Cerwin-vega Hed series User manual

H7100.2/H7900.4/H71200.1D

H71800.1D/H72400.1D/H71200.5D

H7100.2/H7900.4/H71200.1D

H71800.1D/H72400.1D/H71200.5D

HED 7SERIES

AMPLIFIERS

HED 7SERIES

AMPLIFIERS

Cerwin Vega Mobile Ampliﬁers

Thank you for purchasing a Cerwin Vega Mobile ampliﬁer for your car

audio system. You have chosen Cerwin Vega Mobile because you deserve

the best!

Cerwin Vega Mobile ampliﬁers are designed and engineered to the highest

quality standards in the industry to create the ultimate listening experience

in your vehicle. For optimal performance of this product, it is highly

recommended that you have your new ampliﬁer installed by an authorized

Cerwin Vega Mobile dealer. Our authorized dealers have the necessary

experience and installation equipment to ensure that your ampliﬁer will

deliver maximum performance and explain all the details pertaining to our

warranty coverage as well.

If you decide to install the ampliﬁer by yourself, please thoroughly read

through this manual before getting started. This manual will help

familiarize yourself with this ampliﬁer and guide you through the

installation process and procedures.

Please contact your local authorized Cerwin Vega Mobile dealer if you

have any questions regarding the instructions in this manual or the

ampliﬁer’s operation capabilities. If you require additional assistance,

please contact the Cerwin Vega Mobile Technical Support Department

during business hours at

213-261-4161

Installation

WARNING:

Prolonged exposure to sound pressure levels in excess of 100dB can cause permanent hearing loss.

Cerwin Vega Mobile ampliﬁers can exceed that level so please exercise restraint when listening and enjoying your new ampliﬁer.

GENERAL PRECAUTIONS

• This unit is designed for negative ground 12V DC operation only. (some older english vehicles have a positive ground!)

• Total system impedance must not be less than 2 ohms, in a bridged OR stereo conﬁguration (monoblocks are 1 ohm stable)

• Avoid installing the unit where:

- It would be subject to high temperatures, such as from direct sunlight or hot air from the heater.

- It would be exposed to rain or moisture.

- It would be subject to dust or dirt.

• Do not cover the ampliﬁer with carpet or wires.

• Do not use the ampliﬁer with a weak car battery. Optimum performance depends on a normal battery supply voltage.

• For safety reasons, keep the volume of your car audio system moderate while driving your vehicle so that you can still hear

normal trafﬁc sounds and emergency vehicles outside your car.

MOUNTING PRECAUTIONS

Although Cerwin Vega Mobile ampliﬁers incorporate heat sinks and protection circuits, mounting the ampliﬁer in a tight space

without any air movement can still damage internal circuitry over time. Choose a location that provides adequate ventilation

around the ampliﬁer. For easy system set-up, mount the ampliﬁer so the side panel controls will be accessible after

installation. To increase thermal run times on low impedance loads, an additional fan is recommended, remember any moving

air across the ampliﬁer will reduce heat. In addition, observe the following precautions:

1. Using a felt pen mark, mark the mounting hole locations.

2. Mounting the ampliﬁer on carpet will signiﬁcantly reduce air ﬂow, resulting in reduced thermal run times.

3. Mount the ampliﬁer on a solid surface. Avoid mounting to sub woofer enclosures or areas prone to vibration. Do not install

the ampliﬁer on plastic or other combustible materials.

4. Prior to mounting the ampliﬁer, make sure not to cut or drill into the fuel tank, fuel lines, brake lines (under chassis) or

electrical wiring.

WIRING PRECAUTIONS

1. Before installation, make sure the source unit power switch is in the OFF position.

2. Disconnect the negative (-) lead of the battery before making any power connections.

3. When making connections, be sure that each one is clean and secure. Insulate all of your connections. Failure to do so

may damage your equipment.

4. A secure clean ground connection is critical to the performance of your ampliﬁer. Connect the ground directly to the car

chassis to minimize resistance and avoid any noise problems.

5. Add an external fuse on the ampliﬁer’s positive (+) power lead and connect it as close as possible to the vehicle’s (+)

battery terminal. 18 inches is the usual dimension. Use a rating that equals the total current consumption at full output

of all ampliﬁers in the system. This external fuse will protect the vehicle from short circuits that can cause a ﬁre.

Installation

Placing the x-over switch in the FULL position (H71000.2/H7900.4/H71200.5D) sets the ampliﬁer to Full Range. This

setting allows ALL frequencies to pass to the speakers. Placing the switch in the HPF or LPF position activates the crossover.

(LPF only on H71200.1D/71800.1D/72400.1D, and it is always ON).

Placing the switch in the HPF position sets the ampliﬁer to the High Pass Filter mode, enabling frequencies above the cutoff

point to pass. For a Co-axial or Component speaker system begin tuning with the frequency set between 60Hz and 80Hz.

Placing the switch in the LPF position sets the ampliﬁer to the Low Pass Filter mode, enabling frequencies below the cutoff

point to pass. For a subwoofer system begin tuning with the frequency set between 80Hz and 120Hz.

To adjust the gain setting, turn the ampliﬁer gains all the way down (counterclockwise). If using a remote level control

(H71200.1D/71800.1D/72400.1D/71200.5D) plug the remote level control into the ampliﬁer and turn it to about

1/2 way up. Next turn the source unit volume up to almost full volume (usually about 2/3rds of the way up) or until

the output starts to distort on an oscilloscope. This will be NEARLY full volume on most source units, perhaps one or two

“clicks” down from maximum volume. Next, increase the ampliﬁer gain setting until adequate volume is achieved, or

until distortion is audible and then turn it down a bit until the distortion is inaudible.

NOTE:

Ideal signal to noise and dynamic range are achieved with the gain at minimum. Most users ﬁnd adequate gain and volume

is achieved at less than halfway in the adjustment range. Avoid setting the ampliﬁer gain very high as noise and distortion will

increase signiﬁcantly. For a more in depth level setting (gain adjustment) procedure AND system designs, visit the CVM website.

The HPF or LPF crossover adjustment can now be ﬁne tuned. If you are using the ampliﬁer in a HPF conﬁguration and would like

the system to be a little bit louder you can increse the HP Filter frequency and reset the “Gain” of the ampliﬁer. Raising the HPF

frequency up too high, however will cause a loss of mid range and bass. If you are using the ampliﬁer in a HPF ﬁlter conﬁguration

and you hear voice or vocals coming from your subwoofer system you can turn the LPF Filter frequency down (lower).

After setting the input gain adjustment and crossover, you may choose to add a small amount of “Vega Bass Boost” in the low

frequency region. Remember that the Bass Boost feature will not ﬁx a poorly designed subwoofer enclosure or subwoofers

that didn’t sound good to begin with.

1. Make sure any bass EQ, loudness or low frequency equalization from the source unit is set to OFF or FLAT.

2. While playing the same musical selections used during the gain setting process, slowly increase the level of the Bass Boost.

You should be able to notice a obvious change between 0 and +12dB. If you do not notice much difference, then it will not

serve any beneﬁt to increase the boost further.

3. If the boost has audible beneﬁts without adding appreciable distortion, ﬁnd a level that suits your taste. Remember: it’s

much easier to construct the right subwoofer enclosure for your listening preferences than relying on a bass boost control to

do the job!

4. VARIABLE PHASE (MonoBlocks): This control helps solve issues with phyiscal placement of the subwoofer in relationship to

you the driver. It is simple to use, have a friend adjust this control while playing music with bass until it sounds the best

and the most forward in the vehicle, WHILE you are in the drivers sit.

5. Prepare the ground wire for attachment to the ampliﬁer by stripping 5/8” of insulation from the end of the wire. Always

use a wire of the same gauge as the power connection, never smaller. Insert the bare wire into the GND terminal and

tighten the set screw to secure the cable in place. Prepare the chassis ground by scraping any paint from the metal surface

and thoroughly clean the area of all dirt and grease. Strip the other end of the wire, crimp and soldier a ring connector.

Fasten the cable to the chassis using a non-anodized screw with a star washer.

WARNING: It is important to upgrade the ground

connection between the negative (-) battery post and the

vehicle body or chassis to achieve optimum electrical

performance.

6. Prepare the REM turn-on wire for attachment to the ampliﬁer

by stripping 5/8 inch (15.9mm) of insulation from the end

of the wire. Insert the bare wire into the REM terminal and

tighten the set screw to secure the wire in place. Connect the

other end of the REM wire to a switched 12 volt positive

source. The switched voltage is usually taken from the

source unit’s remote amp turn on lead. If the source unit

does not have this output available, the recommended

solution is to wire to an accessory terminal in the car’s fuse

block using a relay to isolate the amplifer from the vehicles

accessory circuit. This however will turn the ampliﬁer on and

off with the ignition key, regardless of whether the car stereo

is on or off.

7. Securely mount the ampliﬁer to the vehicle or amp rack. Be careful not to mount the ampliﬁer on cardboard or plastic

panels. Doing so may enable the screws to pull out from the panel due to road vibration or sudden vehicle stops.

8. Connect from source signal by connecting the RCA audio cables (or speaker wires) to the input jacks at the ampliﬁer.

FUSE CONNECTION DIAGRAM

9. Connect the car speakers. Speakers impedance should NEVER be less than 2 Ohms stereo, 4 Ohms bridged(the mono block’s

are stable into 1 ohms). For most applications 18 gauge wire is adequate for the speaker leads. For leads in excess of ten

feet, 16 gauge wire is recommended. Strip the speaker wires 1/2” (12.7mm) and insert into the speaker terminal block,

then tighten the set screw to secure into place. When wiring the speakers, pay careful attention to the polarity of the

terminals on the speakers and make certain they correspond to the polarity on the ampliﬁer. DO NOT chassis ground any

of the speaker leads as unstable operation or damage to the ampliﬁer and/or speaker may result.

RCA CONNECTION DIAGRAM

H71000.2 = 20A

H7900.4 = 30A

H71200.1D = 2X25A

H71800.1D = 2X35A

H72400.1D = 2X40A

H71200.5D = 2X25A

SPEAKER LEVEL INPUT (OPTIONAL)

* FUSES SHOULD BE EQUAL TO 1/2

OF FULL POWER CURRENT DRAW

Connect your OEM Headunit speaker

wiring directly into any of the NEW

H7 series amplifers with no additional

parts or adaptors. Just use the

HI-INPUT connector (except the

1200.5D use RCA for HI-INPUT)

FUSE

2CH

4CH

6CH

INPUT MODE

H71200.1D/H71800.1D/H72400.1D

13 12

H71000.2

H7900.4

H71200.5D

13 12

915

616 3

9651

FUSE

313 12

10 25

13 12

2 4 5

62/4 2/4

These lights indicate when the ampliﬁer is powered up normally and when there is a protection fault. The Protect

LED is laminated when there is a problem with your ampliﬁer. Please contact your authorize CVM dealer or call CVM’s technical support.

Use this adjustment to select the crossover point. Remember that you must select the Low Pass

position (LPF) of the crossover adjustment switch ﬁrst. The range of adjustment is limited between 35 - 350 Hz.

Use this adjustment to select the crossover point.

Remember that you must select the High Pass position (HPF) of the crossover adjustment switch ﬁrst. The range of adjustment is limited

between 15 - 350 Hz.

This control adds 0 to +12dB of boost at 45Hz. Be cautious when adding boost to some subwoofer systems as

they may not be able to handle the additional low frequency boost. In the 0dB position, no bass boost is added.

This switch allows you to select the crossover. Use High Pass for midrange or high frequency

speakers. Use Low Pass for subwoofers. In the FLAT position, neither crossover adjustment knob has an affect and all speakers will receive the

full frequency range.

This control matches the preamp stage of the Cerwin-Vega Mobile ampliﬁer to your source unit.

This is NOT a volume control. The range is between aprox 150mV -12V.

The RCA jacks allow for a normal Left and Right channel signal input. Simply connect to the source unit using RCA type

audio cables, keeping them away from power wiring wherever possible to reduce risk of noise.

These connections are for input power, chassis ground, and remote turn-on. Use a minimum of 8 gauge

wiring for power and ground connections, 18 guage for remote turn-on. . 4 Gauge is recommended for the mono blocks. The terminals will handle

up to 8 gauge wiring with no problem whatsoever (4 guage on the mono block). Be sure any wiring that passes through metal has a grommet!

Standard automotive type ATC/ATO fuses are used on Cerwin Vega Mobile ampliﬁers. Always replace with the correct fuse

size. Never insert fuses of higher values. Doing so will void the warranty of your Cerwin Vega Mobile ampliﬁer. Also include a main fuse at the

connection to the vehicle battery within18 inches of the positive battery post. It is also important to upgrade the connection between the negative

battery post and the chassis of the vehicle. This greatly reduces possibilities of weak electrical “links” in the circuit.

Connect your speakers to these terminals. Stereo connections are connected as labeled. Bridged

connections use the LEFT + and RIGHT - as the two connections. The 2 and 4 channel ampliﬁers will perform into 2 Ohm stereo loads or 4 Ohm

bridged loads. DO NOT run 2 Ohm bridged loads on these ampliﬁers! The mono blocks will run 1 ohms mono!

This port is for the remote level control (included with H71200.1D/H71800.1D/H72400.1D/H71200.5D).

The control is intended to allow the user to control the level of gain up to the maximum adjustment level set on the ampliﬁer. The control does not

add additional boost, it only attenuates the setting that is ﬁxed at the ampliﬁer’s control panel.

This control allows you to remove the unwanted sub-sonic frequencies below the tuning frequency of

a ported enclosure. This helps to protect the woofer from over excursion. Adjustable from 20 - 50Hz

This control helps solve issues with phyiscal placement of the subwoofer in relationship to you, the driver. It is simple

to use, have a friend adjust this control while playing music with bass until it sounds the best and the most forward in the vehicle. Your done.

This switch allows the installer to use only 2 channels of input to get 4 channels out (H7900.4)

Or 2, 4 or 6 channels of input to get 5 channels of output (only H71200.5D)

The RCA jacks allow for a “Pass Thru” from the H7900.4 ampliﬁer to a mono block amplifer (H71200.1D/1800.1D/2400.1D)

signal input. This simpliﬁes signal connection in a Front/Rear/Sub system with an aftermarket headunit that only has a 2 or 4 Ch output.

This plug/connector allows the installer to use speaker level input (up to 12 volts or about 50 watts) for

the signal instead of RCA’s. No need for LOCs, just plug in!

Set up