Read JBL SP 150 Service Manual online
6
TURNING THE SUbWOOFER ON AND OFF
· If you want the subwoofer to automatically turn on when it receives
· If you want the subwoofer to automatically turn on when it receives
an audio signal and automatically turn off after not receiving an audio
signal for 10 minutes, set the Auto-On switch in the “Auto” position.
· If you want to turn the subwoofer off, set the Auto-On switch in the
“Off” position.
SUbWOOFER ADJUSTMENTS: CROSSOVER CONTROL
The Crossover control adjusts the subwoofer’s
The Crossover control adjusts the subwoofer’s
built-in crossover between 50Hz and 150Hz. The
higher you set the Crossover control, the higher in
frequency the subwoofer will operate and the more
its bass will “overlap” that of the satellite speakers.
This adjustment helps achieve a smooth transition
of bass frequencies between the subwoofer and
the satellites for a variety of different rooms and
subwoofer locations.
To set the Crossover control, listen for the
smoothness of the bass. If the bass seems too strong at certain
frequencies, try a lower Crossover control setting. If the bass seems too
weak at certain frequencies, try a higher Crossover control setting.
SUbWOOFER ADJUSTMENTS: VOLUME
Use the Volume control to set the subwoofer’s
Use the Volume control to set the subwoofer’s
volume. Turn the knob clockwise to increase
the subwoofer’s volume; turn the knob
counterclockwise to decrease the volume. Once
you have balanced the subwoofer’s volume with
that of the other speakers in your system, you
shouldn’t have to change it.
Notes on Setting Subwoofer Volume:
• Sometimes the ideal subwoofer volume setting
for music is too loud for films, while the ideal
setting for films is too quiet for music. When setting 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 tend to lessen its bass output.
SUbWOOFER ADJUSTMENTS: PHASE
The Phase switch determines whether the subwoofer driver’s
The Phase switch determines whether the subwoofer driver’s
piston-like action moves in and out in phase with the satellite
speakers. If the subwoofer were to play out of phase with the
satellite speakers, the sound waves from the satellites could
partially cancel out the waves from the subwoofer, reducing
bass performance and sonic impact. This phenomenon
depends in part on the placement of all the speakers relative
to each other in the room.
Although in most cases you should leave the Phase switch in the “Normal”
position, there is no absolutely correct setting for the Phase switch. When
the subwoofer is properly in phase with the satellite speakers, the sound
will be clearer and have maximum impact, and percussive sounds like
drums, piano and plucked strings will sound more lifelike. The best way
to set the Phase switch is to listen to music that you know well and to set
the switch in the position that gives drums and other percussive sounds
maximum impact.
sPeCiFiCaTions
Low-frequency
transducer:
10" (250mm) cone (down-firing)
Enclosure type:
Ported (front-firing)
Amplifier power:
175 watts
Frequency response:
28Hz – 170Hz
Audio controls:
Volume level, crossover frequency,
phase
Connections:
RCA line-level inputs; speaker-level
inputs and outputs
Power requirement:
100V – 240V AC, 50Hz/60Hz
Power consumption:
<1.0W (standby); 175W (maximum)
Dimensions (W x H x D): 12-1/2" x 16" x 14"
(318mm x 406mm x 356mm)
Weight:
22.9 lb (10.4kg)
oPeraTing The suBwooFer
HARMAN International Industries, Incorporated
www.jbl.com
JBL
150P / 230V Service Manual
Page 6 of 50
150 watts
35Hz - 180Hz
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