Bedienungsanleitung Harman Kardon PT2500 (Seite 11 von 16) (Englisch)

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Installation & Configuration

If side wall mounting is not practical, the

speakers may be placed on a rear wall,

behind the listening position. Again, they

should be located so that the bottom of

the cabinet is at least 24″ higher than

the listeners’ ears. The speakers should

be no more than 6 feet behind the rear of

the seating area.

Subwoofers produce non-directional

sound, so they may be placed almost

anywhere in a room. Subwoofer place-

ment is highly influenced by room size

and shape, and the type of subwoofer

used. Follow the instructions of the sub-

woofer’s manufacturer, or experiment

with the best location for a subwoofer in

your listening room.

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 PT2500’s output

levels will enable the unit to deliver all

the performance it is capable of within

the specific environment of your listen-

ing room.

IMPORTANT NOTE: People are often

confused about the operation of the sur-

round 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 specifical-

ly places sound there to create an effect or

pull you into the action. When the output

levels have been properly set it is normal

for the rear speakers to operate only occa-

sionally. Artificially increasing the vol-

ume to the rear speakers will destroy the

illusion of an enveloping surround field

that duplicates the way you hear sound

in a movie theater or concert hall.

To calibrate your system, follow these

steps:

1. Turn on the PT2500 and the compan-

ion power amplifier.

2. Select the Dolby ProLogic mode using

the Surround Mode 6 button on the

front panel.

3. Place the front panel Balance #

control at its midpoint position, so that

the indicator is pointing straight up in

the 12 o’clock position. If the Balance

control is normally in another position

to compensate for speaker placement rel-

ative to your preferred listening position,

leave it in that spot.

4. Sit in the location that you will nor-

mally occupy when using your PT2500.

5. Press the Test Tone

button

on the remote or front panel and note

that a test noise signal will circulate

between the channels.

• While the test noise circulates among

the channels the word TESTand the

channel name will appear in the front

panel information display window. As the

names change you should first listen to

the location of the tone and verify that it

matches the name displayed in the dis-

play. If the display indicates a different

location than the speaker the test noise is

coming from you should turn off the

unit and verify that the connections to

the amplifier speakers are made to the

correct terminals on the rear panel.

6. As the test signal circulates among the

channels, use the Center Level

Up/Down

and Rear Level

Up/Down

buttons on the remote to

adjust the level so that the volume from

all channels sounds equal.

7. Press the Test Tone

button again

to turn the test signal off. Your system is

now properly calibrated and further vol-

ume adjustment should be made using

the Master Volume

buttons on

the remote or the front panel Volume

Control.

Once the system is calibrat-

ed no other adjustments are necessary.

Delay Setting

Delay time adjustment enables you to

adjust the timing between signals at the

front and surround channels.

The factory setting is appropriate for

most rooms, but in some instances the

use of an abundance of hard (reflective)

room surfaces such as windows and

wood floors, or soft (absorbent) surfaces

such as thick carpeting, acoustical tiles

and some furnishings may create an

unpleasant effect. These surfaces, in

conjunction with the size of the room,

the height of the ceiling and other

design aspects may cause the arrival of

surround channel sounds to become dis-

connected from rear channel sounds.

To adjust delay time it is necessary to

select the ProLogic, Theater or Stadium

modes using the Surround Mode

Selector buttons on the front panel or

remote

Press the Delay Adjust button

the front panel to adjust the delay time

as observed in the Information

Display  according to personal

preference or the following formula:

1. Measure the distance from the listen-

ing/viewing position to the front

speakers.

2. Measure the distance from the listen-

ing/viewing position to the surround

speakers.

PT2500 rev (G) 10/23/96

•PT2500(g).qx 10/23/96 7:36 AM Page 10

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