Manual Arcam P777 (page 4 of 50) (English, German, Dutch, French)

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installation

Overview

e P777 Multichannel Power Amplier is built

to Arcam’s traditional high quality design and

manufacturing standards. It is an extremely high-

performance multichannel power amplier obviously

well suited to multichannel home cinema amplication,

although it also provides superb quality stereo

performance with two-channel sources. e P777 is an

ideal partner for the FMJ AV888 Pre-amp Processor.

Each power amplier module is identical, and is

electrically isolated from the other modules by opto-

isolated circuitry which ensures that each amplier

module has its own isolated supply. is allows the

amplier to give excellent channel separation and very

low distortion.

e P777 also has input and output phono sockets

for the signal being fed to each channel, to allow the

signal to be passed on to additional power ampliers

to drive loudspeakers in other rooms or to bi-amplify

any of the speakers. If the P777 is being used to drive

a ve-channel surround sound system, then the spare

two modules (SBL and SBR) can be used in conjunction

with the main (L and R) modules to bi-amplify suitable

front le and right speakers.

e customised installation of the P777 to a listening

room is an important process which requires care at

every stage. For this reason, the installation information

is very comprehensive and should be followed carefully.

is manual has been written with the assumption that

the installer is familiar with the installation of high-end

audio/video systems.

Placing the unit

< Place the P777 on a level, rm surface, avoiding

direct sunlight and sources of heat or damp.

< e P777 is a powerful amplier and a source of

considerable heat output when driven hard. Take

this into consideration when placing the unit.

< Do not place the unit in an enclosed space such as

a bookcase or closed cabinet unless there is very

good provision for ventilation.

< Do not place any other component or item on top

of the P777 as this may obstruct airow around

the unit, causing the P777 to run hot.

< Do not place your record deck on top of this

unit. Record decks are very sensitive to the noise

generated by mains power supplies which will be

heard as a background ‘hum’ if the record deck is

too close.

Room acoustics

e shape of your room and how it’s furnished will aect

the sound you hear. For instance, too many bare surfaces

can cause reections that may add harshness to the

sound. Adding carpeting and drapes can help.

If you have a choice of rooms, avoid ones that are

perfectly square or have one dimension exactly twice

another. ese rooms can aggravate resonances that

colour the sound.

12V Trigger input

If your pre-amp provides a 12V Trigger output, it can

be connected to the 12V TRIGGER IN socket using a mono

3.5mm jack. is enables the P777 to be turned on

remotely from the pre-amp.

tip: 12V trigger signal

sleeve: ground

Note that the trigger input is only active when the

central power button on the front panel is depressed.

In normal use there is no need to make any connections

to this input.

Power

e P777 is supplied with a moulded mains plug already

tted to the lead. Up to 3kW is drawn at maximum

levels, so a heavy duty IEC mains cable is supplied.

Check that the plug supplied ts your supply – if your

mains supply voltage or mains plug is dierent, or you

need a new mains lead, please contact your Arcam

dealer.

Push the IEC plug end of the power cable into the socket

on the back of the P777, making sure that it is pushed in

rmly. Plug the other end of the cable into your mains

socket and, if necessary, switch the socket on.

Connecting to a pre-amplifier

Two dierent connection types are provided for

receiving signals from your pre-amplier: phono

sockets and XLR connectors. e connection type to use

depends on the set-up that you have.

< If the cables to be used to connect your pre-

amplier to the P777 are less than 3m long, we

recommend connecting your pre-amplier to the

AUDIO IN phono (RCA) sockets of your P777. To

use the phono connections, make sure that all the

channel input switches are not depressed.

< If the cables to be used to connect your pre-

amplier to the P777 are 3m or longer and your

pre-amplier has balanced XLR outputs, we

recommend using these instead of the phono

(RCA) connections. Performance will also be

improved in electrically-noisy environments

by using these connections. To use the XLR

connections, make sure that the

INPUT SELECT

switches are depressed for each channel.

Pin Function

1 Chassis ground (cable shield)

2 ‘Hot’ (normal polarity)

3 ‘Cold’ (inverted polarity)

Female XLR Male XLR

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Arcam P777 Manual

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