SUB 150P - JBL Audio Service Manual (repair manual). Page 4

Read JBL SUB 150P Service Manual online

3
www.jbl.com
ENGLISH
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 
speakers (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 
subwoofer 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
to a ReceiveR oR PReamP/PRocessoR with PReamP outPuts
Receiver/Processor
Receiver/Processor
Set Input Mode 
Switch to “LFE”
Set Input Mode 
Switch to “Normal”
0242CSK - JBL SUB150P OM_v3.indd   3
29/09/10   9:57:50
JBL
SUB 150P/230 Service Manual
Page 4 of 48
Page of 48
Display

Click on the first or last page to see other SUB 150P service manuals if exist.