SUB 560P - JBL Audio Service Manual (repair manual). Page 6

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TUrning The sUbWooFer on And oFF
Set the subwoofer’s Power switch to the “On” position. The subwoofer 

will automatically turn itself on when it receives an audio signal, and it 

will go into Standby mode after it has received no audio signal for 20 

minutes. The subwoofer’s On/Standby LED will glow green when the 

subwoofer is on and will glow red when the subwoofer is in Standby.

If you will not be using the subwoofer for an extended period – for 

instance, if you’re going on vacation – set the Power switch to the “Off” 

position.

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 Level 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 piston-like action moves in and out in phase with 

the system’s other speakers. If the subwoofer were to play 

out of phase with the other 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 “0” 

position, there is no absolutely correct setting for the Phase switch. 

When the subwoofer is properly in phase with the rest of the system’s 

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.

Low-frequency 

transducer:

12" (300mm) PolyPlas™ cone,  

cast basket

Enclosure type:

Sealed (forward-firing)

Amplifier power:

400W RMS; 600W peak

Frequency response:

22Hz – 150Hz

Audio controls:

Volume level, crossover frequency, phase

Connections:

RCA line-level and LFE inputs

Power requirement:

120V, 60Hz (US); 220V – 230V, 50Hz/60Hz 

(EU)

Power consumption:

<0.55W (120V & 230V) standby;  

700W – 7.2A (120V),  

700W – 3.6A (230V) maximum

Dimensions (W x H x D): 15-21/32" x 19-17/32" x 15-15/16"  

(398mm x 496mm x 405mm)

Weight:

63 lb (29kg)

HARMAN International Industries, Incorporated 

and/or other countries. PolyPlas is a trademark of HARMAN International Industries, Incorporated.
Features, specifications and appearance are subject to change without notice.
Part #: JBLP4685 Rev: A

JBL

SUB 560P Service Manual

Page 6 of 18