Hertz Marine HMD8 DSP User manual

CTRL
FUSE2x30A
HMD8DSP
USB
PRESETSOPTICALIN
SUBOUT
SPEAKERINPREIN
DRC
UPGRADE
OFFON
SPEAKEROUT
HMD8DSP
USER’S
MANUAL
HMD8 DSP
hertzaudiovideo.com
rev. 1
POWER

2
HMD8 DSP/
USER’S MANUAL
Index
1. PRODUCT DESCRIPTION / PRECAUTIONS ........................................................................................................................... 3
2. PACKAGE CONTENTS ............................................................................................................................................................. 4
3. HMD8 DSP INSTALLATION .................................................................................................................................................... 5
3.1 DEVICE INSTALLATION .................................................................................................................................................... 5
4. CONNECTION PANEL DESCRIPTION ..................................................................................................................................... 6
1POWER.............................................................................................................................................................................. 6
2 FUSE ................................................................................................................................................................................ 7
3 CTRL (REM IN-OUT. / CONTROL).................................................................................................................................... 7
4 SPEAKER OUT................................................................................................................................................................... 8
5 SPEAKER IN ...................................................................................................................................................................... 8
6 PRE IN ............................................................................................................................................................................... 8
7 SUB OUT............................................................................................................................................................................ 9
8 OPTICAL IN........................................................................................................................................................................ 9
9 PRESET.............................................................................................................................................................................. 9
10 UPGRADE switch.............................................................................................................................................................. 9
11 MIRCO USB. ...................................................................................................................................................................... 9
12 DRC ................................................................................................................................................................................ 9
13 LOGO STATUS ................................................................................................................................................................... 9
5. CONNECTIONS ...................................................................................................................................................................... 10
5.1 POWER SUPPLY AND REMOTE TURN ON................................................................................................................... 10
5.2 MEMORY SELECTION SWITCH...................................................................................................................................... 11
5.3 INPUT SIGNALS............................................................................................................................................................... 11
5.4 DIGITAL OPTICAL IN INPUT SIGNALS............................................................................................................................ 12
5.5 OUTPUT SIGNALS ........................................................................................................................................................... 13
5.6 PC CONNECTION............................................................................................................................................................. 14
6. CONFIGURATION SOFTWARE............................................................................................................................................. 15
6.1 LINK TO DEVICE.............................................................................................................................................................. 15
6.2 SAVE AND LOAD THE CONFIGURATION ...................................................................................................................... 16
6.3 SETTINGS......................................................................................................................................................................... 16
6.4 AUDIO SETUP.................................................................................................................................................................. 17
6.4.1 GENERAL GUIDELINES....................................................................................................................................... 17
6.4.2 SOURCES ............................................................................................................................................................. 19
6.4.3 INPUT CHANNELS .............................................................................................................................................. 20
6.4.4 OUTPUT CHANNELS........................................................................................................................................... 22
6.4.5 OUTPUT CHANNEL GROUPS ............................................................................................................................. 23
6.4.6 LISTENING ZONES .............................................................................................................................................. 24
6.4.7 MIXER .................................................................................................................................................................. 25
6.4.8 DELAYS AND DISTANCES................................................................................................................................... 26
6.4.9 CROSSOVER ........................................................................................................................................................ 29
6.4.10 EQUALIZER.......................................................................................................................................................... 31
6.4.11 MEMORIES.......................................................................................................................................................... 32
6.4.12 GRAPH................................................................................................................................................................. 38
6.4.13 WORK NOTES...................................................................................................................................................... 40
6.5 EXTENDED FUNCTIONALITIES ...................................................................................................................................... 41
6.5.1 WIZARD ............................................................................................................................................................... 41
6.5.2 FEATURES. .......................................................................................................................................................... 42
6.5.3 REAL TIME ANALYSIS......................................................................................................................................... 42
6.5.4 STATUS BAR........................................................................................................................................................ 43
7. TROUBLESHOOTING............................................................................................................................................................. 44
7.1 SYNCHRONIZATION WITH A PC.................................................................................................................................... 44
7.2 FIRMWARE UPDATE...................................................................................................................................................... 44
8. TECHNICAL SPECIFICATIONS .............................................................................................................................................. 45

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HMD8 DSP/
USER’S MANUAL
1. PRODUCT DESCRIPTION / PRECAUTIONS
Thank you for purchasing the HMD8 DSP amplifier for your marine sound system. Your amplifier has been designed and
manufactured to exacting standards in order to ensure years of musical enjoyment in your vessel. For maximum performance,
we highly recommend that you have your new amplifier installed by an authorized Hertz dealer. Your authorized dealer has the
training, expertise and installation equipment to ensure optimum performance from this product. Should you decide to install the
amplifier yourself, please take the time to read this manual thoroughly so as to familiarize yourself with its installation
requirements and setup procedures. If you have any questions regarding the instructions in this manual or any aspect of your
amplifier’s operation, please contact your authorized Hertz dealer for assistance.
This section describes the main features of the amplifier and the connector panel. Some operating procedures for the correct
installation and the best use of the product are also illustrated.
HMD8 DSP is a 9-channel amplifier with 8 amplified channels settable in bridge mode; it also features a 32 bit, 147 MHz clock
speed, 24 bit AD/DA converter digital sound processor (DSP), essential to maximize the acoustic performance of your audio
system. It features 6 Hi-Level / 6 Pre input channels on the master analog source and 1 S/PDIF optical digital.
It provides 8 amplified power outputs and 1 pre-amplified optimized to drive a subwoofer.
Before connecting the product, carefully read this manual.
Improper connections may cause damage to HMD8 DSP or to the speakers in your audio system.
It is important that you take the time to read this manual and that you plan out your installation carefully.
WARNING: 1. A PC provided with Windows 7, Windows 8 or Windows 10 operating system, 1.5 GHz
minimum processor speed, 2 GB RAM minimum memory and a 1024 x 600 pixels minimum resolution
graphics card as well as at least 1 GB of available hard-disk space is required to install the software
and setup the product.
2. Before connecting the product, carefully read this manual. Improper connections may cause damage to
HMD8 DSP or to the speakers in your vessel audio system.
Protect Your Hearing.
Studies have shown that continuous exposure to high sound pressure levels can lead to permanent (irreparable) hearing loss.
This and all other high-power amplifiers are capable of producing very high sound pressure levels when connected to a
speaker system. Please limit your continuous exposure to high volume levels.
While driving, operate your audio system in a manner that still allows you to hear necessary noises to operate your vessel safely
(horns, sirens, etc.).
This amplifier is designed for operation in vessels with 12V or else 24V and negative-ground electrical systems, according
to the information silk-screened on the amplifier power connection terminal.
Use of this product in vessels with positive ground and/or voltages other than 12V or 24V may result in damage to the
product and will void the warranty.
This product is not certified or approved for aircraft use.
The external case of this amplifier is designed to remove heat from the amplifier circuitry.
For optimum cooling performance, this external case should be exposed to as large a volume of air as possible.
Enclosing the amplifier in a small, poorly ventilated chamber can lead to excessive heat build-up and degraded performance.
If an installation calls for an enclosure around the amplifier, we recommend that this enclosure be ventilated with the aid of a fan.
In normal applications, fan-cooling is not necessary.
The amplifier needs to be installed in a dry, well-ventilated environment and in a manner which does not interfere with
your vessel’s factory installed electronic devices.
You should also take the time to securely mount the amplifier so that it does not come loose in the event of a collision /
sudden jolt or as a result of the repeated vibrations the vessel is prone to during normal operation.
Remark: Check before drilling any holes in your vessel to make sure that you will not be drilling through the hull, a fuel tank, fuel
line, wiring harness or other vital vessel system.
Remark: Do not run system wiring outside or underneath the vessel. This is an extremely dangerous practice which can result in
severe damage to your vessel and person.
Remark: Protect all system wires from sharp edges (metal, fiberglass, etc.) by carefully routing them, tying them down and using
grommets and loom where appropriate.
Remark: Do not mount the amplifier in the engine compartment or in any other area that will expose the amplifier circuitry to the
elements.
While this amplifier is specially designed for marine applications, it is not waterproof and it should not be mounted where
it is likely to get wet.
The following are some considerations that you must take into account when planning your installation.
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HMD8 DSP/
USER’S MANUAL
2. PACKAGE CONTENTS
-2 - 30 A replacement fuse:
or
2 - 15 A replacement fuse:
-1.8 m USB cable:
-2.5 mm hex key:
-4 - 4.2 x 50 mm self-tapping, cross head mounting screws:
-SWITCH for memory selection:
-HMD8 DSP amplifier
-CD ROM containing:
HMD8 DSP Software
This owner’s manual (.pdf)
Audio Test Tracks
-Multipolar cable, Hi-level Input:
-Multipolar cable, Input Pre-IN:
-Multipolar cable, Rem/Control:
-Output Multipolar cable:
IN 1
IN 2
IN 3
IN 4
IN 5
IN 6
IN 6
IN 5
IN 4
IN 3
IN 2
IN 1
OUT 8
OUT 7
OUT 6
OUT 5
OUT 4
OUT 3
OUT 2
OUT 1
CONTROL 1
CONTROL 2
REM IN
REM OUT
2

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HMD8 DSP/
USER’S MANUAL
3. HMD8 DSP INSTALLATION
External size Mounting size
How to mount
HMD8 DSP HMD8 DSP
WARNING for all cable INPUT/OUTPUT
159 mm / 6.25 in.
243 mm / 9.56 in.
139 mm / 5.47 in.
224 mm / 8.81 in.
48 mm / 1.8 in.
CTRL
PRESETS
SUB OUT
SPEAKER IN
UPGRADE
OFF ON
SPEAKER OUT
OK
3
3.1 DEVICE INSTALLATION
The following represents the sequence for a typical amplifier installation, using an aftermarket source unit or OEM
Interface processor.
Additional steps and different procedures may be required in some applications.
If you have any questions, please contact your authorized Hertz dealer for assistance.
1. Disconnect the negative battery post connection and secure the disconnected cable to prevent accidental re-connection
during installation. This step is not optional!
2. Run positive and negative power wire from the battery location to the amplifier mounting location, taking care to
route it in such a way that it will not be damaged and will not interfere with vessel operation.
3. Connect power wire to the positive battery post.
4. Connect negative power wire to the negative battery post. Use the same size power wire as the wire connected to
the positive power supply connection.
5. Run signal cables and remote turn-on wire from the source unit or interface processor to the amplifier mounting
location. Run also the control cables for memory switch.
6. Run speaker wire from the speakers to the amplifier mounting location.
7. Securely mount the amplifier using appropriate hardware.
8. Connect the remote turn-on wire and the positive and negative power wires to the amplifier’s power connector plug.
9. Connect the input cables to the amplifier.
10.Connect the speaker wires to the speaker connector.
11.Carefully review the amplifier’s control settings to make sure that they are set according to the system’s needs.
At this point you can turn on the amplifier and start the software configuration, according to the design of your audio system.

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HMD8 DSP/
USER’S MANUAL
4. CONNECTION PANEL - DESCRIPTION
POWER.
+ Power (11-15 VDC or 22-34 VDC according to POWER silk-screened value): connection terminal for power supply
positive pole.
The jack accepts a stripped cable up to 15mm / 0.6” with maximum section of 8 AWG (∅3,2mm / 0.12”). For better
power transfer we recommend using cables with the largest possible cross-section and with the same cross-section
as the cable connected to the negative pole.
- Power (Ground): connection terminal for the negative power supply pole of the amplifier. Connect here the negative
battery cable or a cable connected to the metal part of the vessel chassis. The socket will take a stripped cable up to 15mm / 0.6”
with a maximum section of 8 AWG (∅3,2mm / 0.12”). For better power transfer, we recommend using cables with
the largest possible section and with the same section as the cable connected to the positive pole. In order to correctly
connect the ground (-), use a screw that is already present on the metal part of the vessel; if necessary, remove any
paint residue or grease, using a tester to make sure there is continuity between the negative terminal (-) on the battery
and the mounting point. If possible, connect all of the grounds on the audio components to the same grounding point.
This helps to reduce most of the interference than can occur in audio reproduction.
WARNING: make sure the connection polarity is as indicated on the terminals. A misconnection may result in
damage to the device. After applying power, wait at least 10 seconds before turning the device on.
1
4
HMD8 DSP
HMD8 DSP
01
2
3
4
5
6
7
USB
PRESETS OPTICAL IN
SUB OUTCTRL SPEAKER IN PRE IN
DRC
UPGRADE
OFF ON
SPEAKER OUT
13
910
31 74 5
8
12
11
2
6
FUSE x 2
POWER

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HMD8 DSP/
USER’S MANUAL
FUSE
30 A blade protection fuse for 12V power supply or 15 A blade protection fuse for 24V power supply. In case the
fuse needs to be replaced, use same type and value as the original.
2
CTRL (REM IN-OUT / CONTROLS): terminals to turn on and control the HMD8 DSP.
- Remote IN: input to turn on the device. The voltage must be between 7 and 14.5 VDC for 12V power supply or
between 6 and 34 VDC for 24V power supply.
- Remote OUT: output to turn on other devices connected in cascade.
- CONTROL 1: it allows the memory selection. This control is active bringing the terminal to +12 V or +24 V according to
power supply voltage. More details on Memory selection switch
(see. section 5).
- CONTROL 2: it allows the memory selection. This control is active bringing the terminal to +12 V or +24 V according to
power supply voltage. More details on Memory selection switch (see. section 5).
3
4
320 mm / 12.6 in.
Wire Size: AWG 20
10 mm
0.39 in.
brown
blue/black
blue
pink
FRONT VIEW
blue/blackblue
pinkbrown
CONTROL 1
CONTROL 2
REM IN
REM OUT
2 X 30A
(HMD 8 DSP 12V)
or
2 x 15A
(HMD 8 DSP 24V)
Blade fuse
CTRL
FUSE
2x30A
HMD8
DSP
USB
PRESETSOPTICAL
IN
SUB
OUT
SPEAKER
INPRE
IN
DRC
UPGRADE
OFF
ON
SPEAKER
OUT
POWER
-
12V
HMD8
DSP

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HMD8 DSP/
USER’S MANUAL
4
PRE IN
HMD8 DSP is provided with a 12 poles multipolar connector to manage the PRE IN input signals to interface head
units featuring a PRE OUT output. Connect up to a maximum of 6 input channels using the multipolar connector
supplied. The signal to be applied must have a value ranging between 0.6 and 6 Vrms. Such input channels can be
then customized using the configuration software.
6
IN 6
IN 5
IN 4
IN 3
IN 2
IN 1
320 mm / 12.6 in.
10 mm
0.39 in.
SPEAKER IN.
HMD8 DSP is provided with a 12 pole multipolar connector to manage the input signals. Connect up to a maximum
of 6 input channels using the multipolar connector supplied. The signal to be applied must have a value ranging
between 2.2 and 22 Vrms. Such input channels can be then customized using the configuration software.
5
FRONT VIEW
white
green
blue
white/black
green/black
blue/black
gray
purple
orange
gray/black
purple/black
orange/black
FRONT VIEW
white
green
blue
white/black
green/black
blue/black
gray
purple
orange
gray/black
purple/black
orange/black
320 mm / 12.6 in.
10 mm
0.39 in.
Wire Size: AWG 20
SPEAKER OUT.
HMD8 DSP is provided with a 16 pole multipolar connector to manage the power output signals.
4
Wire Size: AWG 16
320 mm / 12.6 in.
10 mm
0.39 in.
+
+
+
+
+
+
+
+
-
-
-
-
-
-
-
-
FRONT VIEW
OUT 1 -
OUT 3 -
OUT 5 -
OUT 7 -
OUT 1 +
OUT 3 +
OUT 5 +
OUT 7 +
OUT 2 -
OUT 4 -
OUT 6 -
OUT 8 -
OUT 2 +
OUT 4 +
OUT 6 +
OUT 8 +

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HMD8 DSP/
USER’S MANUAL
SUB OUT.
Pre-amplified output subject to low pass filtering optimized to drive a mono amplifier for an external subwoofer or
active subwoofer.
OPTICAL IN.
HMD8 DSP accepts at its input PCM signals up to 192 kHz / 24 bit sampling frequency rate. Connect a fiber optic cable
with a TOSLINK connector.
Remark: DOLBY DIGITAL (AC3) multi-channel signals coming from audio/video sources (such as the audio of a film in DVD)
or DTS can not be reproduced.
PRESET.
HMD8 DSP features 7 setups preloaded in its memory, identified by the numbers 1 to 7 of the selector. They allow
the product to be used without the need to connect it to a PC.
WARNING: Make sure you have connected the speakers according to the scheme of the selected preset
before turning the amplifier on.
Remark: when using one of the 7 presets, communication via USB is inhibited and the configuration software is unable
to detect the device even if it is connected to the PC.
By turning the selector to position 0, the device is fully configurable by the user through the configuration software
via USB connection.
UPGRADE switch.
Switch ON allows the product to be updated in BOOT LOADER mode.
Micro USB.
USB micro receptacle to connect the product to a PC in order to manage the functions using the configuration
software. The connection is USB 1.1/2.0/3.0 compatible.
DRC.
Terminal for future use.
7
8
9
10
11
12
4
LOGO STATUS.
HMD8 DSP is provided with a built-in control that manages its status and protects the circuits and connections to the
speakers. The logo on the HMD8 DSP top cover will change its status in case of any possible product malfunctions.
A WHITE logo means:
HMD8 DSP is on.
Flashing RED/WHITE logo means:
The “UPGRADE MODE” switch on the product is set to “ON” position, or the product Firmware is being updated.
Flashing RED logo means:
- HMD8 DSP temperature reached 75° C and the thermal protection was triggered. It will start operating again at
around 70° C.
RED logo flashing twice every second means:
- Output overload. The red LED flashes when the output load goes below the minimum allowed capacity of about
2Ω impedance. The LED comes on without flashing, activating the protection. When listening to music, if the
acoustic reproduction stops for a few seconds, check if the red amplifier LED is flashing. This means there was
an overload. Turn the amplifier off and check the speakers and wirings. This protection is self-restoring.
- Speaker wiring anomaly. The red LED flashes when a terminal on the speaker goes in short-circuit. When
listening to music, if the acoustic reproduction stops for a few seconds, check to see if the red amplifier LED
is flashing; this means there was a short circuit between the two terminals. Turn off the amplifier and check the
speakers and wiring. This protection is self-restoring.
RED logo flashing four times every second means:
- “OVER VOLTAGE” protection activation, due to the fact that the battery voltage is higher than
18V (for HMD8 DSP 12V); 36V (for HMD8 DSP 24V) .
The product will turn off after 3 minutes.
RED logo means:
- Product internal fault. Please contact an authorized service centre. The product will turn off after 3 minutes.
13

10
HMD8 DSP/
USER’S MANUAL
5. CONNECTIONS
HMD8 DSP can be turned on/off by connecting the REMOTE IN terminal with a Remote Out signal coming from an
after market audio source. When it is on the logo is white.
WARNING: select the version of the HMD8 DSP (12 V or 24 V) which has the same power supply voltage as
the battery installed on the vessel.
How to turn HMD8 DSP on and off
MEMORY SELECTION SWITCH
Memory 3
Memory 1
Memory 2
TOP WIEW
BOTTOM WIEW
36
25
14
7
8
1CTRL2
3CTRL1
2
HMD8 DSP
01
2
3
4
5
6
7
USB
PRESETS OPTICAL IN
SUB OUTCTRL SPEAKER IN PRE IN
DRC
UPGRADE
OFF ON
SPEAKER OUT
FUSE x 2
POWER
(Not provided)
Max 20 cm / 7.9 in.
15 mm / 0.6 in.
8 AWG Max
HMD1
VOL
SEL
REMOTE OUT
pink CONTROL 1
blue REM IN
blue/black REM OUT
REM IN
EXTERNAL SUBWOOFER
AMPLIFIER (Optional)
HEX KEY 2,5 mm
HEAD UNIT
brown CONTROL 2
(see sec. 5.2)
5
5.1 POWER SUPPLY AND REMOTE TURN ON
to memory
selection switch