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This Class B digital apparatus complies with Canadian ICES-003.

Cet appareil numérique de la classe B est conforme à la norme 

NMB-003 du Canada.

This Class B digital apparatus complies with Canadian ICES-003.

Cet appareil numérique de la classe B est conforme à la norme 

NMB-003 du Canada.

PlacIng the suBwooFer

connectIng the suBwooFer

The performance of a subwoofer is directly related to its placement in the listening room 

and its physical position relative to the other speakers in the system. 

While it is true that in general our ears do not hear directional sounds at the low 

frequencies where subwoofers operate, when installing a subwoofer within the limited 

confines of a room, the reflections, standing waves and absorptions generated within 

the room will strongly influence the performance of any subwoofer system. As a result, 

the specific location of the subwoofer in the room does become important to the 

amount and quality of bass that is produced.

For example, placing the subwoofer next to a wall generally will increase the amount of 

bass in the room; placing it in a corner (

1

) generally will maximize amount of bass in the 

room. However, corner placement can also increase the destructive effect of standing 

waves on bass performance. This effect can vary depending on the listening position 

– some listening positions may yield very good results while others may have far too 

much (or too little) bass at certain frequencies.

In many rooms, placing the subwoofer along the same plane as the left and right speak-

ers (

2

) can produce the best integration between the sound of the subwoofer and that 

of the left and right speakers. In some rooms, the best performance could even result 

from placing the subwoofer behind the listening position (

3

). 

We strongly recommend that you experiment with placement before choosing a final 

location for your subwoofer. One way you can determine the best location for the sub-

woofer is by temporarily placing it in the listening position and playing music with strong 

bass content. Move around to various locations in the room while the system is playing 

(putting your ears where the subwoofer would be placed), and listen until you find the 

location where the bass performance is best. Place the subwoofer in that location.

Front Left 

Speaker

TV

Center 

Speaker

Front Right 

Speaker

Surround Left 

Speaker

Surround Right 

Speaker

1.

2.

3.

TO A RECEIvER OR PREAMP/PROCESSOR wITh A LOw-PASS FILTERED DEDICATED SubwOOFER OuTPuT

Receiver or 

Amplifier

Receiver or 

Amplifier

SUB140P

Subwoofer

SUB140P

Subwoofer

Mono RCA Cable 

(included)

Mono RCA Cable 

(included)

Mono RCA Cable 

(not included)

Содержание SUB140P

Страница 1: ... and automatic turn on off the SUB140P is also simple to connect and set up We re confident that this JBL subwoofer will provide every note of enjoyment that you expect and that when you think about pur chasing additional audio equipment for your home car or office you will once again choose JBL products This quick start guide contains all the information you need to set up connect and adjust your...

Страница 2: ...or long periods of time 14 Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as when the power supply cord or plug has become damaged when liquid has been spilled or objects have fallen into the apparatus when the appa ratus has been exposed to rain or moisture when the apparatus does not operate normally or the apparatus h...

Страница 3: ...gnal and will enter the Standby mode when it has gone without receiving an audio signal for 20 minutes When this switch is set in the On position the subwoofer will remain on whether or not it is receiving an audio signal Subwoofer Level Control Use this control to adjust the subwoofer s volume Turn the knob clockwise to increase the volume turn the knob counterclockwise to decrease the volume Lin...

Страница 4: ...fect of standing waves on bass performance This effect can vary depending on the listening position some listening positions may yield very good results while others may have far too much or too little bass at certain frequencies In many rooms placing the subwoofer along the same plane as the left and right speak ers 2 can produce the best integration between the sound of the subwoofer and that of...

Страница 5: ...too quiet for music When set ting the subwoofer volume listen to both music and films with strong bass content and find a middle ground volume level that works for both I f your subwoofer always seems too loud or too quiet you may want to place it in a different location Placing the subwoofer in a corner will tend to increase its bass output while placing it away from any walls or corners will ten...

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