Bedienungsanleitung Harman Kardon AVR645 (Seite 21 von 68) (Englisch)

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INSTALLATION AND CONNECTIONS 21

ENGLISH

Installation and Connections

USB Connections

The AVR 645 is one of the few A/V receivers to

offer a USB connection that may be used for

both playback of compatible audio content from

a computer and for loading of system updates

(when available).

The physical connection between a computer and

the AVR is a simple one, requiring only a cable

with a USB “A” type connector on one side and a

USB “Mini B” on the other.

Connect the larger, “A” connector on the cable to

your computer or a USB hub and the end with

the “Mini” USB connector to the USB Jack

on the AVR’s rear panel.

NOTES ON USB:

• The USB jack on the AVR is for connection to a

computer, or to a hub connected to a comput-

er, only. DO NOT connect it directly to other

devices such as card readers, USB memory

storage devices, external hard drives, USB

accessories, digital cameras or cellular phones.

Connection to these devices may cause

damage to the device and/or the AVR that is

not covered by the AVR’s warranty.

• The AVR’s USB connection may only be used

for audio playback and system upgrades. It

may not be used for other purposes, such as

system control, video or still-image playback.

Trigger Jack Connection

The AVR is equipped with a low-voltage Amp

Trigger Jack

that may be used to activate

optional, external power amplifiers, screen

motors, motorized blinds or other compatible

products that may be part of a home theater

installation. Once the connections are made,

operation is seamless in that the low-voltage

control signal is sent to the screen, blinds or

other device when the AVR is turned on, and it is

turned off along with the AVR. Due to the

complexity of interfacing with power-

controlled devices, we strongly recom-

mend that the installation be done by a

qualified installer.

The AVR’s trigger jack is a 3.5mm mono plug

that delivers a 5-volt DC signal to the center pin

(“tip”) of the plug (+) with the outer shaft

(“ring”) of the plug as the negative (–) or ground

connection.

AC Power Connections

This unit is equipped with an accessory AC out-

let. It may be used to power accessory devices,

but should not be used with high-current draw

equipment such as power amplifiers. The total

power draw to the Switched Outlet

must

not exceed 100 watts.

The Switched

outlet will receive power only

when the unit is on completely. This is recom-

mended for devices that have no power switch or

a mechanical power switch that may be left in

the “ON” position.

NOTE: Many audio and video products go into a

Standby mode when they are used with switched

outlets, and cannot be fully turned on using the

outlet alone without a remote control command.

The AVR features a removable power cord that

allows wires to be run to a complex installation

so that the unit, itself, need not be installed until

it is ready for connection. When all connections

described above have been made, connect the

AC Power cord to the AC Power Cord Jack

The AVR draws significantly more current than

other household devices such as computers that

use removable power cords. For that reason, it is

important that only the cord supplied with the

unit (or a direct replacement of identical capa-

city) be used.

Once the power cord is connected, you are

almost ready to enjoy the AVR’s incredible power

and fidelity!

Speaker Selection

No matter which type or brand of speakers is

used, the same model or brand of speaker should

be used for the front-left, center and front-right

speakers. This creates a seamless front sound-

stage and eliminates the possibility of distracting

sonic disturbances that occur when a sound

moves across mismatched front-channel

speakers.

Speaker Placement

The placement of speakers in a multichannel

home-theater system can have a noticeable

impact on the quality of sound reproduced.

Depending on the type of center-channel speaker

in use and your viewing device, place the center

speaker either directly above or below your TV, or

in the center behind a perforated front-projection

screen.

Once the center-channel speaker is installed,

position the left-front and right-front speakers so

that they are as far away from one another as

the center-channel speaker is from the preferred

listening position. Ideally, the front-channel

speakers should be placed so that their tweeters

are no more than 60cm above or below the

tweeter in the center-channel speaker.

They should also be at least 0.5 meter from your

TV set unless the speakers are magnetically

shielded to avoid colourings on the TV screen.

Note that most speakers are not shielded, even

with complete surround sets only the Center

speaker may be.

Depending on the specifics of your room

acoustics and the type of speakers in use, you

may find that imaging is improved by moving the

front-left and front-right speakers slightly for-

ward of the center-channel speaker. If possible,

adjust all front loudspeakers so that they are

aimed at ear height when you are seated in the

listening position.

Using these guidelines, you’ll find that it takes

some experimentation to find the correct location

for the front speakers in your particular installa-

tion. Don’t be afraid to move things around until

the system sounds correct. Optimize your

speakers so that audio transitions across the

front of the room sound smooth.

When the AVR is used in 5.1-channel operation,

the preferred location for surround speakers is on

the side walls of the room, at or slightly behind

the listening position. In a 7.1-channel system,

both side surround and back surround speakers

are required. The center of the speaker should

face you (see below).

A 6.1 surround speaker adds an additional center

back surround speaker to the system, enabling

you to enjoy the benefits of advanced surround

modes such as Dolby Digital EX, DTS-ES and

Harman Kardon’s proprietary Logic 7/7.1 pro-

cessing.

To step up to a 6.1 system, first place the

speakers for a 5.1 system. The “sixth” speaker

should ideally be placed at the center of the

room’s rear wall, pointing directly toward the

front center channel speaker.

29851_AVR645_ENG 30/10/06 9:46 Side 21

Harman Kardon AVR645 Seite 21

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