TM
Virtual Reality Sound Labs
SERIOUS SOUND
Dear Customer,
CONGRATULATIONS. The VRA1.0 Mono Block Subwoofer 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
VRA1.0 Mono Block Subwoofer Amplifier contains a damaged or missing item, does not perform as specified,
requires warranty service or you have an 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, 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.
• 300 Watts Total Peak Power
• Input Sensitivity: 250 mV to 6 Volts
• 300 Watts Peak into 4 Ohm@ <1.0% THD +/- 5%
• 150 Watts RMS into 4 Ohm @ <1.0% THD +/- 5%
• Measured at 14.4 VDC Input Voltage
• Frequency Response: 20 Hz to 300 Hz +/- 3 db
• THD: Less than 1%
• Signal to Noise Ratio: Greater than 95 db
• Bass Boost (Mega Bass ): 0 or +6 db
• Adjustable Crossover Freq.: 50 Hz to 250 Hz
• Output Impedance: 4 Ohm Recommended
• Fuse: 30 Amp Automotive Blade Type
TM
• Dimensions: 2” H X 10.25” W X 9.25” D
• Dimensions: 5.08cm H x 26.04cm W x 23.5cm D
• 1 Ground Wire
• 4 Mounting Screws
• 30 Amp Fuse
• 1 Self Tapping Screw
• 12 Wire Nuts
• 4 Flat Washers
• Spade Terminal
• Crossover Frequency Adjustment (Freq.)
• Gain Adjustment (GAIN)
FRONT OF UNIT
INPUT
LINE OUT
FREQ
GAIN
LEFT
BASS BOOST
20Hz 300Hz
MIN MAX
RIGHT
OFF ON
• “RCA” Outputs To Be
Used With Multiple Amps
• “RCA” Inputs
• Bass Boost
REAR OF UNIT
• 30 Amp Fuse
4 OHM SUB WOOFER
FUSE
MOSFET POWER SUPPLY
POWER REMOTE GROUND
POWER
PROTECTION
30 AMP
• Terminals for
One 4 OHM Subwoofer
• Terminals for
12 Volt DC Power,
Remote Switch,
• Power,
Protection/Connection
Indicator Light
And Chassis Ground
FOR USE WITH 4 to 8 OHM SUBWOOFERS ONLY!
Read the following wiring instructions very carefully. If you have 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.
Recommended Method For Splicing Wires
#1
#2
#3
Twist together and bend as shown.
Strip 1/2" of insulation from the ends of the wires..
Wrap with electrical tape.
1. Power Terminal
1. DISCONNECT THE VEHICLE’S NEGATIVE (-) BATTERY TERMINAL FROM THE NEGATIVE BATTERY POST.
2. Strip ½" 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 manufacturer's installation instructions.
After Market Positive Terminal (+)
To Amplifier Power Terminal
Vehicle's Positive (+)
12 Volt power cable
In-line 35 amp Fuse or Circuit Breaker
(not included)
3. Install a 35 amp fuse or 35 amp circuit breaker in the 8 gauge power wire as close to the battery as practical.
4. Then route the 8 gauge power wire from the 30 amp fuse or circuit breaker to the rear of the amplifier.
5. Strip 1/2" width of insulation from the end of the 8 gauge power wire.
6. Attach a spade lug on the end of 8 Gauge 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 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.
4. Use sandpaper to expose an area of bare metal around the pilot hole about the size of a dime.
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.
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, and finally
tighten the screw.
3. GROUND WIRE
2. REMOTE WIRE
1. POWER WIRE
©2005 Virtual Reality Sound LabsTM All designs, logos and images are the exclusive property of Virtual Reality Sound LabsTM and/or its affiliates. Design Patent Pending. All rights reserved. 050505
.
The line inputs on the front of the amplifier receive low level, high impedance signals from the low level RCA
outputs of 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 car stereo,
in order to use all of the speaker outputs.
FIGURE 1.
Speaker
&
Antenna wires
Generic Car Stereo
Left Channel
Right Channel
Shielded RCA Cable
The pre-amp line outputs allow
unamplified signals to pass
through the amplifier to be used
in
a
multiple amplifier stereo
system.
LEFT CHANNEL
RIGHT CHANNEL
FRONT OF AMPLIFIER
RCA "Y" Adaptors Not Included
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)
Shielded RCA Cable Not Included
For best sound performance use Shielded RCA Cables
to connect the Line Outputs from your stereo to the
Amplifier Line Inputs. Shielded RCA Cables prevent
electrical interference from the vehicles electrical
system, and also radio frequency interference.
High Level to Low Level Input Adaptor Not Included
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.
Do not splice RCA jacks directly to
the car stereo's speaker wires.
Unused Speaker Wires from Head Unit
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.
You must trim the unused speaker wires on the stereo and
wrap with electrical tape as shown to prevent a short circuit.
GAIN Control
The GAIN control matches the line output of your car stereo's RCA jacks, to the line inputs of
GAIN
the amplifier. When you have completed installing the amplifier, the gain control must be set at
no more than half way to prevent damage to the amplifier. 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 set the left & right balance and front & rear fader settings are set in the
middle. If you have any distortion at these setting, then turn the gain down until the distortion
disappears.
MIN MAX
Frequency Adjustment Screw
The frequency adjustment screw (FREQ.) only has an effect if the crossover switch is set to
"BASS" or "TREBLE", when the crossover is set to FLAT it has no effect.
FREQ
To set the FREQ. turn FREQ. all the way to the right, this allows a range of sound from 50 Hz -
250 Hz to the subwoofer. As you turn the FREQ. to the left (counterclockwise), you will be
cutting off the high frequencies coming from the subwoofer.
50Hz 250Hz
BASS BOOST
The BASS BOOST switch adds an additional 6dB at 50Hz. It normally is set to OFF. Turning
ON BASS BOOST, will not make the bass sound better, it only adds volume to the lowest
frequency. Bass Boost should not be turned on if you have Bass Control or Loudness on your
stereo head unit.
OFF ON
BASS BOOST
(optional)
One Single Voice Coil Subwoofer
4
OHM SUBWOOFER
To wire a 4 ohm single voice coil subwoofer to
the amplifier, connect the amplifier’s positive (+)
terminal to the subwoofer’s positive (+) terminal.
Then connect the amplifier’s negative (-)
terminal to the subwoofer’s negative (-) terminal.
DO NOT WIRE 2 SUBWOOFERS IN PARALELL!
Two Single Voice Coil Subwoofers
4
OHM SUBWOOFER
To wire two single voice coil 4 ohm subwoofers in series
connect the amplifier’s positive (+) terminal to the
positive (+) terminal of subwoofer “A”.
Next connect the negative (-) terminal of subwoofer “A”
to the positive (+) terminal of subwoofer “B”.
Then connect the negative (-) terminal of the amplifier
to the negative terminal of subwoofer “B”.
Subwoofer "A"
Subwoofer "B"
This Is The Only Safe Way To Connect
Two 4 Ohm Subwoofers To The VRA1.0 Amplifier
4 Ohms + 4 Ohms = 8 Ohms
One Dual Voice Coil Subwoofer
To wire a dual voice coil subwoofer connect the
amplifier’s positive (+) terminal to the positive (+)
terminal of voice coil “A”.
Voice Coil "A"
Next connect the negative terminal of voice coil
“A” to the postive (+) terminal of voice coil “B”.
Then connect the negative (-) terminal of the
amplifier to the negative (-) terminal voice coil
“B”.
Voice Coil "B"
What is the per channel RMS power of this amplifier?
150 Watts RMS into 4 Ohm @ <1.0% THD +/- 5%
Can I hook up two subwoofers to this amplifier?
Only if both subwoofers are wired in series.
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.
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 VRPC1000 Power Capacitor is the perfect companion to the VRA2.0 Amplifier.
Why does the Power / Protect LED switch between green & red?
Check your POWER and GROUND connections. Also check to see that your wire size is sufficient to
carry the current demand. Check for improper impedance loads
Why does the Power / Protect LED stay red?
This typically indicates that one or more of the MOSFET output transistors has shorted.
This condition will not fix itself. The amplifier must be returned to Virtual Reality Sound Labs for repair.
Why don’t I have any sound when the protection light is green?
Check the controls on the stereo, make sure that the volume, balance, and fader controls are set properly.
Also check or replace the RCA cables. They may be defective.
For Information and Technical Assistance,
Call Toll-Free in U.S.A. and Canada.
1-800-445-1797
PLEASE DO NOT RETURN PRODUCT TO STORE.
visit us on the WEB
WWW.VR-3.COM
Limited Warranty
VIRTUAL REALITY SOUND LABSTM products are designed and manufactured to provide a high level of trouble-free performance. VIRTUAL REALITY SOUND
LABSTM warrants, to the original purchaser, that its products are free from defects in material and workmanship for 30 days from the date of original purchase,
as part of our commitment to product excellence. VIRTUAL REALITY SOUND LABSTM and/or it’s affiliates routinely improves 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 LABSTM 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 LABSTM and/or it’s 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 LABSTM 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 LABSTM will not be responsible for any charge incurred for installation.
OWNER'S RESPONSIBILITIES:
VIRTUAL REALITY SOUND LABSTM 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 LABSTM, Service Department, 6 G Industrial Way West, Eatontown, New Jersey 07724.
3. Please include a detailed explanation of the problem you are having.
4. If your product is found by VIRTUAL REALITY SOUND LABS to have a defect in material or workmanship, within the warranty period, it will be repaired or
replaced at no charge and returned to you prepaid. Where permitted by Iaw VIRTUAL REALITY SOUND LABSTM liability shall be limited to that set forth in this
warranty. This warranty shall be the exclusive remedy of the purchaser.
VIRTUAL REALITY SOUND LABSTM makes no other warranty of any kind, expressed or implied; and all implied warranties, are hereby disclaimed by
VIRTUAL REALITY SOUND LABSTM and excluded from this warranty, VIRTUAL REALITY SOUND LABSTM and/or it’s 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.
©2005 Virtual Reality Sound LabsTM All designs, logos and images are the exclusive property of Virtual Reality Sound LabsTM and/or its affiliates. Design Patent Pending. All rights reserved. 050505 Printed in China 00000
.
|