User's Manual

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utput Level Adjustment

utput level adjustment is a key part of the configura-

tion of any surround sound product. It is particularly

important for a digital receiver such as the AVR 645,

as correct outputs ensure that you hear soundtracks

ith the proper directionality and intensity.

In most cases, you will not need to make any

adjustments to the output level, as the settings

made by running EzSet/EQ are as accurate as those

made manually. However, you are able to use the

CHANNEL ADJUST menu to trim the settings

to suit your personal preferences or to configure the

system so that the output settings are different from

one input source to another. The ability to make indi-

vidual output level adjustments on a per-input basis is

useful for listeners who may prefer different settings

for the

subwoofer or an individual channel group (such

as the front speakers) when playing musical selections

via the CD input, as opposed to the movie sound-

tracks more frequently used with the DVD input. This

menu also allows you to adjust the output levels using

external sources such as a test disc or other program

material that you use as a standard, rather than the

system’s test tone.

IMPORTANT NOTE: Listeners are often confused

about the operation of the 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 surround channels. This is because

they are only used when a movie director or sound

mixer specifically places sound there to create ambi-

ence, a special 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 surround speakers

to operate only occasionally

. Artificially increasing the

volume to the rear speakers may destroy the illusion

of an enveloping sound field, which duplicates the

way

you hear sound in a movie theater or concert hall.

Before beginning the output level adjustment process,

make certain that all speaker connections have been

properly made.

The system volume should be set to the

level that you will use during a typical listening session.

We recommend that EzSet/EQ be used when the AVR

is first installed,

to establish the initial level settings.

To view or change the current Channel Output set-

tings, make certain that the

EZSET/EQ MAIN

menu (Figure 12) is on the screen. Press the

⁄

Navigation Buttons D

to move the cursor

next to

CHANNEL ADJUST and then press

the

OK/Enter Button E on the TC 30 or the

Set Button

on the ZR 10 remote control. The

CHANNEL ADJUST menu (Figure 30) will

appear on the screen.

igure 30

To provide the maximum flexibility, channel output level

adjustments may be made either with or without the

internal test tone, and when the tone is in use, it may

be programmed to automatically circulate among the

active channels or to only move from one channel to

the next on your command. When the

CHANNEL

ADJUST

appears, we recommend that you

first run the test tone once in the automatic mode to

verify that the speakers have been properly connected.

To do this, press the

⁄

Navigation Buttons

again until the cursor is on the TEST

TONE

line and then press the

‹

›

Navigation

Buttons

until AUTO is in highlighted

video. The test tone will then circulate among all

channels for five seconds at each position.

As the test tone circulates, the cursor will flash as it

moves to each position, to indicate where the tone

should be coming from. If the tone is heard from a

different speaker than the one indicated on the menu

screen, turn the AVR 645 off using the

Main Power

Switch

A and check the speaker wiring or connec-

tions to external power amplifiers to make certain that

each speaker is connected to the correct output ter-

minal. When you have verified that all speakers are

connected properly

, turn the AVR 645 on and return

to this menu to resume the channel adjustment proce-

dure. If any speaker connections were changed, we

also recommend that you rerun EzSet/EQ before mak-

ing any manual calibration adjustments.

After checking for speaker placement, let the test

noise circulate again, and listen to see which channels

sound louder than the others. Using the front left

speaker as a reference, press the

‹

›

Navigation

Button

on the remote

to bring all speakers

to the same volume level. The test noise circulation will

pause on the channel being adjusted to give you time

to make the adjustment. When you release the button,

the circulation will resume after five seconds.

Continue to adjust the individual channels until the

volume level sounds the same from each speaker

Adjustments should be made with the

‹

›

Navigation

Buttons

on the remote only, NOT the main

volume controls. If you are using a sound-pressure

level (SPL) meter for precise level adjustment,

set the volume so that the meter reads 75dB,

C-Weighting Slow.

hen all channels have an equal volume level, the

djustment is complete. To exit this menu, press the

⁄

Navigation Buttons D

until the cursor

is next to the

BACK TO MANUAL SETUP

line, and then press the OK/Enter Button E on the

C 30 or the

et Button

o return to the

MANUAL SETUP.

In addition to having the test tone circulate automati-

cally, you may also turn the test tone on, but advance

it from one channel to the next manually. This allows

you to make calibration adjustments, but to have more

control over the way the test tone is moved among

the channels.

To change the tone manually, first make certain that

the

CHANNEL ADJUST menu is on the

screen,

following the instructions shown above, and

then press the

⁄

Navigation Buttons D

until the cursor is on the TEST TONE line.

Next, press the

‹

›

Navigation Button o until

MAN is highlighted. This will start the test tone from

the front left speaker position but, rather than circulat-

ing to the next channel every five seconds as is the

case in the automatic mode, you must press the

⁄

Navigation Buttons D

to change the

channel the test tone is being sent to. When you have

circulated through all channels, the test tone will stop,

but you may restart it by returning to the

TEST

TONE

line and activating manual sequencing.

The final option for tone adjustment using the menu

system is to not use the internal test tone at all. Simply

use the

⁄

Navigation Buttons D

change the channel and then use the

⁄

Navigation Buttons D

to change the output

level. When making channel output adjustments with-

out the internal test tone, we strongly recommend that

you use a test disc in the

“repeat” mode on your DVD

CD player so that the signal being used is constant

throughout the adjustment process.

The output level settings may also be adjusted directly

(without going into the OSD menu system) at any time,

using the

TC 30

remote control

o adjust the speaker

settings

first press the

Devices Button 4 on the

TC 30

and then press the

Screen Button 6 at the

top of the left vertical row, to the left of the

AVR

image on the remote’s screen. When the images in

the LCD change,

press the

Screen Button 6 next

to the box with the word

TEST.

As soon as the button is pressed, the test tone will

begin to circulate, as indicated earlier. The correct

channel from which the test noise should be heard will

be shown in the lower third of the video screen and in

the

wer Display Line

While the test noise is

circulating, the proper channel position will also be

indicated in the

Speaker/Channel Input Indicators

@ by a blinking letter within the correct channel.

* CHANNEL ADJUST *

FL : 0dB SBR : 0dB

CEN : 0dB SBL : 0dB

FR : 0dB SL : 0dB

SR : 0dB SW1 : 0dB

SW2 : 0dB

TEST TONE: AUTO OFF MAN

LEVEL RESET: OFF ON

CH ADJUST: GLOBAL

EZSET SETTINGS: OFF ON

BACK TO MANUAL SETUP

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SYSTEM CONFIGURATION 39SYSTEM CONFIGURATION 39