Roadmaster Four Channel Amplifier Vra4 0 Users Manual
VRA4.0 to the manual c076d9e3-df1e-409b-94c7-36ac8e024404
2015-02-06
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VRA4.0D
Four Channel
Digital Amplifier
Virtual Reality Sound Labs
SERIOUS SOUND
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.
Tools Needed For Installation:
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 customerservice@vr-3.com 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.
• 400 Watts Total Peak Power
• 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
• Dimensions: 2î H X 10.25î W X 11.5î D
• Input Sensitivity: 250 mv to 6 Volts
• 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
• Nail Set/Center Punch
• Phillips Screwdriver
• 4 Mounting Screws
• 1 Self Tapping Screw
• 4 Flat Washers
• Safety Glasses
• Marker/Pen
Strip 1/2" of insulation from the ends of the wires..
We recommend an Amplifier Installation Kit containing the following parts:
• 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
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.
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.
• 25 Amp Fuse
GIVE US A CALL, WE'LL HELP YOU INSTALL.
• Spade Terminal
www.vr-3.com
Front
X-OVER
Front Adjustment
GAIN
Adjustment
For Information and Technical Assistance,
Call Toll-Free in U.S.A. and Canada.
Front Channel
3 Way Crossover
Switch
Front Channel
Bass Boost
Rear
Rear Channel
X-OVER
Stereo / Bridge
Adjustment
Switch
Rear
Rear Channel
GAIN
"RCA" Inputs
Adjustment
2.
Rear Channel
Bass Boost
Rear Channel
3 Way Crossover
Switch
With a hammer and nail set/center punch,
make dimple marks on the mounting
surface for each mounting screw.
Mark the holes for the 4 mounting screws in
the 4 mounting brackets with a marker/pen.
Terminals for Front Speakers
(Left & Right)
25 Amp Fuse
4.
3.
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.
Terminals for
12 Volt DC Power,
Remote Switch,
and Chassis Ground
Terminals for Rear Speakers
(Left & Right)
Wrap with electrical tape.
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
after-market positive battery terminal according to the maunfacturer's installation instructions.
After Market Positive Terminal (+)
To Amplifier Power Terminal
In-line 30 amp Fuse or Circuit Breaker
(not included)
Vehicle's Positive(+)
12 volt power cable
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.
7. Attach a spade lug on the end of 8 Ga. wire.
7. Loosen screw to open POWER connector plates on rear of amplifier.
8. Insert the spade lug between between the connector plates. Turn screw until power cable is tight.
2. Remote Terminal
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
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.
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.
(Safety glasses should be worn at this time.)
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
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.
Recommended Method For Attaching Wires to Terminals
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.
2. REMOTE WIRE
To connect the remote wire place the
twisted end under the contact plate and tighten screw.
25
REAR OF UNIT
Twist together and bend as shown.
1-800-445-1797
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.
Front Channel
"RCA" Inputs
#3
1. Power Terminal
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.
Visit us on the WEB
Front Channel
Stereo / Bridge
Switch
#2
• Electrical Tape
• Electric Drill with 1/16" bit
PLEASE DO NOT RETURN PRODUCT TO STORE.
FRONT OF UNIT
Recommended Method For Splicing Wires
#1
• Hammer
• Wire Cutter
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.
• 1 Ground Wire
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.
Secure amplifier with included screws and
washers using Phillips screwdriver.
When mounting the amplifier, make sure there is enough room for access to make
adjustments to the switches and adjustment screws.
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
tighten the screw.
3. GROUND WIRE
2. REMOTE WIRE
1. POWER WIRE
The line inputs on the front of the amplifier receive low level, high impedance signals from the low level RCA
outputs on the car stereo. The amplifier receives the signals and converts them to high level, low impedance
signals to be used to drive the speakers. All of the amplifiers line inputs need to be connected to the to car stereo,
in order to use all of the speaker outputs, or to bridge the outputs. If you plug left and right line inputs into the front
channel, Only the front left and right speaker terminals will have power to output, the other speaker terminals will
not.
FIGURE 2.
FIGURE 1.
4 CHANNELS INTO 4 CHANNELS
2 CHANNELS INTO 4 CHANNELS
Speaker
&
Antenna wires
LINE OUTPUTS
LINE OUTPUTS
LINE OUTPUTS
Speaker
&
Antenna wires
The VRA 4.0 amplifier is capable of driving different speaker configurations by using different combinations of settings.
The 3 Way CROSSOVER permits you to customize the amplifier to power a sub woofer (HPF),
a pair of full range speakers (FULL), or a pair of satellite tweeters like the RoadmasterUSA RT-15 (LPF).
What is the per channel RMS power of this amplifier?
50 Watts RMS per channel times two channels. Consult the specifications in the installation manual.
The FREQ control only works when the crossover switch is set to HPF or LPF, when crossover is set to FULL
it has no effect at all.(see Speaker Wiring & Options for more settings)
What is a 3 Way Electronic Crossover?
A 3 Way Electronic Crossover divides the audio signal into two parts, this permits you to customize the amplifier
to power a subwoofer (LPF), or a pair of satellite tweeters like the RoadmasterUSA RT-15 (HPF).
When the switch is set to (FULL) the full audio signal will power a pair of full range speakers.
The HPF BOOST switch adds a additional 6dB at 50Hz. It normally is set to off. Turning on HPF BOOST, will not
make the bass sound better, it only adds volume to the lowest frequency.
Why do I hear a clicking sound?
Digital amplifiers make a clicking sound when driven into distortion. Turn down the Gain control.
Can I wire a bridged subwoofer ("Bridge" two channels)?
Yes you can connect a subwoofer by bridging the two channels, see Speaker Wiring and Options.
Four Full Range Speakers
Right Channel
Left Channel
FRONT CHANNEL
Left & Right Speakers
Stereo
REAR CHANNEL
Left & Right Speakers
Front Channel Settings
Shielded RCA Cable
HPF FULL LPF
Shielded RCA Cables
Connect 4 full range
speakers to the amplifier, 2 to the
front channel, and 2 to the back channel.
set both the front and rear crossover
switches to FULL.
CROSSOVER
RIGHT CHANNEL
FRONT CHANNEL
REAR CHANNEL
BASS BOOST
Bridge
Front Channel Settings
HPF FULL LPF
RCA "Y" Adaptors
What should I do if my car radio doesn't have a remote wire?
Connect the amplifier remote terminal to a switched 12 volt circuit controlled by the ignition switch. This will turn
the amplifier off when the ignition switch is turned off.
Do I need a stiffening capacitor with this amplifier?
It never hurts to have extra reserve power when operating an amplifier of this caliber.
The FULL setting allows the full
range of sound to the speakers.
Right Front
Left Front
0 - +12db
(adjustable)
Stereo
LEFT CHANNEL
What if my car radio doesn't have RCA line outputs?
You will need a converter used to change the signals from the speaker wires to RCA line level inputs. Follow
the converter manufacturer's installation instructions.
Bridge
Why does the Protect LED stay red?
Suspect the power and ground connections, insufficient wire size to carry the current demand,
or improper speaker wiring. Check all wiring connections.
0 - +12db
CROSSOVER
BASS BOOST
(adjustable)
Left Rear Right Rear
Left Front
LINE INPUTS ON
THE FRONT OF AMPLIFIER
Right Front Left Rear
Right Rear
LINE INPUTS ON
THE FRONT OF AMPLIFIER
LINE INPUTS
LEFT
LEFT
RIGHT
FRONT
RIGHT
REAR
FRONT
Your car stereo may only has 2 line outputs (left & right),
RCA "Y" Adaptors will be needed to split the left and right
signals into 2 right channels and 2 left channels, one of
each channel for both the front and rear inputs.(See Fig.1)
For best sound performance use Shielded RCA Cables to
connect the Line Outputs from your stereo to ALL FOUR
(4) Amplifier Line Inputs. Shielded RCA Cables prevent
electrical inteference from the vehicles electrical system,
and also radio frequency interference.
If your stereo does not have RCA type output jacks, a
high level to low level adaptor will need to be purchased.
The high level to low level adaptor takes the signals from
the car stereo's speaker wires and converts them to low
level, high impedance signals to be used by the amplifier.
Install the converter according to the manufacturers'
instructions.
REAR
RCA "Y" Adaptors
Not Included
Shielded RCA Cable
Not Included
Stereo
To set the FREQ. when the crossover is set
to LPF, turn FREQ. all the way to the
left(counter clockwise) this will allow the
full range of sound to the front speakers.
As you turn the FREQ. to the
right(clockwise), you will be cutting off the
low frequencies coming from the front speakers.
Adjust to your liking.
The rear crossover will be set
to HPF. See Two Bridged Sub Woofers below
for FREQ. adjustments for HPF crossover.
Bridge
Front Channel Settings
HPF FULL LPF
BASS BOOST
or
Not Included
The colors of the jacks on the RCA cables and adaptors shown here are for illustration purposes.
The color of the cables and adaptors that you purchase for installation will vary by manufacturer.
Gain Control
The GAIN control matches the line output of your car stereo's RCA jacks, to the line inputs
of the amplifier. When you have completed installing the amplifier, turn the gain control to
about 1/2 way(recommended). If you have any distortion at this setting, Play a CD or cassette
on the car stereo, set the bass and treble at 50%, and set the equalizer, if you have one, to flat
across all frequencies. Also make sure the left & right balance and front & rear fader settings are
set in the middle.
Connect 2 sub woofers, one to the
front chancel and one to the rear channel.
Set both crossover switches to HPF,
this will allow only the bass sounds
to the sub woofer.
To set the FREQ. when the crossover is
set to HPF, turn FREQ. all the way to
the right, this will allow the full range
of sound to the sub woofer.
As you turn the FREQ. to the
left(counter clockwise), you
will be cutting the high frequencies
coming from the speaker.
Adjust to your liking.
PLEASE DO NOT RETURN PRODUCT TO STORE.
(adjustable)
Visit us on the WEB
www.vr-3.com
HPF FULL LPF
For Information and Technical Assistance,
Call Toll-Free in U.S.A. and Canada.
CROSSOVER
For tweeter/satellite
(not recommended)
Stereo
1-800-445-1797
Bridge
Rear Channel Settings
HPF FULL LPF
0 - +12db
CROSSOVER
BASS BOOST
(adjustable)
Set GAIN Higher
When Bridged
Bridge
Front Channel Settings
High Level to Low Level Input Adaptor
GIVE US A CALL, WE'LL HELP YOU INSTALL.
0 - +12db
CROSSOVER
Stereo
You must trim the unused speaker wires on the stereo
and wrap with electrical tape as shown to prevent a short circuit.
MIN MAX
Connect 2 full range or satellite
speakers to the front channel, and
a sub woofer to the rear channel
of the amplifier. Set the front crossover
switch to FULL, this allows the full
range of sound to the front speakers.
Two Bridged Sub Woofers
Do not splice RCA jacks directly to
the car stereo's speaker wires.
GAIN
Two Full Range Speakers and a Bridged Sub woofer
LINE INPUTS
0 - +12db
HPF FULL LPF
BASS BOOST
CROSSOVER
(adjustable)
Set GAIN Higher
When Bridged
Stereo
Bridge
Rear Channel Settings
HPF FULL LPF
CROSSOVER
®
VIRTUAL REALITY SOUND
LABS products are designed and manufactured to provide a high level of trouble-free performance. VIRTUAL
®
for 30
REALITY SOUND LABS warrants, to the original purchaser, that its products are free from defects in material and workmanship
®
days from the date of original purchase. As part of our commitment to product excellence, VIRTUAL REALITY SOUND LABS and/or its
affiliates routinely improve the designs, materials or production methods of its existing products. Because it is impractical to publicize all
changes in every product, we reserve the right to make such changes without notice.
CONDITIONS OF WARRANTY:
®
If during the 30 day warranty period your new product is found to be defective, VIRTUAL REALITY SOUND LABS will repair such defect,
or replace the product, without charge for parts or labor subject to the® following conditions:
1. All repairs must be performed by VIRTUAL REALITY SOUND LABS and/or its affiliates in Eatontown, New Jersey.
2. The equipment must not have been altered or been damaged through negligence, accident, or improper operation.
3. The replacement of parts are exempted from this warranty when replacement is necessary due to normal wear and tear.
4. All warranty claims must be accompanied by a copy of the sales receipt or bill® of sale.
5. Repair or replacement parts supplied by VIRTUAL REALITY SOUND LABS under this warranty are protected only for the unexpired
portion of the original warranty.
6. In the case of car stereos, this warranty does not extend to the elimination of car static or motor noise; correction of antenna problems;
costs incurred for the removal or reinstallation
of the product; damage to tapes, speakers, accessories or car electrical systems.
®
7. VIRTUAL REALITY SOUND LABS will not be responsible for any charge incurred for installation.
OWNER’S RESPONSIBILITIES: ®
VIRTUAL REALITY SOUND LABS will make every effort to provide warranty service within a reasonable period of time.
SHOULD YOU HAVE ANY QUESTIONS ABOUT SERVICE RECEIVED, OR IF YOU WOULD LIKE ASSISTANCE IN OBTAINING SERVICE,
PLEASE CALL TOLL FREE 1-800-445-1797, 8:30am - 4:30pm EST.
In order to provide you with the proper warranty service, we request that you adhere to the following procedure:
1. Include a copy of your sales receipt or bill of sale with your unit when it is returned for warranty service.
2. If it is necessary to return your product for service, please return it securely packed, preferably in the original shipping carton, and freight
and insurance prepaid to the following address: VIRTUAL REALITY SOUND LABS, Service Department, 41 James Way, Eatontown, New
Jersey 07724.
3. Please include a detailed explanation of the problem you are ®having.
it
4. If your product is found by VIRTUAL REALITY SOUND LABS to have a defect in material or workmanship, within the warranty period,
®
will be repaired or replaced at no charge and returned to you prepaid. Where permitted by Iaw VIRTUAL REALITY SOUND LABS liability
shall be limited to that set forth in this warranty. This warranty shall be the exclusive remedy of the purchaser.
VIRTUAL REALITY SOUND LABS® makes no other
warranty of any kind, expressed or implied; and all implied warranties,
are hereby
®
®
disclaimed by VIRTUAL REALITY SOUND LABS and excluded from this warranty, VIRTUAL REALITY SOUND LABS and/or its affiliates,
the manufacturer, distributor and seller shall not be liable for any injury, loss or damage, incidental or consequential, arising out of the use
or intended use of the product.
0 - +12db
BASS BOOST
(adjustable)
Set GAIN Higher
When Bridged
©2004 Virtual Reality Sound Labs. All rights reserved. All designs, logos and images are the exclusive property of Virtual Reality Sound Labs. US and
Foreign Intellectual Property Rights Pending. 072108 Printed In China
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