100 200 500 1k 2k 5k 10k Hz T T Audio Precision 05 31 11 13 23 50 CX A850 Crosstalk Color Sweep Trace Line Style Thick Data Axis Comment 1 1 Red Solid 1 Anlr Bandpass Left 100 0 80 60 40 20 d B r 20 20k 50 100 200 500 1k 2k 5k 10k Hz T Audio Precision 05 31 11 13 11 59 CX A450...

Page 6: ...stalk 70 dB rel rated output into 4 ohms 10 kHz 82 dB rel rated output into 4 ohms 10 kHz VCA module THD N 0 03 1 kHz 22 Hz 80 kHz BW Inputs Type connectors Electronically balanced 3 pin 3 5 mm pitch screw terminal connectors Sensitivity 0 dBu 0 775Vrms Input Impedance 10 kohms balanced General Output Connectors lo Z 2 pin 5 mm pitch screw terminal connectors Output Connectors 100 70 V Screw termi...

Page 7: ...ency of 65 Hz independently in each amplifier channel Each channel shall deliver its rated power from an input signal of 0 dBu with input level controls set at maximum Output mute protection on power up and thermal protection shall be provided The amplifiers will also be protected against short circuits at the output and excessive combination of output voltage and current The amplifiers outputs sh...

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