Arcam FMJ P777 Посібник - Сторінка 8

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1. Specifications

speakers

Speaker placement

The P777 allows connection of up to seven

loudspeakers. All speakers, with the exception of the

subwoofer, should be arranged around your normal

viewing/listening position (see diagram). The subwoofer

can be placed almost anywhere and we recommend

experimenting with it in various positions to obtain the

best result.

The closer you place a speaker to intersecting room

surfaces (corners, wall and ceiling, wall and floor),

the stronger the bass output. This can help bass-shy

speakers, but it can also add too much bass. Again, just

moving a speaker a few inches can often make a big

difference in sound.

Position your front left (L) and right (R) speakers

to achieve a good stereo image for normal musical

reproduction. If they are placed too close together there

will be a lack of spaciousness. Alternatively if they are

placed too far apart the stereo image will appear to have

a hole in the middle and will be presented in

halves.

The centre speaker (C) allows for a more

realistic reproduction of dialogue and

centre sounds as well as wider and

better imaging for stereo effects

and background sounds for

home cinema use. Do not

compromise on the quality

of your centre speaker as it

carries all the dialogue for a

home cinema system.

The surround left (SL) and right (SR) speakers

reproduce the ambient sound and effects present in a

multichannel home cinema system.

The surround back left (SBL) and surround back right

(SBR) speakers are used to add extra depth, a more

spacious ambience and sound localisation.

A subwoofer (SW) will greatly improve the bass

performance from your system. This is useful for

reproducing special cinema effects, especially where

a dedicated LFE (Low-Frequency Effects) channel is

available, as with Dolby Digital or DTS Digital Surround

encoded discs.

two

SBL

SBR

Speaker wiring options

Single wiring

Single wiring is the conventional wiring method of

running a single cable per channel between the amplifier

and the speaker; this is the easiest technique.

bi-wiring

Bi-wiring is running two separate cables between the

amplifier and each speaker, with one cable carrying

the low-frequency information, the other the higher-

frequency signals.

Bi-wiring can improve the sound of your system because

the separation of high- and low-frequency signal

currents into different speaker cables avoids distortions

caused by the different currents interacting with one-

another within a single cable, as occurs in single-wired

systems.

The P777 is designed to allow easy bi-wiring, but you

will need to connect to loudspeakers that provide

separate terminals for the two cables. Each speaker

must have two pairs of terminals; one pair labelled

or 'High Frequency' , the other pair labelled

Frequency' .

bi-amping

Bi-amping is the separation of the amplification of

low- and high-frequency signals over two amplifiers.

Bi-amping requires the use of two amplifiers per

channel.

E-6

notes on making speaker

connections

Do not make any connections to any amplifier

while it is switched on. We recommend that

your amplifier is completely disconnected

from the mains supply before starting.

Before switching your amplifier on for the

first time after connecting to speakers, please

check all connections thoroughly. Ensure

that bare wires or cables are not touching

each other or the amplifier's chassis (which

could cause short circuits), and that you

have connected positive (+) to positive and

negative (–) to negative. Be sure to check the

wiring for both the amplifier and the speaker.

After making connections: switch the

amplifier on, with the pre-amplifier volume

set to a low setting. Select a source signal, then

gradually increase the volume to the required

listening level.

or 'Low

If you are unsure as to how your system

should be connected, or need advice on

bi-wiring or bi-amping, please contact your

Arcam dealer who will be happy to help you.