Cambridge Audio 551R User Manual

551R

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Rear panel connections

& FM/AM antennas

All tuner antenna connections are made here. Refer to the ‘Antenna

Connections’ section of this manual for more information.

Emitter In

Allows modulated IR commands from multi-room systems or IR repeater

systems to be received by the 551R.

Service/Normal

For dealer use only - Switches the 551R between normal (default) mode and

two Service modes. Do not change the mode to service or make RS232

connections to it in service mode as damage may result!

Composite and S-Video inputs

These may be freely assigned to any source, see later section.

RS232C

Used for control of the 551R in Custom Install situations. A full protocol is

available for the 551R on our website.

Analogue Audio inputs

For use with the line level outputs of CD players, BD/DVD players etc.

Tape/MD/CDR In / Out

For use with suitable recording devices. The output allows recording of the

currently selected analogue source.

Digital Inputs

S/P DIF or Toslink digital inputs for each source.
You can choose to use a different type for each source but do not connect

both at the same time for the same source.

Digital Outputs

S/P DIF and Toslink digital outputs for recording . The outputs allow recording

of the currently selected digital source.
These are concurrent and both can be connected at the same time.

7.1 Preamp Out

Connect to the 5.1/7.1 channel input terminals of another amplifier system,

separate power amps, subwoofer or active loudspeakers.

7.1 Direct In

Connect to the output terminals of a DVD-A, SACD player or other 5.1/7.1

analogue source.

Heat tunnel vent grille

Allows cooling of internal circuitry via the 551R’s proprietary X-TRACT heat

tunnel. DO NOT OBSTRUCT!

& HDMI

Inputs and output to a suitable TV/Monitor. The HDMI inputs can be assigned

in the OSD. By Default the HDMI inputs are assigned to BD/DVD, Video 1 and

Video 2, with the 4th input unassigned.
These inputs can be freely assigned, see later section on assigning video

inputs.
All video inputs whether analogue or HDMI are transcoded and output via the

HDMI output.

Component Video inputs

By default the component inputs are unassigned, these inputs can be freely

assigned, see later section on assigning video inputs.
Note: The preferred connection method for video inputs is always Composite

Video, then S-Video, then Component Video, then HDMI in ascending order

of quality (HDMI being the highest quality). HDMI and Component Video

sources often also support Progressive Scan which gives better picture

quality if supported by both your BD/DVD player and TV.

. Speaker terminals

Connect to loudspeakers with an impedance of between 4-8 ohms. 7.1, 5.1

or less connections can be made.

Power On/Off

Switches the unit on and off.

Mains power lead

Once you have completed all connections, plug the AC power lead into an

appropriate mains socket. The AV receiver is now ready for use.

ENGLISH