Operating instructions

The 840A V2 has a custom-made display on the front of the unit showing the current status and allowing you to access the 840A V2 System Configure menus. Here you can adjust the listening settings of the amplifier to personal preference. The menu system is easy to navigate and control, simply by using the input select buttons to turn a feature on (solid circle) or off (no circle) and the volume control knob to increase/decrease settings.

Volume

Mode

Volume

Adjust the volume control knob on the front panel (or using the remote control). The display will show the change in volume in decibels (dB). ‘OdB’ indicates maximum volume while lower volume settings progress into the negative range. This can also be changed to volume units (0-96) in the System Configure menu.

Speaker A/B

Speaker A/B

Volume

Press the Speaker A/B button to scroll through the speaker sets connected via the rear panel: speakers A, B or A and B.

Balance

Mode

Volume

Press the Mode button to enter Balance mode. BALANCE will appear on the display and can be adjusted using the volume control. Press the Mode button again to return to Volume mode or wait 5 seconds for the 840A V2 to automatically exit Balance mode.

Bass and Treble

These controls allow subtle adjustments to the tonal balance of the sound. Modify the sound through your loudspeakers and the Pre-Out sockets only; they do not affect the signals sent through the Tape Out connections. With a well produced CD and a good system the tone controls are unnecessary and can be switched out by pressing the Direct button:

Bass Treble Direct

This completely removes them from the signal path for maximum fidelity. If the musical recording is of poor quality or other factors are affecting the sound quality, if desired you can adjust the tone controls to compensate. To use the tone controls press the Direct button so that the Bass/Treble icon ( ) lights in the display indicating that they are active and direct mode is Off. Now press the Bass or Treble controls themselves to release them and allow adjustment; push them back in when finished:

Bass Treble Direct

The 840A V2 stores whether direct mode is on or off for each input individually, for example it is possible to have the tone controls automatically active for the Tuner source but not the CD source.

Amplifier setup

The 840A V2 features many advanced settings that allow it’s use to be customised to user preference. The inputs can be named to reflect the actual source units you have, each input can be trimmed so that each sounds the same in terms of loudness when you switch between them and other options.

Changing input names / source naming

Mode

Volume

Press and hold the relevant input select button for four seconds to change its name. For example, if Input 1 is a CD player, name it “CD” etc. Letters are selected by turning the volume control to scroll through the available characters. Press LEFT or RIGHT to select which character you wish to edit. Press EXT CHAR to access an extended character set. Press OK to confirm and exit the input name change menu.

System Configure menu

Mode

Volume

Press and hold the Mode button to access the System Configure menu. The menu options are Clip detector, LCD brightness, Speaker short detector, Input gain trim, Volume ramp, Volume display, Front IR and Fixed input gain.

To exit the System Configure menu and its sub-menus, press the Mode button again.

Clip detector / Speaker short detector

Refer to the ‘CAP5’ section of this manual for more information on the Clip and Short detection features of the 840A V2, as both can be enabled (default) or disabled.

LCD brightness

Mode

Volume

In the System Configure menu press the LCD input select button to scroll through bright/dim/off settings for the front panel display. Press the Mode button to exit.

Volume ramp

Mode

Volume

The 840A V2 automatically ramps the volume down when going into Standby mode and up when coming out of Standby mode. To turn this feature off, press the VOL RAMP input select button in the System Configure menu and set to off. Press the Mode button to exit.

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Cambridge Audio 840A V2 user manual Operating instructions, Amplifier setup

840A V2 specifications

The Cambridge Audio 840A V2 is a high-end integrated amplifier that stands out in the realm of audio equipment, delivering both exceptional sound quality and sophisticated design. This amplifier embodies the brand's philosophy of providing a genuine listening experience that captures the essence of music.

One of the key features of the 840A V2 is its Class XD amplification technology. This unique design combines the best aspects of Class A and Class AB amplification, allowing for low distortion while maintaining high efficiency. This ensures that the amplifier can deliver potent power to drive a wide range of speakers without compromising on audio fidelity. The Class XD design allows the amplifier to operate in Class A mode at low power levels, delivering warmth and detail, while switching to Class AB at higher power levels for greater efficiency and headroom.

The 840A V2 boasts a robust construction that not only enhances durability but also minimizes resonance and vibration, contributing to cleaner sound reproduction. With a meticulous attention to detail, the amplifier features a symmetrical layout, which aids in reducing unwanted noise and crosstalk. The use of premium components throughout the signal path ensures that the audio remains true to the source.

One of the most appealing aspects of the 840A V2 is its extensive connectivity options. It includes multiple RCA inputs, a dedicated phono stage for vinyl enthusiasts, and balanced XLR inputs, making it versatile enough to accommodate various audio sources. The headphone output is powered by a dedicated circuit, ensuring that headphone listening experiences are equally exquisite.

Additionally, the 840A V2 incorporates a high-quality remote control that allows users to conveniently adjust volume levels and switch between sources from a distance. The front panel features a clear display and intuitive controls which makes operating the amplifier straightforward, even for those who might be new to high-fidelity audio equipment.

In summary, the Cambridge Audio 840A V2 integrated amplifier is an exemplary piece of audio engineering. With its Class XD technology, premium build quality, versatile connectivity, and user-friendly design, it offers audiophiles and casual listeners alike the opportunity to experience their music in an immersive and dynamic way. Whether paired with high-end speakers or used in a modest setup, the 840A V2 delivers a performance that reflects Cambridge Audio’s commitment to sound excellence.