CX-A450 Amplifier Installation & User Guide V3.0 Cloud Electronics Limited 140 Staniforth Road, Sheffield, S9 3HF England Tel +44 (0) 114 244 7051 Fax +44 (0) 114 242 5462 E-Mail: info@cloud.co.uk Web site: http://www.cloud.co.
CX-A450: Installation and Operation Manual 1 CX-A450 Amplifier Installation and operation manual Contents Section Page 1 Safety Notes ....................................................................................................... 2 2 General ............................................................................................................... 2 3 Installation ..........................................................................................................
CX-A450: Installation and Operation Manual 2 1 Safety Notes • • • • • Do not expose the unit to water or moisture Do not expose the unit to naked flames. Do not block or restrict any air vent Do not operate the unit in ambient temperatures above 35oC Do not touch any part or terminal carrying the hazardous live symbol ( ) while power is supplied to the unit.
CX-A450: Installation and Operation Manual 3 5 Input Routing Diagrams 4 independent mono amplifiers Fig 1 4 mono outputs fed from 1 mono input Fig 2 2 stereo amplifier pairs fed from 1 stereo input pair Fig 3 6 Output Details Four 2-pole plug-in screw terminal type connectors (5mm pitch) are provided on the rear panel for the four speaker outputs; these can accommodate flexible leads up to 2.50mm². Do not make any connections to the unit with the power cable attached.
CX-A450: Installation and Operation Manual 4 CH4 0V CH3 CH2 0V MINIMUM LOAD 4OHMS OUTPUT RATING 50W/4OHMS 0V CXL-40T Wired to Channel 4 SPEAKER OUTPUTS An optional four-channel, internally mounted 40W, 70V/100V-line transformer module (CXL-4160) is available for the CX-A450. The installer can select 70 or 100V 100V operation when installing the CXL-4160 by means of soldered links on the underside of the PCB.
CX-A450: Installation and Operation Manual 5 The output load should then be connected between the two positive (HOT) outputs of the relevant channels (no connection to 0V). You must ensure that the positive wire is connected to the "first channel" output and the negative wire is connected to the "second channel" output (see fig 6). 9 Status Indicators The front panel of the CX-A450 has an array of LED’s that indicate the status of all four channels (see Fig 7).
CX-A450: Installation and Operation Manual 6 4. Unscrew the relevant blanking plate from the rear of the unit & retain the screw. 5. Adjacent to the connector there is an M3 fixing screw remove & retain this screw then fit a 35mm M3 hex spacer (supplied) in its place. 6. Push the 10-way VCA plug onto the PCB connector, aligned so the cable enters it from the rear of the chassis (See Fig 9) check there is contact with all 10 pins. 7.
CX-A450: Installation and Operation Manual 15 7 Equalisation Module Installation 1. Turn the power off and remove the mains lead. 2. Remove the top panel from the unit. 3. Select the required PCB connector (see list below) that you wish to install the equalisation module to and remove the bypass jumper adjacent to it. 4. 5. 6. 7.
CX-A450: Installation and Operation Manual 8 VCA Module THD+N Crosstalk Typical, between adjacent channels <0.03% 1kHz, measurement BW 22Hz to 80kHz Input Sensitivity Input Impedance Noise 0dBu (775mV) 10k balanced / 5k unbalanced <96dB rms below rated output, un-weighted, measurement BW 22Hz to 22kHz 230V ±5% (115V ±5% available) 230V – T3.15A H 115V – T6.
CX-A450: Installation and Operation Manual 9 Safety Considerations and Information The unit must be earthed. Ensure that the mains power supply provides an effective earth connection using a three wire termination.
