Bose Acoustimass 700 Instruction Manual download pdf (Page 25)

KR-897/KR-797 (En)





How to calculate the

proper delay time

Assuming that the distance from

the front speakers is A meters and

that from the surround speakers is

B meters:

Adjust the volume level of each speaker.

1 Ensure that “TEST L” is displayed. Test

tone will be output from each speaker.

2 Adjust the volume levels of the center

speaker and surround speakers with ref-

erence to the front speaker (left & right)

levels.

(1) While test tone is output from the

speaker(s) to be adjusted,

(2) Adjust the speaker level.

3 After having adjusted all of the speaker

levels, establish the setup.

After this, the unit enters the condition

for “5 Adjust the delay time”.

Front

speakers

Surround

speakers

What is delay time?

The sound entering the ears include the direct sound coming from the sound source and the indirect sounds reflected from the walls, floor,

ceiling, etc. The indirect sounds are delayed because they travel longer distance required for reflection before they reach the ears. The delay

time is the difference in time between the direct sound and indirect sounds.

Adjust the delay time.

1 Ensure that the delay time adjustment

display is displayed.

2 Adjust the delay time.

3 Establish the setup.

This is the end of setup (the unit returns

to the condition before starting the setup

operations).

SETUP

÷ Check the proper delay time for your listening room by referring to

“How to calculate the proper delay time”.

÷ Select an integer value which is closest to the value obtained with

“How to calculate the proper delay time”.

÷ The delay time can be adjusted to 15, 20, 25 or 30 ms.

Delay time

Surround speaker

side

Adjustment

position

Front speaker

side

LEVEL

CONTROL

SETUP

LEVEL

CONTROL

To increase

To decrease

÷Noise-like test tone moves across speakers at intervals of 1.5 seconds.

TEST L (Front speaker, left)

TEST C (Center speaker)

(Only when NORMAL or WIDE BAND is selected in step 2)

TEST R (Front speaker, right)

TEST S (Surround speakers)

(Only when PRO LOGIC is selected in step 1)

÷ Be sure to adjust from the listening position.

÷ Each press of a LEVEL CONTROL key varies the level by 1 dB.

÷ The volume level can be adjusted in the range from -10 to +10 dB.

÷ The front speaker (left & right) levels cannot be varied with the LEVEL

CONTROL keys.

÷ Adjust the volume level from each of the center speaker and surround

speakers while test tone it output from the corresponding speaker.

Display when test tone is output from surround speakers

SURROUND

TEST 5

SURROUND

-X-- 20

1 Use the delay time calculation

chart on the right.

Example:

When A = 3 m,B = 3 m,

the delay time is 20 ms.

2 Use the following

formula for calculation.

Delay time =

20 + 3 x (A - B) (Unit: ms)

A (m) B (m)

To increase

To decrease

 07.6.11, 5:06 PM25

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 31 32

Comments to this Manuals

No comments

Bose Acoustimass 700 Instruction Manual Page 25

Comments to this Manuals