Roadmaster Stereo Amplifier VRA40 User Guide

VRA4.0D  
Four Channel  
Digital Amplifier  
Read the following wiring instructions very carefully. If you any trouble understanding any  
of these instructions, have the amplifier professionally installed by an experienced technician.  
Incorrect wiring will prevent the amplifier from operating, or will damage the amplifier.  
Automotive audio equipment installations can be troublesome at times, even to the most experienced of  
installation technicians. If you are not confident working with electrical wiring, removing and reinstalling  
interior panels, carpeting, dashboards or other components of your vehicle, please call our toll free help  
line (800)445-1797 and our in-house technical service team will answer your installation questions.  
Virtual Reality Sound Labs  
SERIOUS SOUND  
Recommended Method For Splicing Wires  
#1  
#2  
#3  
Tools Needed For Installation:  
• Nail Set/Center Punch  
• Phillips Screwdriver  
• Hammer  
• Wire Cutter  
• Safety Glasses  
• Marker/Pen  
• Electrical Tape  
• Electric Drill with 1/16" bit  
Dear Customer,  
CONGRATULATIONS. The VRA4.0 Four Channel Amplifier, when used as described, will give you years of  
dependable service in your car, truck, RV or mini-van. We have taken numerous measures in quality control to  
ensure that your product arrives in top condition, and will perform to your satisfaction. In the rare event that your  
VRA4.0 Four Channel Amplifier contains a damaged or missing item, does not perform as specified, requires  
warranty service or you have a installation problem. DO NOT RETURN THIS PRODUCT TO THE STORE. Please  
call our TOLL FREE number US (800-445-1797) and ask to speak with a member of our technical service team, or  
submit your questions by E-Mail to [email protected] and a member of our technical service team will  
respond by E-Mail to your questions. Our in-house technical service team will expedite delivery of your part, or  
advise you on installation, or help troubleshoot a problem with you. If your product needs warranty service, our  
technical service team representative will help you obtain the fastest remedy, possible under the warranty.  
Twist together and bend as shown.  
Strip 1/2" of insulation from the ends of the wires..  
Wrap with electrical tape.  
We recommend an Amplifier Installation Kit containing the following parts:  
1. Power Terminal  
1. Disconnect the negative(-) battery terminal from the negative battery post.  
2. Remove the fuse(s) from the amplifier.  
3. Strip Ω" of insulation from the end of the 8 gauge power wire. Connect the 8 gauge power wire to the  
• Power Wire - 8 Gauge w/Terminal Lug  
• Remote Wire - 20 Gauge OK  
• Speaker Wire - 16 to 12 Gauge  
• Input Wires - Shielded RCA cables  
• RCA "Y" Adaptors  
• After-Market Battery terminal  
after-market positive battery terminal according to the maunfacturer's installation instructions.  
Location  
When choosing a location for the amplifier, keep in mind that the amplifier will generate heat. Place the amplifier in  
a location that allows for air to circulate around it. Amplifier location and installation will vary from vehicle to vehicle,  
depending on physical layout of the vehicle. Carefully consider as many installation locations and configurations as  
is practically possible DO NOT COVER the amp with carpet or enclose it behind interior panels. DO NOT mount  
inverted or upside down. The amplifier may be mounted vertically.  
After Market Positive Terminal (  
+)  
To Amplifier Power Terminal  
Vehicle's Positive(  
12 volt power cable  
+)  
Before permanently installing your VRA 4.0 amplifier, place the VRA 4.0 amplifier in the approximate place it will  
occupy in your car, run all power and speaker wires inside the vehicle toward the amplifier prior to mounting. This  
will allow you to estimate how much wire you'll need, and where to route the wires inside of your vehicle.  
In-line 30 amp Fuse or Circuit Breaker  
• 400 Watts Total Peak Power  
• Input Sensitivity: 250 mv to 6 Volts  
(not included)  
• 4 X 100 Watts Peak into 4 Ohm @ 1Khz (+/- 5%)  
• 4 X 50 Watts RMS into 4 Ohm @ 1 Khz (+/- 5%)  
• Measured at 14.4 VDC Input Voltage  
• Frequency Response: 20 Hz to 35,000 Hz +/- 3 db  
• THD: Less than 1% All Channels  
• Signal to Noise Ratio: Greater than 90 db  
• Bass Boost (Mega Bass ô): 0 or +6 db  
• Adjustable Crossover Freq.: 30 Hz to 180 Hz  
• Output Impedance: 4 Ohm Recommended  
• Bridgeable? : Yes (4 Ohm Impedance Minimum)  
• Fuse: 1 X 25 Amp Automotive Blade Type  
4. Install a 30 amp fuse or 30 amp circuit breaker in the 8 gauge power wire as close to the battery as practical.  
5. Then route the 8 gauge power wire from the 30 amp fuse or circuit breaker to the rear of the amplifier.  
6. Strip 1/2" width of insulation from the end of the 8 gauge power wire.  
Connect the fused 12 volt DC power wire, chassis ground cable, and remote wires. (SEE SECTION 3, ELECTRICAL CONNECTIONS)  
Turn on the amplifier, if the Power Protection light is green, turn off the amplifier and proceed to the next section. If  
the Power Protection light is red, review the all of the connections and wires, you may have loose connections, a  
bad chassis ground, or inadequate size power wire. After reviewing all the connections and wires, and the problem  
persist, call our toll free help line for assistance.  
7. Attach a spade lug on the end of 8 Ga. wire.  
7. Loosen screw to open POWER connector plates on rear of amplifier.  
• Dimensions: 2î H X 10.25î W X 11.5î D  
8. Insert the spade lug between between the connector plates. Turn screw until power cable is tight.  
2. Remote Terminal  
Allow for air to circulate around the amplifier. Do not mount inverted or upside down. Do not cover with  
carpeting or enclose it behind interior panels. Avoid mounting under a seat.  
The REMOTE wire connection automatically turns on your amplifier when your stereo is turned on.  
On most stereos, this wire is marked as the REMOTE, ACCESSORY, or POWER ANTENNA.  
1. Locate the REMOTE, ACCESSORY, or POWER ANTENNA on the stereo. (Refer to your stereo's owner's manual.)  
2. Splice REMOTE, Accessory or Power Antenna wire from rear of the stereo to a length of wire that will  
reach the rear of the amplifier  
• 4 Mounting Screws  
• 25 Amp Fuse  
• 1 Ground Wire  
3. Loosen screw and open REMOTE connector plates on rear of amplifier.  
4. Insert wire end between the REMOTE connector plates.  
5. Tighten screw closing REMOTE connector plates on wire.  
• 4 Flat Washers  
• Spade Terminal  
• 1 Self Tapping Screw  
GIVE US A CALL, WE'LL HELP YOU INSTALL.  
PLEASE DO NOT RETURN PRODUCT TO STORE.  
Visit us on the WEB  
3. Ground Terminal  
1. The ground connection cable should be attached to clean, unpainted chassis metal for a good electrical connection.  
2. Find good, non rusted chassis metal, as close to the amplifier as possible.  
3. Drill a pilot hole with a 1/16" drill bit.  
For Information and Technical Assistance,  
Call Toll-Free in U.S.A. and Canada.  
Front  
Front Channel  
3 Way Crossover  
Switch  
FRONT OF UNIT  
X-OVER  
1-800-445-1797  
Front  
GAIN  
Adjustment  
Front Channel  
Stereo/Bridge  
Switch  
Adjustment  
Front Channel  
Bass Boost  
Water Damage: Do not install this amplifier in a location that will expose it to water or moisture.  
Dust or Dirt: Do not install this amplifier in a location that will expose it to dusty or dirty conditions.  
Modifications: Do not open the amplifier for any reason, or modify the amplifier in any way. If  
modified in any way a fire hazard or malfunction may occur. Modification will void the warranty.  
4. Use sandpaper to expose an area of bare metal around the pilot hole.  
5. Tightly fasten the provided ground cable with the self tapping sheet metal screw to the chassis metal.  
A loose ground will cause distortion and popping noises in the speakers  
2.  
You may purchase shielded RCA cables that have a remote wire that is built right into the cable.  
This type of cable makes it possible to route both RCA cable and remote wire at the same time.  
Front Channel  
"RCA" Inputs  
Rear Channel  
Bass Boost  
Rear  
Rear Channel  
Stereo/Bridge  
Switch  
X-OVER  
Adjustment  
Rear  
Rear Channel  
"RCA" Inputs  
Rear Channel  
3 Way Crossover  
Switch  
GAIN  
Adjustment  
Recommended Method For Attaching Wires to Terminals  
With a hammer and nail set/center punch,  
Mark the holes for the 4 mounting screws in  
the 4 mounting brackets with a marker/pen.  
make dimple marks on the mounting  
surface for each mounting screw.  
1. POWER WIRE  
When connecting the power wire place  
the spade terminal under the contact plate, and  
the forks around the screw, then tighten the screw.  
Terminals for Front Speakers  
(Left & Right)  
REAR OF UNIT  
25 Amp Fuse  
2. REMOTE WIRE  
To connect the remote wire place the  
twisted end under the contact plate and tighten screw.  
4.  
3.  
3. GROUND WIRE  
To connect the supplied ground wire, remove the  
screw and contact from the ground terminal on  
the rear of the amplifier. Put the screw through the  
contact plate then through the ground wire, then  
Drill 4 pilot holes with electric drill and 1/16" bit,  
make sure there is nothing behind mounting surface  
that can be damaged when drilling the holes.  
(Safety glasses should be worn at this time.)  
Secure amplifier with included screws and  
washers using Phillips screwdriver.  
tighten the screw.  
Terminals for  
12 Volt DC Power,  
Remote Switch,  
3. GROUND WIRE  
Terminals for Rear Speakers  
(Left & Right)  
When mounting the amplifier, make sure there is enough room for access to make  
adjustments to the switches and adjustment screws.  
2. REMOTE WIRE  
1. POWER WIRE  
and Chassis Ground  
 

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