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XL-110 High Power
Stereo Amplifier
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ˆ Features
Your RadioShack High-Power Stereo Amplifi-
er produces a total of 110 watts to give add-
ed punch and power to your vehicle’s
existing auto sound system.
Hz. This lets you set up the amplifier so you
can connect a subwoofer.
Short Circuit Protection
— distorts the am-
plifier’s sound if any output channel shorts,
alerting you to turn off the auto sound sys-
tem.
The amplifier produces up to 55 watts per
channel of clean, powerful sound at all audio
frequencies with minimum distortion. You
can connect your auto sound system’s low-
level or speaker-level outputs to this amplifi-
er.
Auto-Off
— protects the amplifier by tempo-
rarily shutting down if it gets too hot, an out-
put channel shorts, or it detects an input
overload. The amplifier restarts automatically
when it cools or the problem is corrected.
Its features include:
14K Gold-Plated Noise-Isolated Low-Lev-
Protection Indicator
— lights if the amplifier
el Input Jacks
— let you connect low-level
shuts itself down.
(preamplifier) signal inputs to match your
auto sound system’s output for the best
high-fidelity performance.
THE FCC WANTS YOU TO
KNOW
14K Gold-Plated Speaker Terminals
— de-
Your amplifier might cause TV or radio inter-
ference even when it is operating properly.
To determine whether your amplifier is caus-
ing the interference, turn off your amplifier. If
the interference goes away, your amplifier is
causing it. Try to eliminate the interference
by:
signed for low impedance, high conductivity,
and minimum corrosion, to provide the high-
est signal transfer and lowest sound distor-
tion.
Input Level Control
— lets you adjust the
level of the audio signals that enter the am-
plifier.
• Moving your amplifier away from the
receiver
Automatic Power Switching
— can auto-
matically turn the amplifier on or off when
you turn your auto sound system on or off
(depending on how you hook up the amplifi-
er).
• Contacting your local RadioShack store
for help
Mute Turn On Circuit —
eliminates the
thump you hear when you turn on some am-
plifiers.
Power Indicator
— lights when power is
supplied to the amplifier.
Crossover Frequency Circuit
— lets you
adjust the crossover frequency from 45−400
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Features
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ˆ Preparation
SUPPLIED HARDWARE
Your amplifier comes with the following items. Be sure you locate everything listed before you
store or dispose of the packing materials.
Power Wire (Red) (1)
Ground Wire (Black) (1)
Remote Wire (Blue/White) (1)
Flat Washers (4)
4-Pin Connector with Wire (1)
Sheet Metal Screws (4)
Twist-On
Terminal
Connectors (5)
Lock Washers (4)
Also, be aware that installation in your vehi-
cle might require cutting or modifying your
vehicle.
BEFORE YOU BEGIN THE
INSTALLATION
Before you install your amplifier, read all the
instructions in this owner’s manual. You
should be able to answer all of these ques-
tions about your vehicle’s electrical and auto
sound systems.
Choosing a Mounting Location
A good location for mounting the amplifier is
in your vehicle’s trunk. Wherever you decide
to mount it, choose a mounting location that:
• Does my vehicle have an auto sound
system, such as a car stereo or CD
player, already installed? (You must
have an existing auto sound system to
use this amplifier.)
• does not interfere with the vehicle’s
operation
• lets you drill mounting holes without
damaging other vehicle components
• How do I connect a wire to the fuse box?
• allows enough space around the cooling
fins for proper airflow and cooling
• Which of the auto sound system’s wires
is the power wire?
• lets you easily see the amplifier’s
POWER and PROTECTION indicators
• Which of the auto sound system’s termi-
nals are low-level outputs and which are
high-level (speaker) outputs?
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Preparation
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Warning:
The amplifier gets very hot while it
Then test the connections. When you con-
firm that everything works as expected, dis-
connect the amplifier, mount it in your
vehicle, and reconnect it.
is on. Do not touch the amplifier or place
flammable objects near it while it is on.
Preparing the Mounting Area
Caution:
If you do not make the connections
in the order shown, damage to the amplifier
and your auto sound system is possible if
any wire connections are made incorrectly.
In addition to the supplied hardware, you
need these materials:
• an adapter harness
• additional wire
Note:
For easier installation, mark each wire
you plan to connect with the name of the ter-
minal you will connect it to.
• shielded audio cables
BEFORE YOU MAKE THE
CONNECTIONS
• 16- or 18-gauge marked or color-coded
wire.
The supplied connection cables include all
the lead wires you need to connect the am-
plifier to ground, power, and your existing
auto sound system.
Confirm that the amplifier fits in your vehi-
cle’s available mounting area. This amplifier
requires a 51/2-inch high by 93/4-inch wide by
113/4-inch deep (13.9 × 23.5 × 29.8 cm)
mounting area.
Important:
Routing Cables and Wires
• Do not cut any of the supplied wires. If
you cut any wire, you cannot obtain a
refund or exchange on this product.
However, RadioShack will provide war-
ranty service if you cut a wire and find
the product is defective.
Avoid routing the connection cables and any
speaker wires near moving parts or sharp
edges. You can usually route wires and ca-
bles along the wiring channel beneath the
vehicle’s door facings by carefully removing
the molding that holds the carpet in place. Af-
ter routing the cables and wires, replace the
molding.
• If the connectors on your vehicle’s auto
sound system are not compatible with
the amplifier’s connectors, you might
need an adapter harness to complete
the connections. Your local RadioShack
store has adapter harnesses for most
vehicles.
INSTALLATION ORDER
For trouble-free installation, simply follow the
sections in this owner’s manual in order.
First, make all the connections temporarily
by connecting the amplifier to:
You might need additional wire, depending
on your individual auto sound system, to
complete the connections. Your local Ra-
dioShack store has a variety of wire and wire
accessories.
1
2
3
Ground and power
Your auto sound system’s outputs
Your speakers
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Preparation
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Cautions:
per channel). Each speaker must have
an impedance of at least 4 ohms. Your
local RadioShack store has a large vari-
ety of speakers.
• For added safety and to protect your
amplifier and auto sound system, dis-
connect the cable from your vehicle’s
–
negative ( ) battery terminal before you
begin.
To make it easier to gauge wire length and
connect the amplifier, temporarily place the
amplifier as close as possible to the selected
mounting location.
• Be sure your speakers can handle as
much as 110 watts of power (55 watts
CONNECTING GROUND AND SWITCHED/PRIMARY POWER
Blue/White
AMP Remote Turn On
Black
Vehicle’s Battery
Chassis
Ground
Switched Power Lead
Auto Sound System
Follow these steps to connect the amplifier to
ground, switched power, and primary power.
vehicle’s frame. Be sure the bolt is not
insulated from the chassis by a plastic
part.
1. If you have not done so already, discon-
nect the cable from your vehicle’s nega-
4. Use a screwdriver to connect the spade
end of the supplied blue/white wire to
–
tive ( ) battery terminal.
REM
the amplifier’s
minal.
(remote power) ter-
2. Use a screwdriver to connect the spade
end of the supplied black ground wire to
GND
a
the amplifier’s
(ground) terminal.
5.
If your auto sound system has
switched power lead, connect the blue/
white wire’s other end to your auto
sound system’s switched power lead
3. Connect the black ground wire’s other
end to a chassis ground, such as a
metal bolt attached to a metal part of the
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Preparation
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using one of the supplied twist-on termi-
nal connectors.
This connection turns on the amplifier
when you turn on the auto sound sys-
tem, and turns off the amplifier when
you turn off the auto sound system. This
prevents your vehicle’s battery from
being drained if you leave your amplifier
on when you turn your auto sound sys-
tem off.
If your auto sound system does not have
a switched power lead, connect the
blue/white wire’s other end to a point in
your vehicle’s fuse block that has power
only when you turn on the ignition or turn
the key to ACC.
This connection turns on the amplifier
when you turn on the ignition or turn the
key to ACC, and turns off the amplifier
when you turn off the ignition. This pre-
vents your vehicle’s battery from being
drained if you leave your amplifier on
when you turn off the ignition.
6. Use a screwdriver to connect the spade
end of the supplied red power cable
(with in-line fuse holder) to the ampli-
+ 12V
fier’s
terminal.
7. Connect the other end of the red power
+
cable to your vehicle’s positive ( ) bat-
tery terminal. Then tighten the terminal.
Caution:
Due to the amplifier’s high cur-
rent requirement, you must connect the
red power cable’s fused end directly to
the vehicle’s positive (+) battery terminal
or damage to your vehicle’s wiring could
result.
Do not reconnect your vehicle’s negative (–)
battery cable yet.
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Preparation
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ˆ Connecting Inputs
LOW-LEVEL INPUTS
You can connect your auto sound system’s low-level line out jacks to the amplifier’s low-level
line in jacks.
If your auto sound system does not have low-level line out jacks, see “High-Level (Speaker
Wire) Inputs” on Page 9 to connect your amplifier.
Note:
For the best results, use shielded audio cables (not supplied) available at your local Ra-
dioShack store.
1. Temporarily place the amplifier as close as possible to the selected mounting location.
2. If your auto sound system has two line out jacks, connect the auto sound system to the
amplifier as shown:
Right
Left
Auto Sound System
Note: If your auto sound system has four separate line out jacks
, use the auto sound sys-
tem’s front left and right jacks to make this connection.
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Connecting Inputs
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Note:
A floating ground connection lets the
HIGH-LEVEL (SPEAKER
WIRE) INPUTS
amplifier provide more power to each speak-
er, but requires that you connect a separate
wire to each speaker terminal. A common
ground connection lets you use fewer wires
to connect the speakers to the amplifier, but
reduces the amount of power supplied to the
speakers from the amplifier.
If your auto sound system does not have
low-level line out jacks but has only speaker
outputs, connect your auto sound system’s
HIGH IN-
speaker outputs to the amplifier’s
PUT
jacks.
Use the supplied wire harness and the sup-
plied twist-on terminal connectors to make
the appropriate connections.
• If your auto sound system has four
speaker outputs, see “Four Speaker
Outputs” on Page 10 to connect your
system’s speaker outputs to the ampli-
fier using either a floating or common
ground connection.
• If your auto sound system has two
speaker outputs, see “Two Speaker Out-
puts” on Page 11 to connect your sys-
tem’s speaker outputs to the amplifier
using either
a
floating or common
ground connection.
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Connecting Inputs
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Four Speaker Outputs
Floating Ground Connection
White/Black
Gray/Black
Right Front
Speaker
Left Front
Speaker
Auto Sound System
Common Ground Connection
Right Front
Speaker
Left Front
Speaker
Auto Sound System
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Connecting Inputs
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Two Speaker Outputs
Floating Ground Connection
Gray/Black
White/Black
Auto Sound System
Common Ground Connection
Auto Sound System
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Connecting Inputs
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CONNECTING SPEAKERS
You can connect two speakers or a subwoof-
er to the amplifier and your auto sound sys-
tem.
2. Separate each wire’s two conductors at
both ends for a length of about 4 inches.
3. Strip the insulation from the ends of
each conductor to expose 1/4 inch of
wire. Twist the ends to secure loose
strands.
• If you are connecting two speakers, fol-
low Steps 1–3 under “Preparing the
Speaker Wires” then see “Connecting
Two Speakers” on Page 13 to connect
the speakers to the amplifier.
Conductors
1/4
Inch
• If you are connecting a subwoofer, follow
Steps 1–3 under “Preparing the Speaker
Wires” then see “Connecting a Sub-
woofer” on Page 13 to connect a sub-
woofer to the amplifier.
4 Inches
Preparing the Speaker Wires
Caution:
You must connect a separate wire
to each speaker terminal as described in the
following procedures. Unless your auto
sound system’s speakers use a common
ground wire, do not use a common wire or
chassis ground for speaker connections.
Notes:
• We recommend you use 16- or 18-
gauge marked or color-coded wires to
help you correctly connect the speakers
to your amplifier.
• Color-coded wires have a stripe running
down one of the conductors or different
colored insulation for each conductor.
Your local RadioShack store has a wide
selection of speaker wire to choose
from.
• For the maximum bass response and
the best overall performance, keep your
speakers properly phased (connect + to
+ and – to –).
1. With the speakers placed in their
approximate locations, run one wire
from each speaker to the amplifier.
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Connecting Inputs
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