OPTION 2 – CONNECTION WITH AUDIO CABLE
If your preamp receiver or processor has a subwoofer or mono output jack that is
controlled by the master volume control, use a single audio cable to connect that
output to the subwoofer’s Line-In jack. No audio cables from the subwoofer’s Line-
Out jacks are needed in this set-up.
SUBWOOFER ADJUSTMENT & USE
Subwoofer initial control settings
•
Set the LOW PASS FREQUENCY Control to its center position.
•
Set the LEVEL Control fully counterclockwise to MIN. You’ll reset
this control after you make other adjustments.
Adjusting the Subwoofer controls
•
Play a program on your system. For the following adjustments, use
the Dolby ProLogic Normal surround mode and select a movie that
has a Dolby Surround soundtrack with a lot of music, or play a music
CD. Adjust the Receiver’s volume control for a comfortable sound
level from the system speakers.
•
Increase the Subwoofer’s LEVEL Control setting clockwise, so that
you hear the deep bass. Adjust the control for a natural, musical
balance that has plenty of deep bass sound when it is actually
present in the music.
•
Listen carefully to bass voices and, if needed, adjust the LOW PASS
FREQUENCY Control so that they sound natural. Setting the
frequency too high will make deep voices sound excessively
“chesty” or resonant and will give the upper bass in music a “one-
note” quality. Setting the frequency too low will make deep voices
sound “thin” and will give music a lack of “warmth”.
•
Make fine adjustments until the program has satisfying and natural
sound quality on both bass voices and music.
Setting the Phase Switch
The PHASE switch controls the phase of the Subwoofers output rela
tive to that of the Front speakers. In many installations, it will be dif
ficult to tell which switch setting is the correct one. Listen carefully
to the sound quality while someone else toggles the switch between
its two positions. The position that produces the fullest deep bass
and the warmest bass and mid-bass sound is the correct one. You
may need to readjust the SUBWOOFER OUT LEVEL and SUBWOOFER
CROSSOVER FREQUENCY controls after setting this switch
TROUBLESHOOTING
Subwoofer POWER Indicator LED does not light
•
Check that the Subwoofer’s POWER Switch is in the AUTO ON position.
•
If the POWER Switch is in the AUTO ON position, check the AC out
let the Subwoofer is plugged into to be sure that it is live. You can
use a tester or plug-in a lamp to check it.
•
If the AC outlet is live, either the power cord or Subwoofer has a
problem. Unplug the power cord from the AC outlet and check the
fuse by unscrewing the center piece from the holder. If it is blown,
replace the fuse only with a fuse of the same type and rating. If this
doesn’t help, take the Subwoofer to your dealer for service – THERE
ARE NO USER SERVICEABLE PARTS INSIDE.
No sound from the Front speakers.
•
Be sure the Receiver and Subwoofer POWER Switches are in the On
positions.
•
Check the Receiver’s Volume Control Setting - if it is all the way
down, there won’t be any sound.
•
Check that the Receiver’s Input Selector is set to an active source of
audio signals and that a Tape Monitor Loop is not engaged.
•
Be sure that the Receiver’s Speaker Selector switch is turned on to
the terminals [A or B, 1or 2] that you have your Front speakers
connected to. If the Receiver has a headphone jack, you can use
headphones to check the Receiver for output.
•
Check the wires and connections from the Receiver’s Front Speaker
Output terminals to the Subwoofer’s SPEAKER-IN terminals.
•
Try removing the Subwoofer from the system, leaving your Front
speakers connected to the Receiver. If there still is no sound, take
the Receiver to your dealer for service.
No sound from the Subwoofer
•
First, be sure there is sound from the Front speakers and that the
Receiver is working correctly as outlined above.
•
Check the Subwoofer’s LEVEL Control. If it is all the way counter
clockwise, there may be no sound.
•
The Subwoofer only reproduces deep bass sound. If the program
has no deep bass, the Subwoofer will not make any sound. Play a
program with plenty of bass, such as jazz or rock music, or an action
movie.
•
If everything else checks OK, take the Subwoofer to your dealer for
service - THERE ARE NO USER SERVICEABLE PARTS INSIDE.
SPECIFICATIONS
Driver Complement and Enclosure
12” long throw woofer in a down-firing slot-loaded configuration
with a 12" front firing Passive Radiator
Frequency Response
20Hz-150Hz
Amplification
Power output: 250 Watts RMS, LFE In/Out
Total Harmonic Distortion
10% @ 250 Watts output
Signal-to-Noise Ratio
>87 dB
Crossover frequency (-3 dB)
50 Hz @ MIN 150 Hz @ MAX
Special Features:
2 pairs 5 -way gold binding posts for high level output
2 pairs 5 -way gold binding posts for high level input
2 RCA low level inputs
2 RCA low level outputs
1 RCA LFE input
1 RCA LFE output
Finish: Black ash laminate
Dimensions (HxWxD): 16.75" x 14" x 18.75", (42.5cm x 35.6cm x 47.6cm)
Weight: 35.5 lbs (16.1 kgs)
LIMITED WARRANTY
This warranty remains in effect for five years from date of purchase for
speaker components, one year on subwoofer amplifiers and electronic com-
ponents.
This warranty protects the original owner providing that the product has
been purchased from an authorized Acoustic Research dealer in the United
States. The original bill of sale must be presented whenever warranty serv-
ice is required. For warranty service outside the United States, contact the
authorized Acoustic Research distributor in the country where the product
was purchased.
Except as specified below, this warranty covers all defects in material and
workmanship. The following are not covered: Damage caused by accident,
misuse, abuse, product modification or neglect, damage occurring during
shipment, damage from failure to follow instructions contained in the own-
ers manual, damage resulting from the performance of repairs by someone
not authorized by Acoustic Research, or any claims based on misrepresen-
tations by the seller. This warranty does not cover incidental or consequen-
tial damages. It does not cover the cost of removing or reinstalling the unit.
PRE-AMPLIFIER
SUBWOOFER
POWER AMPLIFIER
LEFT SPEAKER
RIGHT SPEAKER