Cambridge Audio 551R User Manual

Front panel controls

Standby/On

Switches the unit between Standby mode (indicated by a dim power LED) and

On (indicated by a bright power LED). Standby is an eco-friendly <1W low

power mode. The unit may be left in Standby mode when not in use.

Phones

Allows for the connection of stereo headphones with a 6.35mm/¼" Jack

plug. Headphones with an impedance of between 32 and 600 ohms are

recommended.
Note: Plugging in headphones will automatically mute the main and pre-amp

outputs and select a 2-channel stereo down-mix to be created for headphone

use.

Tuning +/-

Used to tune FM/AM frequencies and skip presets for the built-in Tuner.

Mode/Store

Press to cycle between Tuner modes. Press and hold for storing presets (refer

to the ‘Operating Instructions’ of this manual for more information).

Display

Displays the status of the unit.

BD/DVD

Press to select the source equipment connected to the BD/DVD input.

Video 1

Press to select the source equipment connected to the Video 1 input.

Video 2

Press to select the source equipment connected to the Video 2 input.

Video 3/MP3

Press to select the source equipment connected to the Video 3 or MP3 input

(if a device is plugged into its 3.5mm mini-jack input).
Note: The L audio input is also used for the supplied auto setup microphone.

Refer to the ‘Auto setup’ section of this manual for more information.

Tuner FM/AM

Press to select the tuner. Once in Tuner mode press to switch between FM

and AM modes.

Tape/MD/CDR

Press to select the source equipment connected to the Tape/MD/CDR input.

CD/Aux/TV

Press to select the source equipment connected to the CD/Aux input.
With ARC enabled (see later section), press again to select Audio Return

Channel from a suitable TV.

7.1 Direct

Press to select a 7.1 or 5.1 source (DVD-A or SACD player etc) connected to

the 7.1 Direct In sockets.

Note: The 551R remembers the audio and video input type and processing

mode for each individual source input. These are recalled each time a source

is selected.

Audio input type

Press this button to select between analogue, digital (optical/coaxial) or HDMI

input types as the source of the audio for the currently selected source input.
The choices available depend on the inputs that have been assigned to that

source, see later section.

Stereo modes

Press to listen to a source in either digitally processed stereo or stereo and

sub modes.

Surround modes

Press to select Dolby Digital or DTS surround modes (with suitably encoded

digital source material), or various Pro Logic II/IIx, DTS Neo:6 modes for

matrix encoded analogue or digital material.

Picture Adjustment

Press to select various picture adjustments for sources that have the Scaler

set to Process only (see ‘Source setup’ section in the manual). An

adjustment bar will appear on the TV for the current item (Brightness,

Contrast etc.) Press the Pic. Adj. button again to move to the next item.
This button is also used to change the scaler output resolution. Press and

hold the button for 10 seconds and the current output resolution will appear

on the 551Rs front panel display. Keep holding the button down and the

551R will change to the next available resolution and show it on the front

panel display. See later section.

Mute/Info

Press to mute the sound from the main and pre-amp outputs of the 551R.

Press again to cancel mute.
Note: Selecting a new source always cancels mute.
Press and hold to re-display the current decoding mode.

Analogue Stereo Direct

Press to listen directly to the analogue inputs for the current source directly with

no analogue to digital conversion or DSP processing for highest possible stereo

sound quality.

Volume

Use to increase/decrease the level of the sound from the outputs of the 551R.

Infrared sensor

Receives IR commands from the supplied remote control. A clear,

unobstructed line of sight between the remote control and the sensor is

required.

Video 3 Input

For occasional use with camcorders or games consoles etc.

MP3 Input

This input can be used with the line or headphone outputs of portable music

players.