Radio Shack Stereo Amplifier XL 260 User Guide

12-2017.fm Page 1 Tuesday, May 9, 2000 10:02 AM  
XL-260 High Power  
4/3/2-Channel Bridgeable  
Amplifier  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 3 Tuesday, May 9, 2000 10:02 AM  
ˆ Features  
Your RadioShack High Power 4/3/2-Chan-  
nel Bridgeable Amplifier produces a total of  
260 watts to give added punch and power to  
your vehicle’s existing auto sound system.  
Power Indicator  
supplied to the amplifier.  
— lights when power is  
Protection Indicator  
shuts itself down.  
— lights if the amplifier  
The amplifier produces up to 130 watts per  
channel (if bridged) of clean, powerful sound  
at all audio frequencies with minimum distor-  
tion. You can connect your auto sound sys-  
tem’s low-level or speaker-level outputs to  
this amplifier.  
Crossover Frequency Circuit  
— lets you  
adjust the crossover frequency from 45–400  
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.  
Its features include:  
14K Gold-Plated Noise-Isolated Low-Lev-  
el Input Jacks  
— let you connect low-level  
Auto-Off  
— temporarily shuts down the am-  
(preamplifier) signal inputs to match your  
auto sound system’s output for the best high-  
fidelity performance.  
plifier to protect the amplifier from overheat-  
ing or input overloads. The amplifier restarts  
automatically when it cools or the problem is  
corrected.  
14K Gold-Plated Speaker Terminals  
— de-  
signed for low impedance, high conductivity,  
and minimum corrosion, to provide the high-  
est signal transfer and lowest sound distor-  
tion.  
THE FCC WANTS YOU TO  
KNOW  
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:  
Input Level Controls  
level of the audio signals that enter the am-  
plifier.  
— let you adjust the  
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).  
• moving your amplifier away from the  
receiver  
Bridging Capability  
— lets you combine the  
• contacting your local RadioShack store  
for help  
amplifier’s four 65-watt channels so you can  
use the amplifier with only two channels that  
produce a total of 130 watts from each chan-  
nel.  
If you cannot eliminate the interference, the  
FCC requires that you stop using your ampli-  
fier.  
Mute Turn On Circuit  
— eliminates the  
thump you hear when you turn on some am-  
plifiers.  
3
Features  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 4 Tuesday, May 9, 2000 10:02 AM  
ˆ Preparation  
SUPPLIED HARDWARE  
Your amplifier comes with the following items. Be sure you locate everything shown before you  
store or dispose of the packing materials.  
FUSE 40A  
Power Wire (Red) (1)  
Ground Wire (Black) (1)  
Remote Wire (Blue/White) (1)  
Flat Washers (4)  
4-Pin Connector with Wire (2)  
Sheet Metal Screws (4)  
Twist-On  
Terminal  
Connectors (9)  
Lock Washers (4)  
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.  
Also, be aware that installation in your vehi-  
cle might require cutting or modifying your  
vehicle.  
Choosing a Mounting Location  
• 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.)  
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 not interfere with the vehicle’s  
operation  
• How do I connect a wire to the fuse box?  
• Lets you drill mounting holes without  
damaging other vehicle components  
• Which of the auto sound system’s wires  
is the power wire?  
• Allows enough space around the cooling  
fins for proper airflow and cooling  
• Which of the auto sound system’s termi-  
nals are low-level outputs and which are  
high-level (speaker) outputs?  
• Lets you easily see the amplifier’s  
POWER and PROTECTION indicators  
4
Preparation  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 5 Tuesday, May 9, 2000 10:02 AM  
Warning:  
The amplifier gets very hot while it  
Then test the connections. When you verify  
that everything works as expected, discon-  
nect the amplifier, mount it in your vehicle,  
and reconnect it.  
is on. Do not touch the amplifier or place  
flammable objects near it.  
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.  
Before you mount the amplifier, make sure  
you have 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  
wires  
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.  
Then confirm that the amplifier fits in your ve-  
hicle’s available mounting area. This amplifi-  
er requires a 51/2-inch high by 131/2-inch  
wide by 171/2-inch deep (13.9 × 34.3 × 43.1  
cm) mounting area with adequate ventilation  
space.  
Important:  
• Do not cut these wires. If you cut any  
wire, you cannot obtain a refund or  
exchange on this product. However,  
RadioShack will provide warranty ser-  
vice if you cut a wire and find the prod-  
uct is defective.  
Routing Cables and Wires  
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. RadioShack stores sell  
adapter harnesses for most vehicles.  
INSTALLATION ORDER  
You might need additional wire, depending  
on your individual auto sound system, to  
complete the connections. Your local Ra-  
dioShack store carries a full line of wire and  
wire management accessories.  
For trouble-free installation, simply follow the  
sections in this owner’s manual in order. First  
make all the connections by temporarily con-  
necting the amplifier to:  
1
2
3
Ground and power  
Your auto sound system’s outputs  
Your speakers  
5
Preparation  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 6 Tuesday, May 9, 2000 10:02 AM  
Cautions:  
• 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.  
• Be sure your speakers can handle as  
much as 260 watts of power (130 watts  
per channel if you connect your auto  
sound system to one pair of speakers  
and bridge the amplifier’s outputs, or 65  
watts per channel if you connect your  
auto sound system to two pairs of  
speakers or one pair of speakers and a  
subwoofer). Each speaker must have an  
impedance of at least 4 ohms. Your local  
RadioShack store carries a full line of  
speakers.  
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.  
6
Preparation  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 7 Tuesday, May 9, 2000 10:02 AM  
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.  
using one of the supplied twist-on termi-  
nal connectors.  
1. If you have not done so already, discon-  
nect the cable from your vehicle’s nega-  
tive (–) battery terminal.  
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 off your auto sound  
system.  
2. Use a screwdriver to connect the spade  
end of the supplied black ground wire to  
GND  
the amplifier’s  
(ground) terminal.  
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  
vehicle’s frame. Be sure the bolt is not  
insulated from the chassis by a plastic  
part.  
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.  
4. Use a screwdriver to connect the spade  
end of the supplied blue/white wire to  
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.  
REM  
the amplifier’s  
minal.  
(remote power) ter-  
5. If your auto sound system has  
a
switched power lead, connect the blue/  
white wire’s other end to your auto  
sound system’s switched power lead  
7
Preparation  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 8 Tuesday, May 9, 2000 10:02 AM  
Caution:  
6. Use a screwdriver to connect the spade  
end of the supplied red power cable  
(with in-line fuse holder) to the ampli-  
fier’s + 12V terminal.  
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.  
7. Connect the other end of the red power  
cable to your vehicle’s positive (+) bat-  
tery terminal as shown. Then tighten the  
terminal.  
Do not reconnect your vehicle’s negative (–)  
battery cable yet.  
ˆ Connecting Inputs  
Note:  
For the best results, use shielded au-  
LOW-LEVEL INPUTS  
dio cables (not supplied) available at your lo-  
cal RadioShack store.  
You can connect your auto sound system’s  
low-level line out jacks to the amplifier’s low-  
level line in jacks.  
1. Temporarily place the amplifier as close  
as possible to the selected mounting  
location.  
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.  
2. If your auto sound system has four sep-  
arate line out jacks, connect the auto  
sound system to the amplifier.  
Right Front  
Left Front  
Right Rear  
Auto Sound System  
Left Rear  
8
Connecting Inputs  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 9 Tuesday, May 9, 2000 10:02 AM  
If your auto sound system has two line out jacks (left and right), connect the auto sound system  
to the amplifier.  
Left  
Right  
Auto Sound System  
Note:  
For the best results, use shielded audio Y-adapters (not supplied) available at your local  
RadioShack store.  
using either  
ground connection.  
a
floating or common  
HIGH-LEVEL (SPEAKER  
WIRE) INPUTS  
Note:  
A floating ground connection lets the  
If your auto sound system does not have  
low-level line out jacks but has only speaker  
outputs, connect your auto sound system’s  
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.  
HIGH IN-  
speaker outputs to the amplifier’s  
PUT  
jacks.  
• 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.  
Use the supplied wire harnesses and the  
supplied twist-on terminal connectors to  
make the appropriate connections.  
• 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  
9
Connecting Inputs  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 10 Tuesday, May 9, 2000 10:02 AM  
Four Speaker Outputs  
Floating Ground Connection  
Gray/Black  
Violet/Black  
Green/Black  
White/Black  
Auto Sound System  
Common Ground Connection  
Violet/Black  
Green/Black  
Gray/Black  
White/Black  
Auto Sound System  
10  
Connecting Inputs  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 11 Tuesday, May 9, 2000 10:02 AM  
Two Speaker Outputs  
Floating Ground Connection  
Violet/Black  
Violet  
Green/Black  
Green  
Auto Sound System  
Common Ground Connection  
Violet/Black  
Violet  
Green/Black  
Green  
Auto Sound System  
11  
Connecting Inputs  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 12 Tuesday, May 9, 2000 10:02 AM  
3. Strip the insulation from the ends of  
each conductor to expose 1/4 inch of  
wire. Twist the ends to secure loose  
strands.  
CONNECTING SPEAKERS  
You can connect four speakers, two speak-  
ers and a subwoofer, or just two speakers to  
the amplifier and your auto sound system.  
Important:  
tions, make sure both  
Before you make the connec-  
Conductors  
1/4 Inch  
BRG/ST  
switches (on  
the left and right sides of the amplifier) are  
ST  
set to  
.
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.  
• 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.  
If you are connecting a subwoofer, run  
two wires from each of the subwoofer’s  
terminals to the amplifier.  
2. Separate each wire’s two conductors at  
both ends for a length of about 4 inches.  
12  
Connecting Inputs  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 13 Tuesday, May 9, 2000 10:02 AM  
Connecting Four Speakers  
CH2 Front  
Right Speaker  
CH1 Front  
Left Speaker  
CH3 Rear  
Left Speaker  
CH4 Rear  
Right Speaker  
CH2 (+)  
and  
1. Use a screwdriver to connect the front  
left speaker’s positive (+) wire to the  
(–) wires to the amplifier’s  
CH2 (–)  
terminals.  
CH1 (+)  
amplifier’s  
terminal.  
4. Repeat Steps 1–3 to connect the rear  
left and rear right speaker’s positive (+)  
and negative (–) wires to the amplifier’s  
2. Use a screwdriver to connect the front  
left speaker’s negative (–) wire to the  
CH1 (–)  
CH3 (+) CH3 (–) CH4 (+)  
CH4 (–)  
, and ter-  
amplifier’s  
terminal.  
,
,
minals.  
3. Repeat Steps 1–2 to connect the front  
right speaker’s positive (+) and negative  
Connecting Two Speakers (Unbridged Connection)  
Left Speaker  
Right Speaker  
If you do not have high-power speakers, use  
this connection. This connection produces  
65 watts per channel.  
2. Use a screwdriver to connect the left  
speaker’s negative (–) wire to the ampli-  
CH3 (–)  
fier’s  
terminal.  
1. Use a screwdriver to connect the left  
speaker’s positive (+) wire to the ampli-  
3. Repeat Steps 1–2 to connect the right  
speaker’s positive (+) and negative (–)  
CH3 (+)  
CH4 (+) CH4  
and  
fier’s  
terminal.  
wires to the amplifier’s  
(–)  
terminals.  
13  
Connecting Inputs  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 14 Tuesday, May 9, 2000 10:02 AM  
Connecting Two Speakers (Bridged Connection)  
Right Speaker  
Left Speaker  
Caution:  
This connection produces 130  
2. Use a screwdriver to connect the left  
speaker’s negative (–) wire to the ampli-  
watts per channel. Use this connection only if  
you have high-power speakers that can han-  
dle a power output of 130 watts.  
CH2 (+)  
fier’s  
terminal.  
3. Repeat Steps 1–2 to connect the right  
speaker’s positive (+) and negative (–)  
Note: CH2 (+)  
CH4 (+)  
are used as nega-  
and  
CH3 (+) CH4  
and  
tive (–) terminals for a bridged connection.  
wires to the amplifier’s  
(+)  
terminals.  
1. Use a screwdriver to connect the left  
speaker’s positive (+) wire to the ampli-  
BRG/ST  
4. Set both  
switches (on the left  
CH1 (+)  
BRG  
.
fier’s  
terminal.  
and right sides of the amplifier) to  
Connecting Two Speakers and One Subwoofer (Unbridged Connection)  
Or  
CH1 Front  
CH2 Front  
CH3 Rear  
CH4 Rear  
Left Speaker  
Right Speaker  
Subwoofer  
Subwoofer  
1. Use a screwdriver to connect the front  
left speaker’s positive (+) wire to the  
2. Use a screwdriver to connect the front  
left speaker’s negative (–) wire to the  
CH1 (+)  
CH1 (–)  
terminal.  
amplifier’s  
terminal.  
amplifier’s  
14  
Connecting Inputs  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 15 Tuesday, May 9, 2000 10:02 AM  
3. Repeat Steps 1–2 to connect the front  
right speaker’s positive (+) and negative  
5. Repeat Step 4 to connect the sub-  
woofer’s negative (–) wire to the ampli-  
fier’s negative (–) terminal for the same  
channel you connected in Step 4. For  
example, if you connected the sub-  
woofer’s positive (+) wire to the ampli-  
CH2 (+)  
(–) wires to the amplifier’s  
and  
CH2 (–)  
terminals.  
4. Use a screwdriver to connect the sub-  
woofer’s positive (+) wire to the ampli-  
CH3 (+)  
fier’s  
terminal, connect the  
CH3 (+) or CH4 (+)  
fier’s  
terminal.  
subwoofer’s negative (–) wire to the  
CH3 (–)  
amplifier’s  
terminal.  
Connecting Two Unbridged Speakers and One Bridged Subwoofer  
CH1 Front  
Left Speaker  
CH2 Front  
Right Speaker  
Subwoofer  
Note: CH4 (+)  
nal for a bridged connection.  
is used as a negative (–) termi-  
5. Repeat Step 4 to connect the sub-  
woofer’s negative (–) wire to the ampli-  
CH4 (+)  
fier’s  
terminal.  
1. Use a screwdriver to connect the left  
front speaker’s positive (+) wire to the  
BRG/ST  
6. Make sure the  
switch on the  
CH1 (+)  
right  
ST  
side of the amplifier is set to  
amplifier’s  
terminal.  
,
BRG/ST  
then set the  
switch on the  
left  
2. Use a screwdriver to connect the left  
front speaker’s negative (–) wire to the  
BRG  
side of the amplifier to  
.
CH1 (–)  
amplifier’s  
terminal.  
3. Repeat Steps 1–2 to connect the right  
front speaker’s positive (+) and negative  
CH2 (+)  
(–) wires to the amplifier’s  
and  
CH2 (–)  
terminals.  
4. Use a screwdriver to connect the sub-  
woofer’s positive (+) wire to the ampli-  
CH3 (+)  
fier’s  
terminal.  
15  
Connecting Inputs  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 16 Tuesday, May 9, 2000 10:02 AM  
ˆ Completing the Installation  
and auto sound system operate properly.  
The amplifier turns on after a few seconds.  
TESTING THE  
CONNECTIONS  
If you cannot quickly confirm whether the  
auto sound system and amplifier are working  
Before you continue, make sure you have  
securely made all connections. Then recon-  
turn off your vehicle’s ignition  
properly,  
nect the cable to the vehicle’s negative ( )  
and disconnect the cable from your vehi-  
battery terminal.  
cle’s negative (–) battery terminal.  
Then  
recheck your connections.  
LEVEL (MIN/MAX)  
Set  
on the left and right  
sides of the amplifier to its mid position (see  
“Adjusting the Audio Level” on Page 18).  
Then turn on your vehicle’s ignition and auto  
sound system to confirm that the amplifier  
After you test the auto sound system and  
amplifier and verify that everything is proper-  
ly connected and working, follow the instruc-  
tions in “Mounting the Amplifier.”  
MOUNTING THE AMPLIFIER  
Sheet Metal Screw  
Lock Washer  
Flat Washer  
9/64-Inch  
Mounting  
Holes  
Chassis  
or Car Mat  
Note:  
Once you verify that the amplifier is connect-  
ed properly, follow these steps to mount it.  
If you have not already done so,  
be sure to mark each wire with the name  
of the terminal you will reconnect it to.  
1. Disconnect the cable from the vehicle’s  
negative (–) battery terminal.  
3. Using the mounting holes on the ampli-  
fier as a guide, mark the positions for the  
mounting holes.  
2. To make mounting more convenient,  
temporarily disconnect the amplifier’s  
connections (ground, primary power,  
remote power, your auto sound system’s  
input, and speakers).  
4. Drill 9/64-inch (3.57 mm) holes at the  
marked locations, being careful not to  
damage anything behind the mounting  
surface.  
16  
Completing the Installation  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 17 Tuesday, May 9, 2000 10:02 AM  
5. Secure the amplifier to the mounting  
surface using the supplied sheet metal  
screws and washers.  
6. Reconnect the wiring.  
7. Reconnect the cable to the vehicle bat-  
tery’s negative (–) terminal.  
8. Reset your vehicle’s clock, your auto  
sound system’s tuner memory, and  
other timer/memory devices.  
17  
Completing the Installation  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 18 Tuesday, May 9, 2000 10:02 AM  
ˆ Operation  
LEVEL (MIN/  
1. Use a screwdriver to turn  
TURNING ON THE  
AMPLIFIER  
MAX)  
on the left and right sides of the  
MIN  
amplifier fully counterclockwise to  
.
The amplifier automatically turns on a few  
seconds after you turn your vehicle’s ignition  
switch to ACC or ON or turn on your auto  
sound system, depending on how you wired  
POWER  
the system. The  
indicator on the side  
of the amplifier lights when the amplifier is  
on.  
2. Turn the auto sound system’s volume  
control to about one-third of its full  
range.  
3. On the left and right sides of the ampli-  
LEVEL (MIN/MAX)  
fier, adjust  
to a com-  
fortable listening level.  
4. Turn up the auto sound system’s volume  
control until the sound begins to distort.  
Then immediately turn the volume down  
to a point just before where the distor-  
tion began.  
Important:  
Your amplifier requires 31 amps  
or more of power from your vehicle’s battery  
during operation. To protect your battery  
from discharging, do not operate the amplifi-  
er unless your vehicle is running.  
Caution:  
Never turn up the auto sound  
Note:  
Your amplifier temporarily shuts down  
system’s volume control more than  
needed to adjust the audio level, or  
more than two-thirds of its maximum vol-  
ume.  
if it gets too hot, then restarts automatically  
once it cools.  
ADJUSTING THE AUDIO  
LEVEL  
5. On the left and right sides of the ampli-  
LEVEL (MIN/MAX)  
fier, adjust  
until the  
For the best performance, you must set  
LEVEL (MIN/MAX) on the left and right sides  
of the amplifier to adjust the level of the  
audio signals that enter the amplifier.  
sound is at the maximum level you want  
the amplifier to produce.  
6. Adjust the auto sound system’s volume  
control to a comfortable listening level.  
18  
Operation  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 19 Tuesday, May 9, 2000 10:02 AM  
ADJUSTING FREQUENCY  
CROSSOVER  
If you installed a subwoofer using the steps  
in “Connecting Two Speakers and One Sub-  
woofer (Unbridged Connection)” on Page 14  
or “Connecting Two Unbridged Speakers  
and One Bridged Subwoofer” on Page 15,  
X-OVER FREQ ON/OFF  
ON  
, then adjust  
set  
to  
X-OVER FREQ  
for your particular vehicle’s  
acoustics. The amplifier passes through all  
frequencies at or below that setting (45400  
Hz).  
Note: X-OVER FREQ  
selects the limit at which  
the amplifier will pass frequencies (from 45−  
400 Hz). You should not use it to adjust the  
sound you hear through your main speakers.  
19  
Operation  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 20 Tuesday, May 9, 2000 10:02 AM  
ˆ Troubleshooting  
We do not expect you to have any problems with your RadioShack High Power 4/3/2-Channel  
Bridgeable Amplifier, but if you do have a problem, this chart might help. If not, take the ampli-  
fier to your local RadioShack store for assistance.  
Symptom  
Possible Cause  
Power problem.  
Suggestion  
No power the amplifier’s  
Check the amplifier’s and auto  
sound system’s fuses and  
replace them if necessary (see  
“Replacing a Fuse” on  
Page 22).  
POWER  
indicator does not light  
after the vehicle’s auto sound  
system is turned on  
Vehicle’s ignition not turned on. Start the vehicle.  
Amplifier not connected to auto Check all connections.  
sound system/vehicle correctly.  
No sound  
Auto sound system not turned  
on or volume set to minimum.  
Turn the auto sound system on  
or adjust its volume.  
LEVEL (MIN/MAX)  
controls set to minimum.  
LEVEL (MIN/MAX)  
.
Amplifier’s  
Adjust  
Amplifier not connected to auto Check all connections.  
sound system/vehicle correctly.  
The amplifier might have shut  
down.  
Turn your auto sound system off  
and let the amplifier cool. Make  
sure the amplifier is properly  
ventilated. Then turn your auto  
sound system back on. The  
amplifier turns itself back on  
when it is cooled.  
The amplifier detected an input  
overload. Reduce the auto  
sound system’s volume.  
Power problem.  
Check the amplifier’s and auto  
sound system’s fuses and  
replace them if necessary (see  
“Replacing a Fuse” on  
Page 22).  
Distorted sound  
The amplifier might be receiving Reduce your auto sound sys-  
too much input power from your tem’s output power (if possi-  
auto sound system.  
ble), or reduce the auto sound  
system’s volume.  
20  
Troubleshooting  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 21 Tuesday, May 9, 2000 10:02 AM  
Symptom  
Possible Cause  
Suggestion  
Distorted sound (continued)  
The amplifier might have shut  
down.  
Turn your auto sound system off  
and let the amplifier cool. Make  
sure the amplifier is properly  
ventilated. Then turn your auto  
sound system back on. The  
amplifier turns itself back on  
when it is cooled.  
An output channel might have  
shorted.  
Take the amplifier to your local  
RadioShack store.  
The amplifier’s PROTECTION  
indicator lights  
Amplifier not connected to auto Check all connections.  
sound system correctly.  
The amplifier might be receiving Reduce your auto sound sys-  
too much power from your auto tem’s output power (if possi-  
sound system.  
ble), or reduce the auto sound  
system’s volume.  
21  
Troubleshooting  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 22 Tuesday, May 9, 2000 10:02 AM  
2. Push together and twist the fuse  
holder’s parts on the red power cable  
until they spring apart. Then remove the  
fuse.  
CARE  
To enjoy your amplifier for a long time:  
• Keep the amplifier dry. If it gets wet,  
wipe it dry immediately.  
• Use and store the amplifier only in nor-  
mal temperature environments.  
Fuse  
• Handle the amplifier gently and care-  
fully. Do not drop it.  
3. If the fuse is blown, replace it. Use only  
an SFE-type fuse with the proper rating  
(available at many automotive supply  
stores). The fuse must be 40 amps.  
• Keep the amplifier away from dust and  
dirt.  
• Wipe the amplifier with a damp cloth  
occasionally to keep it looking new.  
4. Reassemble the fuse holder by inserting  
the fuse into the longer of the fuse  
holder’s ends, and pushing together and  
twisting the two parts until they latch  
together.  
Modifying or tampering with the amplifier’s  
internal components can cause a malfunc-  
tion and might invalidate its warranty and  
void your FCC authorization to operate it. If  
your amplifier is not performing as it should,  
take it to your local RadioShack store for as-  
sistance.  
5. Reconnect the cable to the vehicle’s  
negative (–) battery terminal.  
Replacing the Blade-Type Fuses  
1. Disconnect the cable from the vehicle’s  
negative (–) battery terminal.  
REPLACING A FUSE  
If the amplifier does not operate, you might  
need to replace the red power cable’s 40-  
amp SFE-type fuse or one or both of the 20-  
amp blade-type fuses on the amplifier’s back  
panel. Check all fuses.  
2. For each fuse, grasp its plastic end and  
pull it out of the back of the amplifier.  
Important:  
Let the amplifier cool down and  
see if it starts again before you assume a  
fuse needs to be replaced.  
Caution:  
Do not use a fuse with ratings other  
3. If the fuse is blown, replace it. Use only  
a blade-type fuse with the proper rating.  
The fuse must be 20 amps.  
than those specified. Doing so might damage  
your amplifier.  
Replacing the SFE-Type Fuse  
4. Grasp the fuse’s plastic end and push it  
in.  
1. Disconnect the cable from the vehicle’s  
negative (–) battery terminal.  
5. Reconnect the cable to the vehicle’s  
negative (–) battery terminal.  
22  
Troubleshooting  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 23 Tuesday, May 9, 2000 10:02 AM  
ˆ Specifications  
Output Power:  
Stereo ....................................................................... 45 Watts × 4 @ 4 Ohms, 20–20 kHz, 0.5% THD  
65 Watts × 4 @ 4 Ohms, 20–20 kHz, 10% THD  
60 Watts × 4 @ 2 Ohms, 20–20 kHz, 1% THD  
Bridged .................................................................................. 130 Watts @ 4 Ohms, 1 kHz, 10% THD  
Frequency Response ................................................................................................ 20–20,000 Hz (±3 dB)  
Power Supply Voltage ..................................................................................... 14.4 V DC Negative Ground  
Maximum Current Draw ........................................................................................................................ 40 A  
Dimensions (HWD) .............................................................................................. 25/8 × 101/4 × 141/2 Inches  
(6.0 × 26 × 37 cm)  
Net Weight .......................................................................................................................................... 7.0 lbs  
(3.2 kg)  
Specifications are typical; individual units might vary. Specifications are subject to change and improve-  
ment without notice.  
23  
Specifications  
Download from Www.Somanuals.com. All Manuals Search And Download.  
12-2017.fm Page 24 Tuesday, May 9, 2000 10:02 AM  
Limited One-Year Warranty  
This product is warranted by RadioShack against manufacturing defects in material and workman-  
ship 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, Ra-  
dioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED 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 RE-  
SPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY WITH RESPECT TO ANY  
LIABILITY, LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE OR PERFOR-  
MANCE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WARRANTY, IN-  
CLUDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVENIENCE, LOSS  
OF TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT, SPECIAL, INCIDEN-  
TAL, 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 limita-  
tion 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 RadioShack  
sales receipt as proof of purchase date to any RadioShack store. RadioShack will, at its option, un-  
less otherwise provided by law: (a) correct the defect by product repair without charge for parts and  
labor; (b) replace the product with one of the same or similar design; or (c) refund the purchase  
price. All replaced parts and products, and products on which a refund is made, become the prop-  
erty of RadioShack. New or reconditioned parts and products may be used in the performance of  
warranty service. Repaired or replaced parts and products 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 current; (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, shipping or insurance costs; or (f) costs  
of product removal, installation, set-up service adjustment 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  
RadioShack  
A Division of Tandy Corporation  
Fort Worth, Texas 76102  
12-2017  
05A00  
Printed in China  
Download from Www.Somanuals.com. All Manuals Search And Download.  

PYLE Audio Stereo Amplifier PTVT790A User Guide
Radica Games Games 73009 User Guide
Radio Shack Scanner Pro 95 User Guide
Renesas Computer Drive M3S UFLA32R User Guide
Rogue Audio Stereo Amplifier Stereo 90 User Guide
Roland Music Mixer VR 3 User Guide
Rover Lawn Mower ProCut 50 User Guide
Royal Sovereign Laminator APL 330U User Guide
Samsung Cell Phone GH68 04847A User Guide
Sanyo Security Camera VCC MC700P User Guide