Hertz HDP 4 User Manual

HDP 4

Release 1.1

Revisione1.1

www.hertzaudiovideo.com

UK IT

HDP 4

Advanced Web Manual

TABLE OF CONTENTS

Introduction 3

Package contents 3

Safe Sound 4

General precautions 5

Installation and size 6

Battery / Remote connection and How to replace the fuse 7

Auto TURN-ON with Hi-Level inputs 7

How to rotate the Hertz logo 8

Top panel controls: switches and adjustment 9

Front and rear panels 10

Block diagram 11

Configuration diagrams

PRE-IN A for woofer and MID/HI 12

PRE-IN A/B for Front and Rear 13

PRE-IN A and HI-IN B for Front and Rear 14

HI-IN A and PRE-OUT 15

HI-IN A and B and PRE-OUT 16

HI-IN A and B for Front and Rear 17

PRE-IN A for Front and subwoofer MONO (bridge) 18

PRE-IN A and B for Front Dual Mono 19

HI-IN A and PRE-OUT for woofer and MID/HI 20

Cables 21

Technical specifications 22

2

HDP 4

Advanced Web Manual

INTRODUCTION

Thank you for purchasing a Hertz product, designed according to the highest quality standards.

Your HPD amplifier is a cutting-edge product of compact size, providing high power and quality of sound.
It will definitely ensure you maximum satisfaction by taking up very small room in your vehicle.
Before the installation, in addition to reading the Quick Start Guide (QSG), the consultation of this user’s manual available on the Hertz
website will let you achieve the highest performance from your amplifier.

PACKAGE CONTENTS

In the package, besides your amplifier, you will find:

• Quick Start Guide ...............................................................................................................................................................

•Warranty Card......................................................................................................................................................................

• 40 A blade fuse.................................................................................................................................................................. x2

• 4,2 x 16 mm self-tapping, cross-headed fixing screws ......................................................................................................... x4

3

40

HDP 4

Advanced Web Manual

SAFE SOUND

HERTZ AMPLIFIERS CAN BE PART OF A HIGH POWER AUDIO SYSTEM THAT CAN GENERATE VERY HIGH UNDISTORTED

SOUND PRESSURE LEVELS. PLEASE REMEMBER THAT LONG EXPOSURE TO AN EXCESSIVELY HIGH SOUND PRESSURE

LEVEL MAY DAMAGE YOUR HEARING; THEREFORE, PLEASE USE COMMON SENSE AND PRACTICE SAFE SOUND.

Safety must be at the forefront while driving. The listening volume should never obscure the noise coming from the outside of your

vehicle; you should be able to hear the sounds generated by your vehicle in order to promptly face any emergency situation.

To achieve the best possible performance from your new components, we recommend you follow the instructions in this manual

carefully. In order to design and create top level car hi-fi systems you need to understand automobile mechanical and electrical issues

very well; if you think you lack the required knowledge or the proper tools, please consult with a specialized installer.

A professional installation will ensure your system delivers all the performance you have paid for, without affecting the safety and

reliability of your vehicle.

This manual has been designed to provide you with the basic instructions required to install and use this product. However, the range

of possible applications is very wide; to obtain further information, please contact your authorized Hertz dealer or Hertz service center.

You can also send an e-mail directly to the following addresses:

Italy - [e-mail]

Worldwide - [e-mail]

4

HDP 4

Advanced Web Manual

GENERAL PRECAUTIONS

• This symbol indicates that you have to pay attention to these instructions. Disregarding them
might cause accidental harms or damage your amplifier.

• Before installing the amplifier, make sure you carefully read and understand all instructions.

• The vehicle electric system must have 12V DC voltage with negative to ground. Make sure your
car has it in order to avoid any damages to your amplifier and to the vehicle.

• Pre-plan the configuration of your new amplifier and the best wiring routes to ease installation.

• Always wear protective eyewear when using tools that may generate splinters.

• During installation, keep the amplifier in its packing as long as possible; this will protect it from damages.

• Secure all auxiliary devices you built to install the components to the vehicle structure through
brackets, screws, nuts and bolts; this insures stability and safety while driving.

• The amplifier detachment while driving can damage the people in the vehicle and other cars. Secure the
amplifier at best, paying utmost attention if installation is inside the passenger’s compartment. Do not carry out
any installation inside the engine compartment.

• Before installing the amplifier, turn off the source and all other electronic devices in the audio system for preventing any damages.

• Make sure the location you chose for the components does not affect the correct functioning of the vehicle mechanic and
electric devices.

• Do not run the cables or install the amplifier next to electronic gearcases.

• Use extreme caution when cutting or drilling the car plate, checking there are no electrical wiring or structural element underneath.

• Before connecting the power cable to the amplifier, disconnect the negative lead ( - ) from the car battery.

• Make sure power cable is not short circuited during installation and connection.

• Power cable must have mechanically resistant and self-extinguishing insulation. Its section have a size corresponding with
what is suggested in this manual. Avoid to run it over or through sharp edges or close to moving mechanical devices. Make
sure it is well fixed all along its length. Block positive and negative cables just close to the amplifier respective power supply
terminal blocks through a clamping screw.

• Use rubber grommets to protect the wire if it runs in a hole of the plate or proper materials if it is close to heat-generating parts.

• To ground the device ( - ) in the right way, use a screw in the vehicle chassis; scrape all paint or grease from the metal if
necessary, checking with a tester that there is continuity between the battery negative terminal ( - ) and the fixing point. If
possible, connect all components to the same ground point; this solution rejects most noise.

• Route all signal cables away from power cables.

• Never run cables outside the vehicle; you would not be protected against wear and in case of accidents.

• When installing speakers and the cables that connect them, make sure that non-insulated parts never touch, even occasionally,
the vehicle cutting parts. If they do, the amplifier protection is activated.

• To prevent all problems, use very good quality cables, connectors and accessories, choosing them in Connection catalogue.

• When installation is over, and before plugging the main power supply fuse, check the system wiring and make sure all
connections were done in the right way.

• Power amplifiers put an increased load on the battery and on its charging system. We recommend checking your alternator
and battery condition to ensure they can handle the increased consumption. Standard electrical systems which are in good
condition should be able to stand this extra load without problems but we recommend the use of an energy storage
capacitor and/or a battery for high level audio systems.

• Put a fuse and its insulated fuse holder 40 cm max. far from the battery positive terminal; connect one end of the power cable
to it after connecting the other end to the amplifier. The fuse value must be 50% higher than the amplifier built-in one. In case
the cable supplies several amplifiers, the fuse value will have to be 50% higher than the sum of the values of all other fuses in
the amplifiers.

• There must be good air circulation where the amplifier is installed; this area must not be affected by humidity, rain, external
deposits or parts coming from the vehicle mechanical devices. Do not hinder in any way the cooling of the amplifier side fins

• Install the amplifier in the vehicle parts where temperature is between 0°C (32°F) and 55°C (131°F).

WARNING. When working in demanding conditions, the amplifier can reach temperatures of around 80 - 90°C (176÷194°F).

Make sure it is not dangerously hot before touching it.

• Periodically clean the amplifier without using aggressive solvents that might damage it. Dampen a piece of cloth with water
and soap, wring it and clean the amplifier. Then use a piece of cloth dampened with water only; eventually clean the amplifier
with a dry piece of cloth.

• Remove dust and solid deposits from the heat sink side fins. Don’t use compressed air on the amplifier since it would push
solid parts in the amplifiers. If necessary, please contact a specialised service centre for internal cleaning. Cooling system
obstruction makes the amplifier go in safety mode

.

5

HDP 4

INSTALLATION AND SIZE

Advanced Web Manual

284 mm / 11.18”

171 mm / 6.73”

46,7 mm / 1.83”

150 mm / 5.90”

270 mm / 10.62”

6

HDP 4

Advanced Web Manual

BATTERY / REMOTE CONNECTION AND HOW TO REPLACE THE FUSE

2 x 40 A
BLADE FUSES

GND

+BATTERY

Apply a Fuse

close to positive

pole to protect

+BATTERY wire

AUTO-TURN ON WITH HI-LEVEL INPUTS

ORIGINAL SOURCE

REMOTE OUT

Set the

“HI AUTO TURN-ON”

switch to the
“ON” position

ORIGINAL

SOURCE

7

A HI - IN

A PRE - IN B PRE - INPRE - OUT

LL

R

HDP4

HI-IN
AUTO

TURN-ON

ON OFF

B HI - IN

R

Set the “HI AUTO TURN-ON”

switch to the “ON” position

INPUT

B

A B

HDP 4

HOW TO ROTATE THE HERTZ LOGO

Advanced Web Manual

1

3

Remove and
Rotate

180°

180°

2

4

6

5

PUSH

8

7

9

8

HDP 4

Advanced Web Manual

TOP PANEL CONTROLS: SWITCHES AND ADJUSTMENT CONTROLS

1 3

12

10

11

25

ON OVL

25

TH SPK

LEVELS PASS MODE MODE

34

1

LEVELS PASS MODE MODE

34

1

HI FULL LO ST MO (R)

max

HI FULL LO ST MO (R)

max

13

5

B CH LEVELS (0.3 ÷ 5V): B channels input sensitivity

1

6

adjustment control. Set to 1 position. Use a CD as source,
increase head unit volume until output distorts, then decrease
volume by 1 step in order to eliminate distortion.
Turn LEVELS up until sound becomes distorted, then turn
LEVELS down a bit for optimum sound.

2

PASS MODE (HI - FULL - LO): B channels filter switch.

Select FULL to drive full range power outputs. The full frequency
bandwidth will be output to power output connectors.
Select HI for Hi-pass to drive a MIDRANGE / TWEETER.
Select LO for Lo-pass to drive a SUB / WOOFER / MIDRANGE.

MODE (ST - MO(R): Select ST to set B channels to stereo

3

mode. Left and Right input signals drive Left and Right power
outputs. Select MO(R) for mono (bridge) operation. With this
setup the Right input channel drives BR and BL power output,
so connect loudspeaker to BL- and BR+ for proper bridge
connection.

XOVER (80 Hz ÷ 3.3 kHz): B channels crossover point

4

adjustment. Rotating the knob you can select any frequencies
between 80 Hz and 3.3 kHz. The frequencies above crossover
point will be attenuated at 12dB/Oct.

A CH LEVELS (0.3 ÷ 5V): A channels input sensitivity

5

adjustment control. Set to 1 position. Use a CD as source,
increase head unit volume until output distorts, then decrease
volume by 1 step in order to eliminate distortion. Turn LEVELS
up until sound becomes distorted, then turn LEVELS down
a bit for optimum sound.

PASS MODE (HI - FULL - LO): A channels filter switch.

6

Select FULL to drive full range power outputs.
The full frequencies bandwidth will be output to power output
connectors. Select HI for Hi-pass to drive a MIDRANGE /
TWEETER. Select LO for Lo-pass to drive a SUB / WOOFER /
MIDRANGE.

42

B - ch

XOVER

160800

HDP4

80 3.3k

XOVER

100250

50 500

A - ch

7 8 9

7

MODE (ST - MO(R): Select ST to set A channels to stereo

mode. Left and Right input signals drive Left and Right power
outputs. Select MO(R) for mono (bridge) operation. With this

setup the Right input channel drives AR and AL power output,
so connect loudspeaker to AL- and AR+ for proper bridge
connection.

XOVER (50 Hz ÷ 500 Hz): A channels crossover point

8

adjustment. Rotating the knob you can select any frequency
between 50 Hz and 500 Hz. The frequencies over crossover
point will be attenuated at 12dB/Oct.

MULTIPLIER (x1 - x10): Select X1 for normal frequency range

9

(50 Hz - 500 Hz) of A channel filter (Hi-pass or Lo-pass).
Select X10 for crossover point multiplied by 10 (500 Hz - 5 kHz).

10

ON: Power LED. It lights up when you turn on the amplifier. If

all LEDs (10) (11) (12) (13) turn on at the same time, the amplifier
will shut down and you will have to contact a service centre.

11

TH: Thermal status LED. It lights up when thermal protection

is active, above 85°C. The amplifier shuts down until the chassis
temperature goes below 75°C.

12

OVL: Overload status LED. It lights up when overload

occurs on the power output terminals. The amplifier goes in
muting for 3 seconds and this LED starts flashing until you turn
off the amplifier.

REMOVE THE CAUSE OF OVERLOAD.

13

SPK: Speaker status LED. It lights up when a speaker touches

the car body. The amplifier goes in muting for 3 seconds and
this LED starts flashing until you turn off the amplifier.

REMOVE THE CONTACT BETWEEN SPEAKER WIRE AND
CAR BODY.

MULTIPLIER

X1 X10

9

HDP 4

FRONT AND REAR PANELS

1 2 3

Advanced Web Manual

98

10 11

A PRE - IN B PRE - INPRE - OUT

L

A HI - IN

R

4

A PRE-IN: Left and Right pre-amplified inputs to drive

1

A channels. Connect to pre-amplified source output.

HDP4

HI-IN
AUTO

TURN-ON

ON OFF

L

B HI - IN

B

INPUT

R

A B

5 76 12 13 1514

Signal can be 0.3 to 5V RMS.

PRE-OUT: This jack provides A channel Left and Right

2

preamplified outputs to drive a separate amplifier (typical with
subwoofer). These signals are full range, without crossover
action.

B PRE-IN: Left and Right pre-amplified inputs to drive B

3

channels. Connect to preamplified source output.
Signal can be 0.3 to 5V RMS.

A HI - IN: Hi-Level signals Left and Right inputs for A

4

channels. If the head unit does not feature a pre-amplified
output, connect here its speaker wire to drive A Left and Right
channels.

HI - IN AUTO TURN-ON (ON - OFF): Select ON to turn on the

5

amplifier through the speaker power cable, if the source does
not feature a 12V DC REMOTE OUT. Select OFF if REMOTE
OUT from the source is available.

HDP4

FUSE 2 x 40A

8

PROTECTION FUSE: 2 x 40A.

POWER (+ BATT): Terminal block for the amplifier 11÷15V

9

DC power supply positive pole connection. Insert here the

REM

GND+ BATT

B A

L R ( mono ) L R ( mono )

L ( mono ) L ( mono )

battery positive cable. The plug accepts cables up to 2 A.W.G.

REMOTE IN: REMOTE IN terminal for the remote cable

10

coming from the device which turns on the amplifier. Voltage
must be between 7 and 16V DC.

11

POWER (GND): Terminal block for the amplifier power supply

negative pole connection. Insert here the battery negative

cable or wire connected to the vehicle chassis. The plug
accepts cables up to 2 A.W.G.

BL Speaker OUT: B channel Left speaker + and - power

12

terminal. For MONO (bridge) mode, connect the speaker
negative terminal to BL- terminal.

BR Speaker OUT: B channel Right speaker + and - power

13

terminal. For MONO (bridge) mode, connect the speaker
positive terminal to BR+ terminal.

B HI - IN: Hi-Level signals Left and Right inputs for B

6

channels. If the head unit does not feature a pre-amplified
output, connect here its speaker wire to drive B Left and Right
channels.

7

B INPUT (A - B): Select A to drive B channels with A input

signals. Whit this setup, do not connect B inputs. If the source
features a REAR output, select B and connect its signals to B
inputs (B PRE-IN or B HI-IN).

AL Speaker OUT: A channel Left speaker + and - power

14

terminal. For MONO (bridge) mode, connect the speaker
negative terminal to AL- terminal.

15

AR Speaker OUT: A channel Right speaker + and - power

terminal. For MONO (bridge) mode, connect the speaker

positive terminal to AR+ terminal.

10

HDP 4

BLOCK DIAGRAM

A - LEFT

Advanced Web Manual

OUT A:

Full

Lo-pass

Hi-pass

+AR / -AL

MONO

(bridge)

A - RIGHT

B - LEFT

OUTB:

Full

Lo-pass

Hi-pass

+BR / -BL

MONO

(bridge)

B - RIGHT

L

AMP

S1-B

B

A

A STEREO / MONO

S2

A PASS MODE

Lo-pass

XOVER

50-500 Hz

500-5K Hz

ABC

A = 12dB Stereo

Hi-pass

12dB/Oct.

P2

B = 24dB Mono

R

AMP

A = Hi-pass

B = Lo-pass

ABC

Lo-pass

XOVER

X1 - X10

50-500 Hz

500-5K Hz

S1-A

B

A

C = Full

Hi-pass

12dB/Oct.

P2

A = 12dB Stereo

B = 24dB Mono

A STEREO / MONO

L

AMP

S4-B

B

A

B STEREO / MONO

S5

XOVER

80-3.3k Hz

ABC

Lo-pass

B PASS MODE

A = 12dB Stereo

Hi-pass

12dB/Oct.

P4

B = 24dB Mono

S4-A

R

Lo-pass

XOVER

80-3.3k Hz

B

A

AMP

ABC

A = Hi-pass

B = Lo-pass

C = Full

Hi-pass

12dB/Oct.

P4

= 12dB Stereo

B = 24dB Mono

B STEREO / MONO

L

A

HI-IN

(1.4-24V)

A LEVEL

5V – 300mV

P1

BUFFER

PRE-OUT

& MUTING

R

L

R

RCA prot

A

PRE-IN

L

PRE-OUT

R

L

B

HI-IN

(1.4-24V)

R

B LEVEL

5V – 300mV

S3

B

L

P3

B INPUT

A

A = B INPUT

B = A INPUT

R

RCA prot

B

PRE-IN

STEREO SIGNALS

11

HDP 4

PRE-IN A FOR WOOFER AND MID/HI

Advanced Web Manual

A HI - IN

HDP4

FUSE 2 x 40A

A PRE - IN B PRE - INPRE - OUT

L

R

FRONT

HDP4

L

HI-IN

AUTO

TURN-ON

ON OFF

R

B HI - IN

B

INPUT

A B

R

L

SOURCE

REM

GND+ BATT

B A

L R ( mono ) L R ( mono )

L

( mono )

L

( mono )

25

ON OVL

25

TH SPK

L

R

LEVELS PASS MODE MODE

34

1

LEVELS PASS MODE MODE

34

1

HI FULL LO ST MO (R)

max

HI FULL LO ST MO (R)

max

MID/HI

MID/HI

B - ch

XOVER

160800

80 3.3k

XOVER

100250

50 500

A - ch

WOOFER

HDP4

MULTIPLIER

X1 X10

R

WOOFER

L

N.A.

Selected function

Adjustment controls System Start-up

12

HDP 4

PRE-IN A / B FOR FRONT AND REAR

Advanced Web Manual

A PRE - IN B PRE - INPRE - OUT

L

A HI - IN

R

HDP4

R

FRONT REAR

HDP4

FUSE 2 x 40A

L

SOURCE

REM

GND+ BATT

L

HI-IN

AUTO

TURN-ON

ON OFF

R

B HI - IN

R

L

B A

L R ( mono ) L R ( mono )

L

( mono )

L

( mono )

B

INPUT

A B

25

ON OVL

25

TH SPK

LEVELS PASS MODE MODE

34

1

LEVELS PASS MODE MODE

34

1

HI FULL LO ST MO (R)

max

HI FULL LO ST MO (R)

max

L

R

REAR

REAR

B - ch

XOVER

160800

80 3.3k

XOVER

100250

50 500

A - ch

FRONT

HDP4

MULTIPLIER

X1 X10

R

FRONT

L

N.A.

Selected function

Adjustment controls System Start-up

13

HDP 4

PRE-IN A AND HI-IN B FOR FRONT AND REAR

Advanced Web Manual

A HI - IN

HDP4

FUSE 2 x 40A

A PRE - IN B PRE - INPRE - OUT

L

R

R

FRONT

L

REM

HDP4

SOURCE

GND+ BATT

L

HI-IN

AUTO

TURN-ON

ON OFF

R

B HI - IN

R

L

SPEAKER WIRE

B A

L R ( mono ) L R ( mono )

L ( mono ) L ( mono )

REAR

B

INPUT

A B

25

ON OVL

25

TH SPK

LEVELS PASS MODE MODE

34

1

LEVELS PASS MODE MODE

34

1

HI FULL LO ST MO (R)

max

HI FULL LO ST MO (R)

max

L

R

REAR

REAR

B - ch

XOVER

160800

80 3.3k

XOVER

100250

50 500

A - ch

FRONT

HDP4

MULTIPLIER

X1 X10

R

FRONT

L

N.A.

Selected function

Adjustment controls

14

System Start-up