Limited warranty, Bass boost, Gain control – Roadmaster Block Subwoofer Amplifier VRA1.0 User Manual

Page 5: Frequency adjustment screw

Advertising

FRONT OF AMPLIFIER

Left Channel

Right Channel

LEFT CHANNEL

RIGHT CHANNEL

Shielded RCA Cable

Speaker

Antenna wires

FIGURE 1.

Generic Car Stereo

OFF ON

BASS BOOST

(optional)

BASS BOOST

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.

VIRTUAL REALITY SOUND LABS

products are designed and manufactured to provide a high level of trouble-free performance. VIRTUAL REALITY SOUND

LABS

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 LABS

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 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 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 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, 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 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 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.

Limited Warranty

1-800-445-1797

PLEASE DO NOT RETURN PRODUCT TO STORE.

visit us on the WEB

WWW.VR-3.COM

For Information and Technical Assistance,

Call Toll-Free in U.S.A. and Canada.

The pre-amp line outputs allow
unamplified signals to pass
through the amplifier to be used
in a multiple amplifier stereo
system.

Do not splice RCA jacks directly to
the car stereo's speaker wires.

High Level to Low Level Input Adaptor

Not Included

Unused Speaker Wires from Head Unit

RCA "Y" Adaptors

Not Included

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.

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)

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.

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.

One Single Voice Coil Subwoofer

Two Single Voice Coil Subwoofers

One Dual Voice Coil 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.

To wire a dual voice coil subwoofer connect the
amplifier’s positive (

) terminal to the positive (+)

terminal of 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”.

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”.

DO NOT WIRE 2 SUBWOOFERS IN PARALELL!

MIN MAX

GAIN

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,

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.

Frequency Adjustment Screw

50Hz 250Hz

FREQ

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.
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.

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.

4 Ohms + 4 Ohms = 8 Ohms

This Is The Only Safe Way To Connect
Two 4 Ohm Subwoofers To The VRA1.0 Amplifier

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.

4 OHM SUBWOOFER

Subwoofer "A"

Subwoofer "B"

Voice Coil "A"

Voice Coil "B"

. All designs, logos and images are the exclusive property of Virtual Reality Sound Labs

Advertising

Popular Brands

Popular manuals