Arcam FMJ P777 Manuale - Pagina 6

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1. Specifications

installation

overview

The P777 Multichannel Power Amplifier is built

to Arcam's traditional high quality design and

manufacturing standards. It is an extremely high-

performance multichannel power amplifier obviously

well suited to multichannel home cinema amplification,

although it also provides superb quality stereo

performance with two-channel sources. The P777 is an

ideal partner for the FMJ AV888 Pre-amp Processor.

Each power amplifier module is identical, and is

electrically isolated from the other modules by opto-

isolated circuitry which ensures that each amplifier

module has its own isolated supply. This allows the

amplifier to give excellent channel separation and very

low distortion.

The 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 amplifiers

to drive loudspeakers in other rooms or to bi-amplify

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

a five-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 left and right speakers.

The 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.

This 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, firm surface, avoiding

direct sunlight and sources of heat or damp.

The P777 is a powerful amplifier 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 airflow 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

The shape of your room and how it's furnished will affect

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

can cause reflections 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. These 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

socket using a mono

12V TRIGGER IN

3.5mm jack. This 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.

E-4

Power

The P777 is supplied with a moulded mains plug already

fitted 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 fits your supply – if your

mains supply voltage or mains plug is different, 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

firmly. Plug the other end of the cable into your mains

socket and, if necessary, switch the socket on.

Connecting to a pre-amplifier

Two different connection types are provided for

receiving signals from your pre-amplifier: phono

sockets and XLR connectors. The connection type to use

depends on the set-up that you have.

If the cables to be used to connect your pre-

amplifier to the P777 are less than 3m long, we

recommend connecting your pre-amplifier to the

phono (RCA) sockets of your P777. To

AudIo IN

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-

amplifier to the P777 are 3m or longer and your

pre-amplifier 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.

Female XLR

Male XLR

Function

Chassis ground (cable shield)

'Hot' (normal polarity)

'Cold' (inverted polarity)