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bowerswilkins.com

Welcome to Bowers & Wilkins and CDA-4D

Thank you for choosing Bowers & Wilkins. When John Bowers first established 
our company, he did so in the belief that imaginative design, innovative 
engineering and advanced technology were keys that could unlock the enjoyment 
of audio in the home. His belief is one that we continue to share and inspires 
every product we design, tailored for new audio experiences inside of the home.

CDA-4D distribution power amplifier can drive any Bowers & Wilkins custom 
installation speaker to new heights of performance. Offering 4 channels of high 
quality amplification, the CDA-4D can enable your home with sound yet takes 
up minimal space thanks to its compact 1U design. CDA-4D configuration also 
supports bridging of its Class D stereo channels into even more powerful mono 
outputs, if needed. CDA-4D can be easily setup via the Product Configuration 
page which allows customisable complex DSP tuning, offering wider flexibility 
and integration offering to your installation.

Features

•   4 channel amplification in 2 zones with 125 watts 

per channel delivering high-resolution audio.

•   Engineered to work with Bowers & Wilkins installation 

speakers and subwoofers.

•   Highly flexible usage / configuration – Left/Right outputs can be bridged 

to provide a mono output of double the power at 250 watts.

•   Three power mode control options – on, auto detect or 12V trigger.

•   Robust and reliable protection features, preventing damage 

due to overload, short circuits or heat.

•   Ultra-compact rack-mount design (1 rack unit).

•   Product Configuration page allows customisable setup 

for various use case configuration.

•   Audio Video Bridging (AVB) compatible*.

*AVB is available when two or more Bowers & Wilkins CDA amplifiers (CDA-2HD or CDA-4D) 
are connected to the same wired network using AVB enabled network hardware (AVB enabled switch). 
Analogue or digital input sources from other CDA amplifiers can be selected as an input source.

AVB is a set of standards whose implementation varies from manufacturer to manufacturer. 
As such we cannot guarantee AVB compatibility between Bowers and Wilkins devices 
and other equipment or network hardware.

Note:

 Always check for the latest software 

on the Bower & Wilkins website.

Summary of Contents for CDA-4D

Page 1: ...CDA 4D Distribution Amplifier...

Page 2: ...our installation Features 4 channel amplification in 2 zones with 125 watts per channel delivering high resolution audio Engineered to work with Bowers Wilkins installation speakers and subwoofers Hig...

Page 3: ...tuer les connexions Unit fuses may only be changed by skilled personnel fuse may be in the neutral mains should be disconnected to de energize the phase conductor Les fusibles de l appareil ne peuvent...

Page 4: ...the ventilation apertures are not obstructed If the system is taken out of use for a long period disconnect the amplifier from the mains power supply The CDA 4D is supplied with two rack mounting ears...

Page 5: ...s LEDs 3 1 Reset Button Using the factory reset can erase all setting and revert the amplifier back to the factory flashed firmware Reboot This allows the device to gracefully shut down and restart a...

Page 6: ...le on the network to other Bowers Wilkins CDA devices see Diagram 6 Refer to section 7 2 1 on how to setup your amplifier Analogue Input Primary Analogue Inputs 1L 1R Use these inputs for primary audi...

Page 7: ...erly Check the polarity of the speakers and wires before connecting to the amplifier To connect bridged tied load speakers see Diagram 10 1 Select BRIDGE TIED LOAD in the Product Configuration Page 2...

Page 8: ...ser 5 Enter the CDA 4D default network address product name serial number for example http cda 4d_XXXX xxxxxxx local in the browser address field and press return This will open the Product Configurat...

Page 9: ...al amplifier settings The following section will take you through each of the functions on this tab 7 1 1 Information In this section the user can add a name for the CDA 4D amplifier and enter the ins...

Page 10: ...is set to Auto Detect ON In this mode signal sense and 12V Trigger are turned off The amplifier will always stay on AUTO DETECT This mode uses signal sense to turn the amplifier on 12V TRIGGER In thi...

Page 11: ...cted alerts are triggered 7 1 6 Settings Management Import Restore and Export Settings The Import Restore and Export button allows you to import and export saved settings from a location from your com...

Page 12: ...2 Input Output Settings In the Input Output Settings tab configuration of the routing for each input to a selected output can be made here Mode of use individual trim level and volume parameters can...

Page 13: ...g devices are able to recognise each other on the network The sibling device will be shown in the INPUT SOURCE drop down with the serial number or friendly name of the device shown in the list You wil...

Page 14: ...type of Bowers Wilkins products available for selection in the next section Examples of the mode and configuration Bridge Tied Load Mode When more power is required two channels can be bridged into o...

Page 15: ...5 Output Source Priority Source 1 This is the primary source you will direct to the speakers Left inputs default to left outputs and right inputs to right outputs Source 2 This is used as a secondary...

Page 16: ...CDA 4D is designed to provide the best audio quality when used with Bowers Wilkins speakers When a third party product is being used select an User Preset in the Speaker selection Fine adjustments ca...

Page 17: ...17 ENGLISH Third party products when a User Preset is selected...

Page 18: ...opdown before choosing an action import export IMPORT single preset allows importing of the selected presets from a computer EXPORT single preset allows saving the selected preset from the amplifier t...

Page 19: ...increase or decrease the gain at selected frequency Filter Type Filter Type available Parametric High Shelf or Low Shelf Crossover This is where High Pass HP or Low Pass LP crossover filters can be ap...

Page 20: ...e Registration Evaluation Authorisation and restriction of Chemicals REACH and the disposal of Waste Electrical and Electronic Equipment WEEE Consult your local waste disposal authority for guidance o...

Page 21: ...V trigger input threshold typically 3V recommended input is 5 15V Controls Indicators Front panel 1 x Power LED Unit active White Fault Red 1 x Network status LEDs Network present White Fault Red 2 x...

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