Radio Shack Electronic Subwoofer Crossover User manual

OWNER’S MANUAL — Please read before using this equipment.
©2000 Tandy Corporation. All Rights Reserved.
RadioShack and RadioShack.com are trademarks
used by Tandy Corporation.
Electronic Subwoofer Crossover
Your Electronic Subwoofer Crossover is de-
signed to give you excellent control over the
sound produced by your autosound system.
The crossover directs a selectable range of
lower audio frequencies to your subwoofer
speakers for increased bass response, and
blocks mid-range frequencies to enhance
sound clarity.
The crossover’s features include:
Two Types of Inputs — let you use the
crossover with an autosound system that has
either line-out jacks or standard speaker out-
puts.
Low Pass Filter Selector — lets you adjust
the frequency filter to 50 Hz, 90 Hz, or 180
Hz to match your subwoofer speaker system.
Input Level Controls — let you adjust line
or speaker input levels to match your auto-
sound system.
Bass Boost Controls — let you boost the
selected subwoofer bass output by 12 dB.
INSTALLATION
You can easily connect this crossover. How-
ever, improper connections can damage
your crossover and other components in
your autosound system, and possibly your
vehicle’s electrical system. Before you begin,
you should know:
• which wire is the power wire in your
vehicle’s electrical system
• if your autosound system has line-level
or speaker-level outputs
Before you install your crossover, carefully
read all the installation instructions in this
owner’s manual.
Notes:
• Use audio patch cables with phono-type
connectors (available at your local
RadioShack store) to complete the low
level input/output connections.
• Use your autosound system’s speaker
wires to complete the high level input
connections.
• Use 18-gauge wire (available at your
local RadioShack store) to complete the
power connections.
• Turn your autosound system’s volume
all the way down before installation.
• Set the subwoofer amplifier gain (input
level) and crossover input level controls
to their midpoints.
Choosing a Mounting Location
Choose the mounting location for the cross-
over first, but do not mount it until you have
connected the wiring, adjusted the controls,
and confirmed that the crossover operates
properly with your system. By choosing the
location first, you can later mount the cross-
over without re-routing the wires.
Choose a mounting location that:
• is as near as possible to your autosound
system connections (It is important to
keep the audio cables as short as possi-
ble to reduce noise and interference)
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• does not interfere with the operation of
the vehicle
• is not directly in front of a heating vent
• allows drilling of mounting holes without
damaging other vehicle components
• allows convenient and safe routing of
wires
Connecting Input/Output
Note: Be sure to correctly match the input and
output connections (left output to left input,
and right output to right input).
1. Disconnect the negative (–) cable from
your vehicle’s battery. This reduces the
possibility of damage to your crossover or
autosound system during installation.
Note: After you complete the connections
and reconnect the battery cable, you
must reset all clock/memory devices in
your vehicle.
2. Connect your autosound system’s L (left)
and R (right) outputs to the crossover’s L
(left) and R(right) INPUT jacks.This cross-
over has both speaker-level and line-level
inputs. Use either the LOW LEVEL or
HIGH LEVEL input terminals, but not both.
• If your autosound system has line-
level outputs, use the two LOW LEVEL
input jacks.
• If your autosound system does not
have line-level outputs, tap into the
wires for the existing speakers and use
the four HIGH LEVEL input jacks.
LOW LEVEL Input
Jacks for Line-Level
Outputs
INPUT LEVEL
SUBWOOFER BASS
BOOST Bass Settings
Mounting
Hole
Left and Right
OUTPUT Jacks
HIGH LEVEL Input Jacks
for Speaker-Level Outputs
LOW PASS
SUBWOOFER BASS
BOOST +12dB Bass
Enhancer
Power Indicator
REMOTE Terminal
GND Ground Terminal
B+12V Power Terminal
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3
3. Connect the autosound system speaker
wires to the crossover, carefully matching
polarity (L+ to L+, L– to L–, R+ to R+, and
R– to R–).
4. Connect the crossover’s L(left) and R
(right) OUTPUT jacks to the L (left) and R
(right) inputs of the amplifier that drives
the subwoofer speakers.
Connecting Power
1. Ensure the negative (–) cable is discon-
nected from your vehicle’s battery.
2. Connect the crossover’s GND (ground)
terminal to a metal part of the vehicle’s
frame.
Caution: Do not connect the ground wire
to a non-metallic (plastic) part, or to any
part insulated from the vehicle’s frame by
a non-metallic part.
3. Connect the crossover’s B+12V (power)
terminal directly to the vehicle battery’s
+12 volt terminal.
4. Connect your autosound system’s
switched power lead wire (usually
orange) to the crossover’s REMOTE ter-
minal. This turns the crossover on and off
when you turn your autosound system on
and off.
Note: If your autosound system does not
have a switched power lead wire, connect
the crossover’s REMOTE terminal to a
point in your vehicle’s fuse box that pro-
vides 12-volt battery power only when the
ignition is set to ON or ACC.
5. Reconnect the cable to your vehicle bat-
tery’s negative (–) terminal.
Testing the Connections
Follow these steps to check your autosound
system before adjusting and mounting the
crossover.
1. Turn on your autosound system and
adjust the volume to a comfortable level.
The POWER indicator lights.
2. Play a cassette tape or CD that has a
wide dynamic range, or tune to a strong
FM station.
Notes:
• If the sound from any speaker is distorted
or has static (or if there is no sound from
a speaker), turn off the power immedi-
ately, then check the wiring connections.
• If the system sounds with no distortion or
static, proceed to “Adjusting the Con-
trols.”
ADJUSTING THE CONTROLS
Setting the Low Pass Crossover
Point
The LOW PASS selector lets you set one of
three crossover points. All signals at or below
the selected frequency “cross over” to your
subwoofer speakers.
Slide the selector to 180Hz to increase the
range of low-frequency sounds. Slide the se-
lector to 90Hz or 50Hz to decrease the range of
low-frequency sounds.
Adjusting the Input Level
The input level controls let you adjust the
crossover to balance the subwoofer’s sound
level with the rest of your autosound system.
Turn your autosound system up to a normal
listening level, then use a flat-head screwdriv-
er to rotate each INPUT LEVEL control until the
subwoofer is as loud as desired.
Caution: If you use the HIGH LEVEL input ter-
minals and turn your autosound system vol-
ume too high for the crossover, you could
damage the crossover. To reduce this possi-
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12-2012 Printed in China
bility, set the INPUT LEVEL controls past their
midpoints.
Adjusting the Subwoofer Bass
Boost
The SUBWOOFER BASS BOOST controls let
you boost 45, 80, or 120 Hz subwoofer output
by 12 dB to enhance low sounds when de-
sired. Slide the 45 Hz/80 Hz/120 Hz selector to
the appropriate position, then slide +12dB to
ON. To return to the normal bass setting, set
+12dB to OFF.
Mounting the Crossover
After you have correctly connected the cross-
over and set the controls, follow these steps to
mount the crossover.
Using the crossover mounting holes as a
guide, mark the positions for the mounting
screw holes at the desired location.
At each marked position, drill a 9/64-inch (3.57
mm) hole.
Caution: Be careful not to drill into anything
behind the mounting surface.
Attach the crossover at the mounting location
using the supplied sheet metal screws, lock-
washers, and washers.
SPECIFICATIONS
Power Supply ............ 14.4 V DC Negative Ground
Current Drain ............................................... 30 mA
Total Harmonic Distortion (THD) .... 0.04% at 20 Hz
Hum and Noise ................................ 150mV typical
Line-Level (Low) Input Impedance ......... 10 kOhms
Speaker-Level (High) Input Impedance . 100 Ohms
Operating Voltage .......................... 10.5 to 16V DC
S/N Ratio ..................................90 dB (A-Weighted)
Crossover Frequency:
Subwoofer Low Pass...... 50 HZ/90 Hz/180 Hz
Crossover Slope .............................. 12 dB/Octave
Channel Separation .......................... 60 dB Typical
Output Level ......... More Than 2V RMS at 1% THD
Dimensions (HWD) .......... 1 ×39/16 ×51/8 Inches
(26 ×92 ×131 mm)
Weight ........................................................ 10.2oz
(290 g)
Specifications are typical; individual units might
vary. Specifications are subject to change and im-
provement without notice.
Limited One-Year Warranty
This product is warranted by RadioShack against manufacturing defects in material and
workmanship under normal use for one (1) year from the date of purchase from RadioShack
company-owned stores and authorized RadioShack franchisees and dealers. EXCEPT AS
PROVIDED HEREIN, RadioShack MAKES NO EXPRESS WARRANTIES AND ANY IM-
PLIED WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO THE DURATION OF THE
WRITTEN LIMITED WARRANTIES CONTAINED HEREIN. EXCEPT AS PROVIDED
HEREIN, RadioShack SHALL HAVE NO LIABILITY OR RESPONSIBILITY TO CUSTOMER
OR ANY OTHER PERSON OR ENTITY WITH RESPECT TO ANY LIABILITY, LOSS OR
DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE OR PERFORMANCE OF THE
PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WARRANTY, INCLUDING, BUT
NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVENIENCE, LOSS OF
TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT, SPECIAL, INCI-
DENTAL, OR CONSEQUENTIAL DAMAGES, EVEN IF RadioShack HAS BEEN ADVISED
OF THE POSSIBILITY OF SUCH DAMAGES.
Some states do not allow limitations on how long an implied warranty lasts or the exclusion
or limitation of incidental or consequential damages, so the above limitations or exclusions
may not apply to you.
In the event of a product defect during the warranty period, take the product and the Ra-
dioShack sales receipt as proof of purchase date to any RadioShack store. RadioShack will,
at its option, unless otherwise provided by law: (a) correct the defect by product repair with-
out charge for parts and labor; (b) replace the product with one of the same or similar design;
or (c) refundthe purchaseprice. All replaced partsand products,and productson which a re-
fund is made, become the property of RadioShack. New or reconditioned parts and products
may be used in the performance of warranty service. Repaired or replaced parts and prod-
ucts are warranted for the remainder of the original warranty period. You will be charged for
repair or replacement of the product made after the expiration of the warranty period.
This warranty does not cover: (a) damage or failure caused by or attributable to acts of God,
abuse, accident, misuse, improper or abnormal usage, failure to follow instructions, improper
installation or maintenance, alteration, lightning or other incidence of excess voltage or cur-
rent; (b) any repairs other than those provided by a RadioShack Authorized Service Facility;
(c) consumables such as fuses or batteries; (d) cosmetic damage; (e) transportation, ship-
ping or insurance costs; or (f) costs of product removal, installation, set-up service adjust-
ment or reinstallation.
This warranty gives you specific legal rights, and you may also have other rights which vary
from state to state.
RadioShack Customer Relations, 200 Taylor Street, 6th Floor, Fort Worth, TX 76102
We Service What We Sell
12/99
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