JBL Balboa SUB/230 Owner's Manual - Troubleshooting

English

TROUBLESHOOTING

If you used the high-level

(speaker) inputs and there 

is no sound from any of the

speakers:

• Check that the receiver/

amplifier is on and a source 

is playing.

• Check that the powered 

subwoofer is plugged into 

an active electrical outlet 

and is switched on.

• Check all wires and connec-

tions between the receiver/

amplifier and the speakers.

Make sure all wires are con-

nected. Make sure none of the

speaker wires are frayed, cut

or punctured, or touching

each other.

• Review proper operation 

of your receiver/amplifier.

If there is low (or no) bass

output:

• Make sure the connections

to the left and right “Speaker

Inputs” have the correct 

polarity (+ and –).

• Make sure that the sub-

woofer is plugged into an

active electrical outlet and

switched on.

• Adjust the crossover point.

• Flip the Phase Control switch

to the opposite position.

• If you are using a Dolby

Digital/DTS receiver or 

processor, make sure that the

subwoofer adjustments on 

the receiver/processor are 

set up correctly.

• Slowly turn the Level Control

clockwise until you begin to

hear the desired amount of

bass.

If you used the line-level

inputs and there is no sound

from the subwoofer:

• Check that the receiver/

amplifier is on and a source is

playing.

• Check that the powered 

subwoofer is plugged into an

active electrical outlet and is

switched on.

• Check all wires and 

connections between the

receiver/amplifier and the

subwoofer. Make sure all

wires are connected. Make

sure none of the wires are

frayed, cut or punctured, or

touching each other.

• Review proper operation of

your receiver/amplifier.

• Slowly turn the Level 

Control clockwise until you

begin to hear the desired

amount of bass.

• Make sure that you have

configured your receiver/

processor so that the sub-

woofer/LFE output is on.

PHASE CONTROL

The Phase Control 

∫ deter-

mines whether the sub-

woofer’s piston-like action

moves in and out in phase

with the main speakers or

opposite the main speakers.

There is no correct or incor-

rect setting. Proper phase

adjustment depends on sev-

eral variables such as sub-

woofer placement and lis-

tener position. Adjust the

phase switch to maximize

bass output at the listening

position.

Remember, every system,

room and listener is different.

There are no right or wrong

settings; this switch offers the

added flexibility to adjust your

subwoofer for optimum per-

formance for your specific 

listening conditions without

having to move your speak-

ers. If at some time in the

future you happen to

rearrange your listening room

and move your speakers, you

should experiment with the

phase switch in both posi-

tions, and leave it in the

position that maximizes bass

performance.

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