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Advanced Visual Solutions Ltd
Unit 2, Eastman Way
Hemel Hempstead, Hertfordshire HP2 7DU
Telephone : ( 01442 ) 252280
Fax : ( 01442 ) 244578
Email : sales@avsl.com : Website : avsl.com
Model CDAMP20MB1
20 Watt Class "D"
Amplifier Module
Installation and
Operating Instructions
DOCUMENT NUMBER CDAMP20MB1/OEM/01
REVISION 1.1
30th November 2008
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Table of Contents
Summary of Contents for Advanced Visual Solutions CDAMP20MB1
- Page 1 Advanced Visual Solutions Ltd Unit 2, Eastman Way Hemel Hempstead, Hertfordshire HP2 7DU Telephone : ( 01442 ) 252280 Fax : ( 01442 ) 244578 Email : sales@avsl.com : Website : avsl.com Model CDAMP20MB1 20 Watt Class “D” Amplifier Module...
- Page 2 Page 6 TESTING USING A PERSONAL STEREO DEVICE (e.g.MP3 Player) Page 7 PCB SWITCHES & VOLUME CONTROL LOCATIONS Page 8 GAIN TABLE & SWITCH SETTINGS DETAIL Page 8 DOCUMENT NUMBER CDAMP20MB1/OEM/01 REVISION 1.1 30 November 2008 Page 2 of 8...
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Page 3: Safety Precautions
• Do not stand on, nor hang from the unit as this may cause it to fall or drop, resulting in personal injury and/or property damage. DOCUMENT NUMBER CDAMP20MB1/OEM/01 REVISION 1.1 30 November 2008... -
Page 4: System Overview
Operating at Voltages lower than 18 Volts will reduce the maximum power output (e.g. at 12 Volts DC the maximum power output is approximately 8 Watts RMS into an 8 Ohm load or 12 Watts RMS into a 4 Ohm load. DOCUMENT NUMBER CDAMP20MB1/OEM/01 REVISION 1.1 30 November 2008... -
Page 5: Installation
If the loudspeaker’s polarity is reversed (out of phase), the system will appear to operate fine, but all loudspeakers should be connected in-phase, in order to maintain good intelligibility throughout. 18 V DC +V 18 V DC 0V 8Ω Speaker + 8Ω Speaker - DOCUMENT NUMBER CDAMP20MB1/OEM/01 REVISION 1.1 30 November 2008 Page 5 of 8... - Page 6 See that the screen (drain) of the audio cable is connected to Earth at the source end. This usually achieved by the source equipment, if it is mains-powered, but you should check this. You must ensure that the jumper “J1” is closed (Short Circuit) or severe hum may result DOCUMENT NUMBER CDAMP20MB1/OEM/01 REVISION 1.1 30 November 2008...
- Page 7 The gain and volume controls are on the PCB inside the unit (see drawing on next page). hese should be set during commissioning, using the audio from the system’s source device. DOCUMENT NUMBER CDAMP20MB1/OEM/01 REVISION 1.1 30 November 2008...
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Page 8: Technical Support
TECHNICAL SUPPORT Advanced Visual Solutions Ltd provide full technical support for our products. We have two, fully equipped “central station” workstations, running the latest version of ADPRO video central gold software and HEITEL monitoring software. We can therefore connect to ADPRO or HEITEL remote transmitters, providing that they are on standard PSTN telephone lines (modem), standard ISDN lines (terminal adapter) or standard ADSL (broadband) connections.
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