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Use this installation method 
for Dolby Pro Logic applica-
tions (not Dolby Digital, DTS or
other digital processing),
where the receiver/processor
does not have a subwoofer
output, or a volume-controlled
preamp (line-) level output:

Connect your receiver or
amplifier’s front left and right
speaker terminals to the left
and right terminals on the 
subwoofer that are marked
“Speaker Level In.” Connect
the left and right terminals 
on the subwoofer that are
marked “Speaker Level Out”
to the corresponding terminals
on the back of your front left
and right speakers.  

Connect your receiver or
amplifier’s center, surround
and surround back speaker
terminals to the corresponding
terminals on the back of 
your center and surround
speakers.

Move the Master Power
switch (marked “Power” 

å) to

the “1” (On) position to use the
Balboa Subwoofer. 

If you will be away from home
for an extended period of time,
or if the subwoofer will not be
used, switch the Master Power

switch 

å to the Off position.

The subwoofer Level Control
∂ adjusts the volume of the
subwoofer relative to the rest
of the system. Proper level

adjustment depends on several
variables such as room size,
subwoofer placement, type of
main speakers and position.

Adjust the subwoofer level so
that the volume of the bass
information is pleasing to you.

The Crossover Frequency
Control 

ç determines the

highest frequency at which
the subwoofer reproduces
sounds. If your main speakers
can comfortably reproduce
some low-frequency sounds,
set this control to a lower fre-
quency setting, between 50Hz
and 100Hz. This will concen-
trate the subwoofer’s efforts
on the ultradeep bass sounds
required by today’s films and
music. If you are using smaller
bookshelf speakers that do
not extend to the lower bass
frequencies, set the low-pass
crossover control to a higher
setting, between 120Hz and
150Hz. This control is not used
when the LFE switch is in the
“LFE” position.

• 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.

• 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.

• 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.

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.

© 2005 Harman International Industries, Incorporated 

JBL is a registered trademark of Harman International Industries, Incorporated.

Part No.406-000-05178

JBL Consumer Products, 250 Crossways Park Drive, Woodbury, NY 11797 

www.jbl.com   

*Trademarks of Dolby Laboratories.

DTS is a registered trademark of Digital Theater Systems, Inc.

All features and specifications are subject to change without notice.

100 Watts

225 Watts

200mm (8") Pure-cellulose-fiber cone

Line-level, LFE and  
speaker-level with
5-way binding posts

Variable from 50Hz to 150Hz

35Hz – Low-pass 
crossover setting (–6dB)

413mm x 279mm x 349mm

13.6kg

†

The Peak Dynamic Power is measured by record-
ing the highest center-to-peak voltage measured
across the output of a resistive load equal to mini-
mum impedance of the transducer, using a 50Hz
sine wave burst, 3 cycles on, 17 cycles off.

Declaration of Conformity

We, Harman Consumer Group International

2, route de Tours 
72500 Chateau-du-Loir
France

declare in own responsibility that the product described
in this owner’s manual is in compliance with technical
standards: 

EN 55013:2001+A1:2003 
EN 55020:2002+A1:2003 
EN 61000-3-2:2000 
EN 61000-3-3:1995+A1:2001
EN 60065:2002

Gary Mardell

Harman Consumer Group International

Chateau-du-Loir, France  1/05