BassLink® 4sc
®
BassLink 4sc
CONNECTIONS
Note: In order for the Phantom Center circuit to
operate properly, the speakers and input wires
MUST be connected in proper polarity!
INPUT CONNECTIONS
If your source unit provides only speaker-level
output wires, connect those wires to the Universal
Interface connections as shown in Figures 3a or 3b.
Note: If your source unit provides two line-level
outputs and two speaker-level outputs, you may
connect the line-level output to the appropriate
(front or rear) RCA-type input and the speaker-
level outputs to the other (front or rear)
Universal Interface connector.
You must connect full-range signal to all four
inputs on BassLink II (if you are using the 4sc).
Do not connect a subwoofer output to any of
the inputs if you are using the 4sc.
SPEAKER CONNECTIONS
If your source unit provides line-level outputs
with RCA-type connectors, connect the signal
cables to the FRONT and REAR LINE LEVEL
inputs as shown in Figure 3c or 3d.
Connect the speakers to the FRONT and REAR
screw terminals, observing proper polarity
(Figure 3).
Connect the input signal wires according to
Figures 3a through 3d.
Figure 3.
3a.
3c.
RR
LR
Rear
Remote Level
Control
Front
Remote Level
4-Channel Speaker Outputs
(from Source Unit)
Control
4-Channel Line-Level Outputs
(from Source Unit)
3d.
3b.
BassLink II
Remote Level
Control
Source Unit
Remote Level Control
RF
Remote Level
Control
2-Channel Speaker Outputs
(from Source Unit)
LF
®
2-Channel Line-Level Outputs
(from Source Unit)
BassLink 4sc
3
CONTROLS AND FUNCTIONS
REMOTE CONTROL
BASSLINK 4sc
BASSLINK II
Figure 7.
Figure 4. REMOTE LEVEL controls.
Figure 5. BassLink 4sc controls.
Figure 6. BassLink II controls on the front panel.
SUB LEVEL: Use this control to adjust the
amount of bass to suit your preference.
PHANTOM CENTER: Use this switch to select the
proper adjustment of the Phantom Center circuit
according to your car and your preference.
POWER LED:This indicator will glow blue when
BassLink II is operational.
PHASE Control: Use this switch to reverse
the phase of BassLink II’s output with respect
to its input.
PHANTOM CENTER:
LEFT: Slide the switch to this position to provide
a phantom center for front left seating position.
OFF: Slide the switch to this position to turn off
Phantom Center processing.
FRONT/REAR GAIN: Use these to adjust the levels
GAIN Control: Use this control to adjust the
relative volume (loudness) of BassLink II with
respect to the other speakers in the vehicle.
of the front and rear speakers.
AUTOTURN ON: For speaker-level connections,
use this switch to activate (or deactivate)
BassLink II’s automatic turn-on circuit.
POWER LED:This indicator will glow blue when
BassLink II and 4sc are operational.
RIGHT: Slide the switch to this position to provide
a phantom center for front right seating position.
CROSSOVER: Use this control to adjust the
amount of high-frequency information present
in BassLink II’s output.
SERVO LED:This indicator glows blue when the
subwoofer is at maximum excursion and the
amplifier is modifying the output to maintain
maximum performance.
Note: Once you have chosen the best Phantom
Center switch position and made the necessary
adjustments to the Front Gain and Rear Gain
controls and set the Subwoofer Level control
and Phase switch, you won’t need to make any
further adjustments on the BassLink II or the 4sc.
BASS BOOST: Use this control to correct any
perceived peak or dip in the bass response
(typically around 40Hz in most vehicles). Set the
control to any value between –6dB and +3dB,
according to your preference.
For more information about using the controls,
see “Tuning BassLink II and 4sc” on page 5.
4
TUNING BASSLINK II AND 4SC
SETTINGTHE FRONT SPEAKER AND
SUBWOOFER LEVELS
5. Turn the Sub Level control (on the remote
level control) to its maximum output setting
(fully clockwise).
ABOUT THE PHANTOM CENTER CIRCUIT
Using the Phantom Center Setup CD (included
with your BassLink 4sc) you’ll listen to some
instructions, a spoken setup track and several
music selections to determine the best adjustment
for your system.The first four tracks are spoken
tracks, withTrack 3 being the most important
of those tracks. Portions of Track 3 have been
recorded through the equivalent of the Phantom
Center circuit. Listen toTrack 3, “Spoken Setup
Track”, and choose the switch position that
provides the best illusion of a person speaking
halfway between the front speakers.
Note: In order for the Phantom Center to work
properly, the front speakers MUST be connected
in correct polarity. Additionally, some factory-
installed audio systems use extensive and
non-defeatable equalization and channel delay,
which may diminish the effect of the Phantom
Center circuit.
Note: Refer to page 4, ”Controls and Functions,”
for the location of controls.
6. While listening to the same track that you
used in step 3, turn BassLink II’s Gain control
clockwise until the servo light (located on
BassLink II’s end panel) begins to flash with
each bass note but doesn’t stay lit continuously.
1. Turn on the audio system and verify (using
the Balance and Fader controls) that the
speakers and input channels are connected
properly – when the Balance control is turned
to the left, only the left speakers should
play, and when the control is turned to the
right, only the right speakers should play.
BassLink II’s subwoofer should play regardless
of the Fader or Balance control’s position.
7. While sitting in the driver’s seat, listen to
your system, making a mental note of the
amount of upper bass being reproduced.
The Phantom Center circuit provides four tuning
selections: Off, 1, 2 and 3.The three settings
process the audio signal differently and provide
optimization for several different car sizes and
front speaker mounting locations. The chart
below indicates switch positions that will
probably sound best for a variety of car sizes
and speaker locations but there is no correct
setting.You should choose the one you like best.
Track 3:
0:00-0:10 Switch in the Off position
0:11-0:21 Switch position 1
0:22-0:33 Switch position 2
0:34-0:47 Switch position 3
0:48-0:60 Rapid switching between
the three positions
8. Switch the Phase control to the 180° position
and listen again for upper bass content.
There may be more upper bass, less upper
bass or there may be no change.The position
that provides the most upper bass is correct,
but choose either setting according to your
preference.
2. Turn the Rear Gain (located on the 4sc’s end
panel) and BassLink II’s Gain control (located
on BassLink II’s front panel) all the way
down. Turn the Front Gain (located on the
4sc’s end panel) to 1/4 volume. Only the front
speakers should be playing. Additionally,
turn BassLink II’s Crossover control and Bass
Boost control to their midpoint positions and
set BassLink II’s phase control to the 0° position.
Midrange Speaker Location
car size
small
mid-size
large
doors
dash
2 or 3
2 or 3
2
kick panel
2
1 or 2
1
3
3
9. Adjust the Crossover control until you hear
only low-frequency information coming from
BassLink II’s woofer. You should use the
highest (clockwise) position possible that
doesn’t allow any vocal information to be
audible from BassLink II’s woofer (when you
listen in the driver’s position).
2 or 3
3. Play a dynamic music track with substantial
bass content –Track 5 or 9 on the Phantom
Center Setup CD is suitable – and turn the
source unit’s volume control to 3/4 volume.
Note:The Phantom Center circuit affects the
midrange speaker only in switch position 1, but
may affect the separate tweeter as well in switch
positions 2 and 3, depending on the tweeter’s
cutoff frequency. If you have separate tweeters
mounted in the tops of the doors or in the
dashboard, and the chart indicates two possible
switch positions, the second position may be
the better choice.
10. Adjust the Bass Boost control clockwise or
counterclockwise to suit your preference.
4. Turn the Front Gain control up until you
hear slight distortion in the music (fuzzy
or crackling sounds).Then reduce the Front
Gain control slightly until the distortion is
no longer present.
®
BassLink 4sc
5
TUNING BASSLINK II AND 4SC (CONTINUED)
Tracks 5 through 16 are music tracks. There
are three excerpts of songs and each excerpt
is recorded four times; once with no processing
(switch in the Off position), once through switch
position 1, once through switch position 2 and
once through switch position 3. Using the music
tracks, choose the switch position that distributes
the sound best between the right and left speakers.
You can use the following list of tracks as a guide.
PHANTOM CENTER SETUP CD
SETTINGTHE PHANTOM CENTER CIRCUIT
1. Before you begin, set the Phantom switch on
the remote control for the seat in which you
are sitting. Set the Phantom Center switch on
the 4sc in the Off position.Turn the Rear Gain
control on the 4sc all the way down (counter-
clockwise) and make sure no sound is coming
from the rear speakers.
ADDING THE SOUND FROM THE REAR
SPEAKERS
With music playing, turn the Rear Gain control
clockwise until sound from the rear speakers is
clearly audible but not so loud that it makes the
music seem to come from the back of the car.
Track 1
Track 2
Track 3
Track 4
Track 5
Track 6
Track 7
Track 8
Track 9
Introduction
Instructions forTrack 3
Spoken SetupTrack
Instructions for MusicTracks
Lonely Savior (no processing)
Lonely Savior (switch position 1)
Lonely Savior (switch position 2)
Lonely Savior (switch position 3)
AnotherTime, Another Place
(no processing)
2. Insert the Phantom Center Setup CD into your
CD player.
3. Follow the spoken instructions on the setup CD.
4. Once you have chosen the switch position you
like best usingTracks 1–17, stop the CD and
move the Phantom Center switch on the 4sc
to the position you have chosen. You can use
Track 17 and the music selections that follow
(Tracks 18–20) to check your work.
Track 10 AnotherTime, Another Place
(switch position 1)
Track 11 AnotherTime, Another Place
(switch position 2)
Track 12 AnotherTime, Another Place
(switch position 3)
Track 13 Cinderella’s Revelation
(no processing)
Track 14 Cinderella’s Revelation
(switch position 1)
Track 15 Cinderella’s Revelation
(switch position 2)
Track 16 Cinderella’s Revelation
(switch position 3)
Track 17 Conclusion
Track 18 Lonely Savior: Ken Birmingham
Track 19 AnotherTime, Another Place:
Mike Christian
Track 20 Cinderella’s Revelation: Joe Chinnici
6
TROUBLESHOOTING
SPECIFICATIONS
BassLink 4sc
•
PROBLEM:
BassLink II and 4sc Power LEDs are not lit.
•
PROBLEM:
•
PROBLEM:
BassLink 4sc Power LED lit but no sound from
one or all speakers.
No output from BassLink II when head-unit
fader control is set to front or rear (in a
4-channel connection).
Amplifier Power:
35W x 4 channels at 4 ohms
50W x 4 channels at 2 ohms
Frequency Response: 90Hz to 47kHz
Fuse: 30A
Max. Current Draw: 26A
CAUSES and SOLUTIONS:
1. Poor or improper power connection. Check
power, ground and remote connections.
Check speaker level input for proper
connections (see No Output).
CAUSES and SOLUTIONS:
1. Improper input signal connections. Check
all input connections on BassLink II and
source unit.
CAUSE and SOLUTION:
Input connections are improperly wired.
Verify all connections (see Connections,
on page 3).
Idle Current Draw:
Input Sensitivity:
<800mA
100mV to 6V line-level input
1V to 16V universal interface
2. Blown or improperly installed fuse.
Check main battery fuse and replace
if necessary.
2. Damaged speaker wire or improper speaker
connections. Check speakers and wiring;
change if necessary.
3. Improper signal connections between
BassLink 4sc and BassLink II. Check gray
ribbon signal cable connection to 4sc
(see Installation, Figure 2).
Crossover Frequency: Fixed 80Hz high-pass
Check fuse on BassLink II and 4sc.
Crossover Slope:
12dB per octave
•
PROBLEM:
BassLink II turns on before head unit is
completely on and produces a “thump”
sound.
•
PROBLEM:
4sc Power LED not lit but BassLink II
Power LED is.
CAUSE and SOLUTION:
•
PROBLEM:
Music sounds distorted.
For speaker-level connections, head unit is
producing a false turn-on signal. On BassLink II’s
side panel, slide AUTO TURN ON to OFF. It will
be necessary to connect the Remote lead
to a switched ignition voltage source.
CAUSES and SOLUTIONS:
1. Improper power connection between
BassLink 4sc and BassLink II. Check Power
Connector (see Installation, Figure 2).
2. Improper signal connection between
BassLink 4sc and BassLink II. Check gray
ribbon signal cable connection to the 4sc
(see Installation, Figure 2).
CAUSES and SOLUTIONS:
1. Gain levels are set too high or head unit
volume is too high. Reduce volume and/or
Gain Levels.
2.Tone Controls on head unit misadjusted.
Check controls and adjust as necessary.
•
PROBLEM:
BassLink II’s BassLink 4sc POWER LED
remains on after head unit is turned off.
3. Blown or improperly installed BassLink 4sc
fuse. Check fuse and replace if necessary.
•
PROBLEM:
No output from BassLink 4sc and BassLink II.
CAUSE and SOLUTION:
For speaker-level connections, this is normal
operation when AUTO TURN ON is set to ON.
BassLink II and BassLink 4sc will remain on for
another 5 to 10 minutes after sensing that audio
signals are not present before shutting down.
CAUSES and SOLUTIONS:
Input connections are improperly wired. Verify
all connections (see Figures 4 and 5).
®
BassLink 4sc
7
Declaration of Conformity
We, Harman Consumer Group International
2, route de Tours
72500 Chateau du Loir
France
A valid serial number is required for warranty coverage.
This product is designed for mobile applications and is not intended for connection to the mains.
Features, specifications and appearance are subject to change without notice.
declare in own responsibility that the product described in this owner’s
manual is in compliance with technical standards:
Infinity, Harman International and BassLink are trademarks of Harman International Industries, Incorporated, registered in the United States and/or other countries.
EN 55013:2001+A1:2003
EN 55020:2002+A1:2003
Infinity Systems, 250 Crossways Park Drive, Woodbury, NY 11797 USA
© 2005 Harman International Industries, Incorporated. All rights reserved. • Part No. BASSLINK4SCOM10/05
Klaus Lebherz
Harman Consumer Group International
Chateau du Loir, France 10/05
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