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60-Watt Stereo Equalizer/Booster
(120-1959) Features
Faxback Doc. # 46781
Your Realistic 60 Watt Stereo Equalizer/Booster adds increased dynamic
range and clean, high-volume sound reproduction to your auto-sound system.
But that is only part of what this unit can do. The 7 band equalizer lets
you tailor your system's sound to your vehicle's acoustics and your
personal taste. And, the equalizer/booster's many other features (listed
below) let you easily expand and control your auto-sound system.
7 Band Equalizer with - gives you control of the basic frequency ranges
slide Controls of music. The slide controls provide an instant
visual representation of the shape you give the
sound.
Built-In Fader - lets you easily control the balance between
front and rear speakers if you have a four
speaker system.
Two Types of inputs - let you use the equalizer/booster with a radio
or tape player that has line outputs jacks or
that only has standard speaker outputs.
CD input - lets you easily connect a portable CD player
(or any other portable unit with a headphones
jack) to the equalizer/booster.
Hi/Lo Output Power Meter - shows the output power being used by the left
and right channels of your system. You can
set the meter range for high or low, depending
on your average listening level.
Speaker Impedance Control- lets you adjust the booster for optimum
performance with 4- or 8-Ohm speakers.
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. . . we strongly urge you to have this unit installed by a
professional auto sound installer.
Choosing The Mounting Location
We suggest that you connect the wiring and confirm that the equalizer/
booster operates properly with your system before you actually mount it in
your vehicle. However, you should choose the mounting location first.
Then, when the unit is connected and working properly, you can mount it
without re-routing the wires.
Choose a mounting location below the dash that:
Is as near as possible to your vehicle's radio, tape player, or other
main auto sound component.
Does not interfere with operation of the vehicle.
Is not directly in front of a heating vent.
Allows drilling of mounting holes, without damaging other vehicle
components.
Allows enough leg room for passengers.
Allows convenient and safe routing of wires.
Then, connect the wiring as follows with the equalizer/booster as close as
possible to the chosen location.
Wiring Connections
CAUTION: If the wiring harness (for power and speakers) on your older
existing radio/tape player is not compatible with your new
RadioShack equalizer/booster's wiring harness, we suggest that
you modify the existing wiring using adapters available at your
local RadioShack store. Or, you can have a qualified technician
modify the older wiring for you. Modification of your new
RadioShack unit will void its warranty.
Connecting Power/Speakers to the Equalizer/Booster
1. Before you make any connections, disconnect the positive (+) wire from
your vehicle's battery. This reduces the possibility of damage to your
system during installation.
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Note: You must reset the clock, digital tuner memories for the radio,
and any other timer/memory devices when you reconnect the
battery wire after wiring is complete.
2. Connect the equalizer/booster's black (ground) wire to a nearby part
of the vehicle's metal frame.
Note: Many parts of modern vehicles are made of plastic or other
materials that do not conduct electricity. You must connect
the black wire to a metal part that is not insulated from the
vehicle's frame by one of these non conducting parts.
3. Connect the speaker wiring harness(es) (not included) to the speakers
in your vehicle as shown in Faxback Doc. # 46863, Fig. A.
If the speaker wires already exist, you can splice the 5 pin connector
for the supplied wiring harness(es) onto the existing speaker wires.
These connectors make installation easier and make removal of the
equalizer/booster (for service or maintenance) easier.
CAUTION: If you use existing speaker wiring or if you run new wires,
be sure that chassis ground is not used for any speaker
connection. There must be a separate insulated wire for
each speaker connection (+ and -).
4. Plug the speaker's wiring harness(es) into the equalizer/booster. Be
sure to connect front and rear speakers as marked.
5. Connect the larger red (power) wire with in-line fuse holder to the
ACC (Accessory Circuit) position of your automobile's ignition. This
connection allows the supply of +12 volt DC power source to be turned
on and off with the ignition key.
Speaker Tips
Your speakers should be capable of handling 40 watts per pair. RadioShack
auto sound speakers are normally sold and rated by pairs.
With a 4 speaker system, you can use 4- or 8-Ohm speakers. Set the 8-OHM-4
switch on the bottom of the equalizer/booster for the type of speakers you
have.
Connecting the Equalizer/Booster to Your Existing Auto Sound System (See
Faxback Doc. # 46863, Fig. B)
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If the existing auto sound component (radio or tape player) has RCA-type
line output jacks:
1. Connect the radio/tape player's line outputs to the equalizer/booster's
LINE INPUT jacks using shielded cables with RCA-type plugs. (Connect
left to left and right to right.)
2. Disconnect the square, in line connectors in the equalizer/booster's
output wiring harness.
3. Insert the equalizer/booster's output wiring plug into the matching
jack on the existing radio/type player (or into the matching jack that
you or a qualified technician added to the existing component).
If the existing auto-sound component (radio or tape player) does not have
RCA-type line output jacks:
1. Be sure that the square, in line connectors in the equalizer/booster's
output wiring harness are securely connected.
2. Insert the equalizer/booster's output wiring plug into the matching
jack on the existing radio/tape player (or into the matching jack that
you or a qualified technician added to the existing component).
Installing The Proper Fuses
If the fuse for your existing auto sound unit is not rated at 3 amps,
replace the fuse in the equalizer/booster's output wiring harness with a
fuse that matches the rating of the existing unit's fuse.
If the existing unit's fuse is rated at 4 amps or higher, replace the fuse
in the equalizer/booster's red power wire with a 15 amp fuse.
Testing The Equalizer/Booster
Before mounting the equalizer/booster in the location you chose earlier,
we suggest that you reconnect the vehicle battery's positive (+) wire and
test your entire auto-sound system. See "Operation" in Faxback Doc.
# 46783.
Mounting The Equalizer/Booster
Attach the equalizer/booster as follows in the location you chose prior to
connecting the wiring. If you used the supplied wiring harnesses, you can
unplug the wires to make mounting more convenient.
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1. Attach the left and right mounting brackets to the sides of the
equalizer/booster.
2. Using the brackets as a guide, mark the locations for the mounting
holes.
3. Drill 3/16 inch holes in the marked locations, using care not to
damage anything on the opposite side of the mounting surface.
4. Remove the mounting brackets from the equalizer and attach them to the
mounting surface using the supplied self tapping screws.
5. Attach the equalizer/booster to the brackets and plug in the wiring
harnesses.
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60-Watt Stereo Equalizer/Booster
(120-1959)
Operation
Faxback Doc. # 46783
Turning On The Equalizer/Booster
1. Turn on your radio or tape player and set its volume to a low level.
2. Press the equalizer/booster's POWER button so that the POWER indicator
lights.
3. Readjust your radio/tape player's volume control for a normal
listening level.
Adjusting The Equalizer
Adjusting an equalizer is extremely subjective - what sounds best to you
might not sound best to some one else. The following procedure covers the
basic adjustments. Exactly where to set each control is up to you.
1. Turn on your radio/tape player and the equalizer/booster.
2. Set the radio/tape player's tone (bass and treble) controls to their
center positions.
3. Adjust each of the seven slide controls for the best overall sound.
Each of the seven slide controls affects the sound around the listed
frequency - 60 Hz, 150 Hz, 400 Hz, 1 kHz, 2.4 kHz, 6 kHz, or 15 kHz.
Moving the control up increases the sound level around the listed
frequency. Moving the control down decreases the sound level around
the listed frequency.
A center control setting is neutral and has no effect on the sound.
The pattern made by the controls shows the approximate shape of the
sound output.
Using The Fader Control
The FADER control is similar to the balance control on your existing radio
or tape player. The balance control lets you adjust the balance between
the left and right speakers. The FADER control lets you adjust the balance
between the front and rear speakers.
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Turn the FADER control clockwise to emphasize the front speakers. Turn it
counter-clockwise to emphasize the rear speakers.
Using The Power Meter
The POWER METER indicates the approximate amount of power that is being
delivered from the equalizer/booster to the speakers.
When the METER LEVEL button is out (low setting), use the marked power
levels (0.1, 0.3, 1.2, 2.0) to determine the power levels.
When the METER LEVEL button is in (high setting) multiply the marked
levels by 5 (0.5, 1.5, 3.6, 10.0).
Using A Portable CD Player With The Equalizer Booster
(See Faxback Doc. # 46863, Fig. C.)
You can connect a portable CD player, or any other audio component with a
headphone jack, to the equalizer/booster and listen to it through your
auto-sound system. You need a patch cable with a 1/8 inch stereo mini
phone plug on one end and a plug that matches the portable player's
headphone jack on the other end.
1. Turn off the equalizer/booster and the portable CD player (or other
component you are using).
2. Plug one end of the patch cable into the equalizer/booster's CD jack
and the other end into the CD player (or other portable component).
3. Adjust the CD player's volume control to minimum and begin play of a
disc.
4. Adjust the CD player's volume control for the desired listening level.
Note: The radio/tape player is internally disconnected from the equalizer/
booster when you plug a patch cable into the CD jack. You must
unplug the patch cable to listen to the radio/tape player.
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60-Watt Stereo Equalizer/Booster
(120-1959) Specifications
Faxback Doc. # 46784
Maximum Output power: ............. 30 watts per channel or 60 watts total
(with four each 8 Ohm speakers connected)
Frequency Response: ............................. 15 - 30,000 Hz, at -3 dB
Separation: ........................................................ 50 dB
Input Level
High Impedance: ................................................ 550 mV
Low Impedance: ................................................... 2.7V
Total Harmonic Distortion: .............. Less than 1% (at 1 watts output)
Equalization Center Frequencies: ................ 60 Hz, 150 kHz, 400 kHz,
1 kHz, 2.4 kHz, 6 kHz, 15 kHz
Load Impedance: ......................... 4 Ohm/8 Ohm per speaker terminal
Current Drain: ............................................... 10A Maximum
Power Supply Voltage: .......................... DC, 14.4V Negative Ground
Dimensions (HWD): ................ 19 x 71 x 63 Inches (48 x 180 x 160 mm)
Weight: ................................................ 3.52 Lb. (1.6 Kg)
(BR/gw 04/07/98)
Ln-03/04
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