Cambridge Audio 840C Control Bus, Digital outputs, Digital Inputs 1, Unbalanced Audio Out

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840C Upsampling compact disc player

6Control Bus

In - Allows un-modulated commands from multi-rooms systems or other components to be received by the unit.

Out - Loop out for control bus commands to another unit.

7Digital outputs

The digital outputs allow a separate DAC or digital recording device to be connected. The sophisticated DSP software in the 840C even allows these outputs to be set to output raw (pass through) or upsampled data independently from the main audio outputs. Refer to the ‘Operating instructions’ section for more information.

S/P DIF CO-axial Digital - To obtain best results, use a high quality 75 ohm digital RCA interconnect cable (not one designed for normal audio use).

Toslink Optical Digital - Use a high quality TOSLINK fibre optic interconnect cable designed specifically for audio use.

Only one of the two output types should be used at a time.

8& 9 Digital Inputs 1 / 2

The digital inputs allow the digital outputs of other source components to be connected to the 840C. The 840C can then act as a very high quality upsampling DAC, improving the sound quality of the connected sources. Two digital inputs allow two external sources to be connected:

S/P DIF CO-axial Digital - Use a high quality 75 ohm digital RCA interconnect cable (not one designed for normal audio use).

Toslink Optical Digital - Use a high quality TOSLINK fibre optic interconnect cable designed specifically for audio use.

Only one of the two input types for each input should be used at a time.

10Unbalanced Audio Out

Single-ended conventional stereo outputs for connection to the line-level phono/RCA inputs of an amplifier.

11Balanced Audio Out

The 840C also features true balanced (XLR) outputs. This is a higher quality output that can reject noise and interference in the cable when used with equipment with balanced inputs. XLR connectors should be wired: Pin 1 - Ground; Pin 2 - Hot (in-phase); Pin 3 - Cold (phase- inverted).

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Contents Azur 840C Contents Introduction 840C Upsampling compact disc playerChecking the Power Supply Rating Safety PrecautionsImportant Note Important Safety InstructionsRear Panel Connections Power On/OffMains Voltage Selector Switch AC power socketUnbalanced Audio Out Control BusDigital outputs Digital Inputs 1Infrared sensor Front Panel ControlsStandby/On Select MenuStop DisplayOpen/Close Play/PauseRemote Control Remote Control of Matching Products Locating a specific track Operating InstructionsLoading and unloading discs Normal disc playPlaying tracks in a random order Using the Intro functionLocating a particular point in a track Repeating discs and tracksProgramming disc play Using the A-B functionUsing the Remain function Using the Space functionCD playback External Digital SourcesDigital Input 1/2 Menu structure CD Player SetupDigital out sample frequency Software version Digital out word widthDigital out dither Changing input names / source namingTroubleshooting Custom Installation C.I. USEDigital output sampling frequencies supported Technical SpecificationsLimited Warranty 840C Upsampling compact disc player Azur 840C

840C specifications

The Cambridge Audio 840C is a high-performance CD player and digital-to-analog converter (DAC) that has garnered attention from audiophiles and music lovers since its release. This player stands out for its blend of cutting-edge technology and elegant design, making it a sought-after component in many high-end audio systems.

One of the standout features of the 840C is its ability to handle a variety of digital sources. It includes inputs for USB, coaxial, and optical connections, allowing users to easily integrate it with their digital audio devices. This versatility ensures that the 840C can serve as a central hub for a modern audio setup, including direct connections to computers, tablets, and other digital sources.

At the heart of the 840C is Cambridge Audio's proprietary "ATF" (Adaptive Time Filtering) technology. This innovation upscales lower-resolution digital audio to 24-bit/192kHz, enhancing the overall sound quality and allowing listeners to experience their music in greater depth and detail. This technology, combined with a highly regarded Wolfson DAC, ensures that the 840C delivers exceptional audio performance that captures the nuance and dynamics of any musical genre.

The 840C also boasts a precision clocking system, which minimizes jitter – a common issue in digital audio that can compromise sound quality. By ensuring more accurate timing of the audio signal, the 840C creates a more coherent soundstage and improves the overall listening experience.

Another notable aspect of the 840C's design is its robust construction. Built with high-quality components and a solid chassis, this player not only minimizes internal vibration but also ensures durability. The aesthetically pleasing brushed aluminum finish adds to its appeal, allowing it to fit seamlessly into a variety of audio setups.

Audio enthusiasts will appreciate the 840C's user-friendly interface, which makes navigation through tracks, playlists, and settings straightforward. The remote control further enhances usability, offering quick access to essential functions.

In summary, the Cambridge Audio 840C is an exemplary piece of audio equipment that combines advanced technology with high-quality sound reproduction. Its versatile outputs, state-of-the-art DAC capabilities, robust design, and user-friendly operation make it an ideal choice for anyone looking to elevate their audio experience. Whether enjoying CDs or streaming high-resolution digital files, the 840C promises to satisfy even the most discerning listeners.
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