Bedienungsanleitung Harman Kardon AVR40 (Seite 16 von 24) (Englisch)

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Installation and Configuration

Consult the subwoofer instructions or

consult your dealer for additional

information.

When using a single subwoofer and a

separate mono power amplifier, the

AVR40 subwoofer outputs must be com-

bined using an optional “Y” adapter. If

there is no crossover in the subwoofer an

optional, external low pass filter or

crossover system must be used.

External Amplifier Connections

The flexibility of the AVR40 permits you

to use external power amplifiers in place

of the unit’s built in circuits. If a five

channel amplifier is used, simply remove

the jumper pins connecting the front

left/right outputs b and the main

amplifier inputs c. Connect the preamp

outputs for all channels bdeto the

appropriate input connections of your

power amplifier. Remove the speaker wire

connections from the receiver and con-

nect them to the external amplifier. All

other operation of the receiver remains

normal.

NOTE: Although there are two outputs

for the center channel, both are identi-

cal. In most installations only one center

channel connection is necessary.

It is also possible to use a higher power

external amplifier for the front channels

and use the AVR40’s internal amplifier to

power the surround channels. For this

installation remove the jumper pin con-

necting the front left right outputs b

and the main amp inputs c. Flip the

pins so that the rear outputs d are

connected to the main inputs.

Connect the front channel outputs to the

appropriate inputs of the external ampli-

fier, and move the front channel speaker

wire connections from the AVR40 to the

power amplifier.

Finally, connect the rear channel speaker

wires to the front left and right speaker

outputs on the AVR40 ¤‹, as shown

on the accompanying diagram.

the performance it is capable of within

the specific environment of your

listening room.

IMPORTANT NOTE: Many listeners

are often confused about the operation of

the rear (surround) channels. While

some assume that sound should always

be coming from each speaker, most of the

time there will be little or no sound in the

rear channels. This is because they are

only used when a movie director or

sound mixer specifically places sound

there to create ambiance, an effect or to

continue action from the front of the

room to the rear. When the output levels

are properly set it is normal for them to

operate only occasionally. Artificially

increasing the volume to the rear

speakers may destroy the illusion of

an enveloping sound field that dupli-

cates the way you hear sound in a movie

theater or concert hall.

It is also important to note that the Dolby

Pro Logic surround processing used in

the AVR40 rear channel is a single

monaural feed, even though there are

two speakers. The position of the speakers

and the relationship of the level of sound

in the rear channel and the front left or

right channels creates the effect of direc-

tional sounds for the rear channels.

Thus, when adjusting the rear channel

there is only one, as opposed to two

adjustments.

To begin the adjustment process, first set

the system volume to the level that you

will use during a typical listening ses-

sion. Next, press the Calibrate button

on the front panel or remote. Note

that the front panel display will change

to read LF although there will be no

change to the system output.

AVR40 rev (j) 4/16/97

LEFT

RIGHT

Right Surround

Speaker

Left Surround

Speaker

RIGHT

MAIN IN

FRONT

LEFT

PRE OUT

CENTER

PRE OUT

CENTER

SPEAKER

Ω

FRONT

SPEAKERS

Ω

SUB

WOOFER

OUT

REAR

PRE OUT

External

Power Amplifier

–

NOTE: When using an external amplifier

for the front channels it is highly recom-

mended that the same power be used for

the left, center and right channels.

Output Level Calibration

For proper operation in the surround

modes it is important that the level from

all channels be as close to one another as

possible. A small amount of time spent to

properly calibrate the AVR40’s output

levels will enable the unit to deliver all

•AVR40 om (j).qx 9/15/98 3:47 PM Page 13

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