Hertz ML 280 User manual

www.hertzaudiovideo.com
SYSTEM
MLK 2
MLK 3
www.hertzaudiovideo.com
COMP
ML 280
ML 500R
ML 1600
M ANUALE DI ISTRUZIONI
O WNER ’ S MANUAL
62018 Potenza Picena (MC) Italy - Tel. [phone] - Fax [phone] - www.elettromedia.it
28 28 - 128
-- - 6
3,0 3,0 7,5 3,1
930 1100 370 71
0,78 0,98 - 0,67
0,04 0,05 - 0,11
- - - 6,82
- - - 17,1
- - - 0,29
- - - 7,23
0,40 1,21 - 0,41
0,90 1,96 - 0,44
0,72 3,14 - 5,46
91 91 93 93
ML 280 ML 280 ML 500R ML 1600
D
mm
Xmax
mm
Re
ohm
Fs
Hz
Le
mH@1kHz
Le
mH@10kHz
Vas
lit
Mms
gr
Cms
mm/N
BL
T-m
Qts
Qes
Qms
Spl
dB
big chamber small chamber
Electro - Acoustic parameters
05.1

Dear Customers,
Our compliments for purchasing a product of HERTZ MILLE line. Your satisfaction is the
first requirement our products must meet, the same satisfaction as that of those who long
for the emotion of car audio. If correctly installed, this component will give you extraordinary
listening pleasure. Please carefully follow the instructions you will find in this manual in order
to exploit these speakers qualities at best. In order to build high quality hi-fi car systems,
you need to know the cars mechanic and acoustic problems well; if you think not to have
the right tools or the necessary experience, please contact a specialised installer.
A state-of-the-art installation will insure you thrilling performances without affecting your car
safety and reliability.
Caution
HERTZ MILLE SPEAKERS CAN GENERATE VERY HIGH UNDISTORTED SOUND
PRESSURE. LONG EXPOSURE TO EXCESSIVELY HIGH SOUND PRESSURE LEVEL
MAY DAMAGE YOUR HEARING; THEREFORE, PLEASE USE COMMON SENSE AND
PRATICE SAFE SOUND.
Safety must be at the first place while driving; you should always be able to hear the noise
generated by your car or coming from the outside, in order to promptly face possible
emergency situations.
Recommendations
HERTZ MILLE speakers were designed to integrate their acoustic response with the latest
cars compartment response; therefore, they are perfectly suitable to customised, complex
installations.
Let us remind you that the speaker is not a complete element: the system it is used into,
the way it is installed and the system tuning will directly affect acoustic performances and
reliability. The speaker warranty is void if the product is used in wrong or improper ways.
You will find some useful tips in this manual; please contact your dealer for any doubts.
Italiano
Introduction
Gentili clienti,
complimenti per aver acquistato un prodotto HERTZ MILLE. La vostra soddisfazione è il primo
requisito cui devono rispondere i nostri prodotti; la stessa soddisfazione di chiunque voglia vivere
l’emozione del car audio. Il componente, correttamente installato, sarà in grado di regalarVi
momenti di straordinario piacere d’ascolto. Vi preghiamo di seguire attentamente le istruzioni del
manuale, in modo da poter sfruttare appieno le qualità di questi altoparlanti. La realizzazione di
sistemi hi-fi car di alto livello richiede una buona conoscenza delle problematiche meccaniche ed
acustiche delle autovetture; qualora riteneste di non avere gli attrezzi necessari o l’esperienza
richiesta non esitate a contattare un installatore specializzato. Un’installazione a regola d’arte Vi
assicurerà prestazioni entusiasmanti e coinvolgenti, senza influire sulla sicurezza e l’affidabilità
della Vostra autovettura.
Atten
z ione
GLI ALTOPARLANTI HERTZ MILLE SONO IN GRADO DI GENERARE ELEVATISSIME
PRESSIONI SONORE INDISTORTE, MA RICORDATE CHE PROLUNGATE ESPOSIZIONI AD
UN LIVELLO ECCESSIVO DI PRESSIONE ACUSTICA POSSONO PRODURRE DANNI AL
VOSTRO UDITO; UTILIZZATE DUNQUE EQUILIBRIO E BUON SENSO NELL’ASCOLTO.
La sicurezza durante la marcia deve restare sempre al primo posto, in ogni situazione dovreste
essere in grado di udire i rumori esterni e quelli del vostro veicolo per affrontare prontamente
situazioni di emergenza.
Suggerimenti
Gli altoparlanti HERTZ MILLE sono stati progettati per integrare la propria risposta acustica con
quella degli abitacoli delle moderne autovetture e si prestano alla perfezione ad installazioni
personalizzate e complesse. L'altoparlante, però, non può essere considerato come un
elemento finito: l'impianto in cui verrà inserito, le modalità di installazione e la taratura del
sistema saranno dunque determinanti per le prestazioni acustiche complessive e l'affidabilità
dell’altoparlante stesso. Ogni utilizzo scorretto o non conforme del prodotto può causare il
decadimento della garanzia. Di seguito troverete delle indicazioni utili e nella maggior parte dei
casi esaustive; per ogni ulteriore dubbio rivolgetevi al vostro rivenditore di fiducia.
English

In 1999 HERTZ introduced MILLE speakers in the market. This revolutionary series was
designed in order to get extraordinary performance and meet the needs of the most demanding
enthusiasts with state-of-the-art components.
These speakers set new standards in sound reproduction, they were appreciated by the public
and obtained valuable awards by the most important juries, like ECAP prize for HSK 1600,
elected the best loudspeakers system in the year 2001-2002. The products innovation and
continuous development have always characterised HERTZ research program. HERTZ R&D
team has now managed to improve what seemed to be already perfect.
We believe that MILLE speakers will be able, once again, to set higher quality standards of
music reproduction in cars, and that enthusiasts worldwide will have the chance to love their
utmost quality.
Passion urges us to look for extreme products, whose fundamental feature is total quality,
without compromises.
Living and working in the service of sound.
ML 280
ML 500R
ML 1600
MLCX 3
griglia
MLCX 2
ML 1600
Technology
English

Designed by man
MILLE line components membranes were designed according to the most innovative FEM
softwares (FEM: Finished Elements Modelling) and tested through prototypes, measurements
and technical listening. This process permits to control every step of the project and to
constantly check its evolution.
ML 280 dome has a special profile, exclusively designed by HERTZ: its first section is
hemispheric, the top is hyperbolic. The relation of emitting diameter, membrane height and
surround profile ensures very low Fs without affecting dynamics at mid-high frequency. The
component dispersion is flat also at extreme off-axis response and at ultrasonic frequencies.
ML 1600 “V” CONE has a totally new, HERTZ proprietary exponential geometry. Its contact point
with mobile voice coil uses a very light paper support, which optimises mechanical coupling and
insures very high efficiency. This new geometry provides very flat off-axis response, up to so-far
unbelievable frequencies for a component with this diameter, no break-up phenomena and
optimal damping, for rich, accurate sound in the whole bandwidth.
Membrane profile
ML 280
Membrane profile
ML 1600
Created by nature
Cotton-injected paper fiber, natural resin imbued Tetolon®.
The materials used for ML 1600 midbass and ML 280 tweeter membranes are created by nature
and treated according to processes perfected in decades. In HERTZ laboratories, tradition
supports innovation.
For ML 1600 cone construction we realised, analysed and studied more than 35 materials,
different in terms of paper fibers composition and impregnating components. The mixture we
selected ensures good stiffness, damping and lightness. No other rigid fiber, composite material
sandwich or metal mould can provide such natural, accurate, dynamic sound.
The fiber we used for ML 280 membrane is a mixture of cotton and silk, in controlled
percentage; together with the natural resin impregnating treatment, it makes the component go
beyond the audible range, like all stiff dome components (metal, rigid fibers) but without
generating the troublesome resonances which characterise this type of technology. The
diaphragm can, thus, vibrate at very high frequencies without coloration and without affecting or
spoiling sound.
Technology
English

The magnet of a long excursion midwoofer has to comply with various important parameters,
some of which may be in contrast with the others. You need to be able to wisely mix different
technical solutions and thoroughly examine every choice, carefully considering pros and cons.
Magnetic flux symmetry around the gap, field intensity and width, mobile voice coil inductance
modulation, compactness and lightness: these are some of the fundamental features to get
state-of-the-art performance.
Plates employ the same ferromagnetic material designed for ML 280 tweeter, with high saturation
level; they are machined through high precision process, through numerical control equipment.
The magnet geometry generates a perfectly linear induction field, up to mobile voice coil extreme
excursions. The flux reaches a value which was inconceivable a few years ago: 1.2 Tesla in the
midbass gap, with 36 mm diameter voice coil, ensure bursting dynamics, very high efficiency,
very good dissipation.
ML 1600 Magnet FEM simulation
ML 1600 motor core is a new sized neodymium ring,
especially moulded for this component. This material
uses an innovative rare earths mixture which provides
total thermal stability.
Neodymium Magnet
ML 1600
Magnet section
ML 1600
The design and development of MILLE components magnets employed advanced FEM
(Finished Elements Modelling) technology. Little differences in the magnetic structure can
enhance musical and acoustic performance. In HERTZ laboratories, every detail is carefully
analysed and assessed.
When designing the magnet of a tweeter, it is important to concentrate energy in a limited area
around mobile voice coil. The mechanical excursion of this component is very limited but
accelerations speed is very high. For mobile voice coil very good control, you need to have high
magnetic induction in the gap and to use first-grade ferromagnetic materials. ML 280 tweeter
employs uses high thermal threshold, REN®neodymium double magnet and very low carbon
percentage iron, especially designed for it. The magnet geometry creates a 1.6 Tesla induction
field, with perfect lines symmetry.
Magnet detailed drawing
ML 280
Technology
English
ML 280 Magnet FEM simulation

The load seen by the tweeter dome rear part affects the tweeter performance, as it occurs to a
midrange or a big diameter woofer. Traditional geometry creates asymmetric movement because
the membrane can “see” a free space in the front, while there is a rear load due to the very small
volume between central pole and dome.
We designed eight vents in ML 280; they ensure a resonance-free matching with the rear damping
chambers. The volumes and vents size, as well as the special absorbing material, provide mobile
voice coil with optimal damping, generating natural, clear, dynamic sound. We put a different type
of acoustic material under the dome; it is thicker and more efficient at high temperatures and it
traces the membrane rear profile. This eliminates all remaining resonances and provides very
detailed, natural trebles.
ML 280 resonances
Traditional tweeter resonances
Section
ML 280
The elaboration of an advanced set of dynamic measurements pointed out a determinant factor,
usually ignored by most manufacturers. Mobile voice coil inductance modulation, derived from the
winding interaction with central pole and gap, seems to generate the biggest second harmonics
distortion. When the component excursion gets bigger than the voice coil height, there is an
interference which heavily affects FFT (Fourier Transfert Function), causing strong intermodulation.
ML 1600 magnet geometry, together with central pole complete shielding through a pure copper
plate, provides exceptionally constant parameters even with high power in the input and at long
excursions.
You can listen to totally controlled, accurate musical signal even with very high sound pressure and
to firm dynamics in whatever conditions.
When designing these drivers, we focused on installation versatility in order to have light speakers,
sized according to international standards. By easing installation, we give you the chance to get
extraordinary performance also in difficult conditions, without having to modify cars interiors.
These are very high quality components, whith thrilling look and very easy to use.
VOICE COIL DISPLACEMENT
+10mm
CENTERED VOICE COIL VOICE COIL DISPLACEMENT
-10mm
0
8
16
24
32
40
Center /-10 mm
displacement
+10 mm
displacement
0
8
16
24
32
40
Center
-10 mm
displacement
+10 mm
displacement
Traditional woofer ML 1600
Technology
English

ML280 signature
Parameters selection and quality control are very important to HERTZ production. Every
component is subjected to several quality controls along the whole production line and it is then
selected according to strict criteria and very small tolerances.
To satisfy the needs of the most demanding enthusiasts, HERTZ worked out a very precise,
selective matching process for ML 280 tweeters.
ML 280 Signature components are chosen at the end of the production process through an
analysis which evaluates their performance in the domain of time and of frequency. The data are
recorded in a special database which analyses their performance and couples the pieces
according to their serial number.
The result is a packaging which contains a pair of identical tweeters, able to ensure state-of-the-
art performance in state-of-the-art systems.
Every element of a speaker contributes to sound reproduction. The basket supports mobile voice
coil and magnet and takes part in acoustic emission through its own vibrations and through the
reflections generated by its back arms. The mechanical resonances of a traditional basket, usually
between 800 and 1300 Hz (according to mass and stiffness), absorbe precious energy which
should be transferred only to the membrane.
ML 1600 basket is totally new and completely inert thanks to its self-
standing design and to the use of a light, damped aluminium
alloy. Its acoustic transparency is state-of-the-art and sound
is more natural, completely colorless and accurate.
The look of this speaker is incredibly thrilling and
innovative.
The same considerations and reflections made for ML 1600 new basket were made when
designing ML 280 housing and ML 500R face plate. The membrane is the only element of a
speaker which must play. Utmost attention was paid to the elimination of any resonance which
might spoil acoustic performance.
ML 280 whole structure is made of aluminium, milled through numerical control equipment, while
ML 500R face plate is made of first quality die-cast aluminium alloy.
These workings generate completely inert structures, allowing the membrane to change the
smallest, most delicate sound tones into acoustic energy.
ML 280
ML 500 R
Basket
ML 1600
Technology
English

ML 500R unique feature is its acoustic radiation dipolar typology.
The absence of a back load makes membrane work in maximum symmetry, with ideal damping.
Bass response is outstanding: Fs is only 370 Hz and this is an impressive value for such a
compact component; it makes its versatility and easy use unique.
110
0°
30°
0
8
16
24
32
40
Section of a traditional ribbon
component with monopolar emission.
Section of ML 500R
with dipolar emission.
Frequency Responce
ML 500R
Enthusiasts and professionals believe that ribbon speakers can ensure faster transients than
traditional cone drivers thanks to their very light mobile voice coil. What they do not consider is the
delicate relation among the induction in the gap, the length of the wire into the field and the
membrane mass.
ML 500R is one of the very few isodynamic ribbon speakers with push-pull motor section and
membrane/magnet innovative geometry.
The motor structure was designed to generate a
perfectly symmetrical magnetic field for eliminating
intermodulation distortions and concentrating very
high energy in the gap. You get a speaker with 6 dB
higher efficiency than a traditional component,
extraordinary dynamics and very high thermal
dissipation.
If you want to obtain the same pressure
you get with ML 500R (93 dB 1W/1m)
from a traditional speaker (87 dB 1W/1m),
you need to use a four-time
higher power.
Power/Efficiency Comparison
Detailed drawing
ML 500 R
Technology
English

When trying to have good quality listening in car, the main
problem you have to solve is the different distance of the two
stereo channels from the listening point. Both the driver and the
passenger who sit in the car have an average offset between
the two channels equal to about 25-35 cm. Because of this
difference, the sound of the farther channel is perceived 85 ms
later than the other. Human hearing does not consciously
distinguish this delay and cannot elaborate perceived sound in a
natural way, as if it came from the same source.
Used for the first time in a commercial system, TAD®(Time Alignment Device) circuit corrects the
speaker response in the time domain by inserting a selective delay in the acoustic response and
eliminating perception delay.
Imaging gets in the center of the dashboard and sound is natural, solid, real, accurate.
The possibility to select listening point according to three different configurations (driver, passenger, all)
in a few seconds is brand new and makes these crossovers suitable to every listening condition.
Another listening problem which derives from the CAR compartment asymmetry is the different
direction of the speakers of the two channels with regard to
the listening point. The biggest angulation of the channel
which is closer to the listener changes frequency response
according to surface and to membrane size.
HFC®(High Frequency Contour) system totally
superimposes the channels sound to the listening point.
Thanks to this technology and to TAD®, HERTZ MILLE
systems are completely different from all you have been
listening to so far.
ON
HFC®
OFF
+25/35 cm
MLCX TAD®Circuit
Speakers offset
Car is one of the most complex, difficult surroundings for musical reproduction. Every car
compartment has its special sound, demands specifically designed installation projects and involves
various problems: the relation between direct sound and reflected sound, the speakers position and
their distance and angulation with regard to the listening point. The solutions to these problems are
sometimes contrasting and difficult, they need expensive investments and complex installations.
When designing MILLE line speakers, HERTZ only aimed at state-of-the-art performance, without
any economic or structural compromises.
In order to achieve this goal, we designed cutting-edge speakers (in terms of technology, used
materials and acoustic parameters) and developed innovative crossovers in our laboratories; these
filters are extraordinary both in terms of construction and of performance.
The crossover is the heart of every loudspeakers system, it is the device which handles the response
of every component for generating the system sound, the air vibrations in the listening environment.
Frequency response, phase response, interactions among the single components and between the
latter and the listening environment. Components sonic accuracy, interaction easiness and versatility,
reliability. MILLE line new systems have unique crossovers, with very precise, efficient equalisers and
time correction devices, derived from HERTZ engineering staff's long experience.
MLCX 3
MLCX 2
Technology
English

The possibility to choose among different configurations and MILLE crossovers extreme
versatility forced us to design a switching system easy to use, with long-term reliability, which
could provide first-grade contact. The EJ's, Easy Jumpers, are naturally ergonomical and ensure
colorless acoustic performance.
Crossovers are often the core of spectacular installations. We therefore designed a chassis which
combines vibrations rejection, finishings resistance and thrilling look.
Your eyes can enjoy the filters die-cast aluminium central chassis, their transparent perspex top
cover, the connections controls Shiny finishing, as well as the patient, careful assembly of the
internal components. They are wondeful to look at, as well as extraordinary to listen to.
Manufacturing and components quality is very important. In HERTZ laboratories, we doubted
about every acquired certainty and reconsidered every component as if it were the first time, in
order to set new standards. We measured, listened to, compared the most valued components.
The wonderful Quadralitz inductors used in woofers and midranges crossover networks
provided dynamic, natural, mellow sound.
The polypropylene capacitors, selected among various components manufactured through
different technologies and materials, proved to perform excellently, gaining their place in the
crossovers circuit board.
When we tested the resistors attenuation and damping, we realised there were none in the
market which could meet the best quality standards. Every wire resistor, even the ones wound
with anti-inductive technology, generates an unreal inductance which causes an audible shifting
in the audio range. Metaloxide resistors don't have this problem but are less efficient in
dissipating heat because of their mechanical nature.
To have the best sound and HERTZ products typical reliability, we therefore developed a
special, innovative device which uses three resistors in parallel, with an aluminium heat sink able
to provide unbelievable thermal delta.
The device total dissipation is higher than 25 W.
TR®Triple Resistor Heat Sink
Technology
English

ML 1600 mounting
- Make sure the screws holes are well drilled.
- When you use the grille, its support must be installed betwen baffle and speaker basket.
- Mind baffle and speaker mechanical coupling. Whenever it is possible, put the gasket between
them and eliminate possible air leakage in the basket sides, since it might cause acoustic short
circuit, negatively affecting the system performance.
- We recommend to insulate the doors where the speakers are installed whenever complex
systems are built or very high powers are used.
- Damp metallic and plastic surfaces vibrations with FONOMAT panels or with the special
FONOGEL 100 by AZ audiocomp. Insulate wires and mechanic parts through FONOSEAL 100
mastic.
Factory cut-out mounting
Door mounting
Installation patterns
When installing MILLE Comp speakers, we suggest that you care for some details:
- In order to ensure the best sound, the speakers of every channel
(Left and Right) should be placed one as far as possible from the
other, be they mounted on front doors, on dashboard or on rear deck.
- Use the tweeter with a hi-pass crossover, whose cut-off frequency
must not be lower than 1.8 kHz, with 12 dB/Oct. slope.
- Install the tweeters in order for their emission axis to cross in the car
compartment center.
- Tweeters should be mounted as high as the
listeners' face and be as far as the woofer is from it.
It is usually good to install them in the rearview mirror
triangle or on the windscreen pillar.
- Fix speakers with all
the screws given with them, gradually
and simultaneously fastening them.
Installation Patterns
English

When installing ML 500R in the dashboard, place the components as indicated in the drawing. In
this configuration, the two midranges use the dashboard reflections in order to create a balance
between direct sound and reflected sound. Sound is natural, thrilling; you have very good tonal
accuracy and separation between the channels.
Use the template given with the speaker to draw the cut profile on the mounting surface.
Fasten the screws given with the speaker grdually and simultaneously.
Dashboard mounting
How to use the template
ML 500R mounting
ML 500R dispersion has a wider off-axis
response diagram along the horizontal
axis.
In order to enjoy the extraordinary acoustic features of this component at best, we suggest you
follow some rules when installing it.
If your doors allow it, install ML 500R as
indicated in the drawing, aligned with woofer
and tweeter and with its horizontal emission
axis oriented towards the listeners' ears.
If you install the components in the rear deck,
place them as indicated in the drawing and set the
two HFC®controls on ON. In this configuration,
the system uses the rear deck reflections to create
a balance between direct sound and reflected
sound. Sound is natural, thrilling; you have very
good tonal accuracy and separation between the
channels.
50
30° on Horizontal Axis
30° on Vertical Axis
ON OFF
HFC®
Door mounting
Parcel shelf out-outs
Caution
Disconnect the system before changing the jumpers position in the printed circuit board.
Installation Patterns
English

Below you can find an easy diagram with some filter network typologies for standard crossover
frequencies. The diagram and the values have been exclusively designed for ML 280 tweeter. Let
us remind you that the tweeter filter must be integrated with the midwoofer one in order to get
smooth, regular response. Therefore, this filter must be always implemented according to the
whole project, rather than be considered an absolute reference in complete systems.
0 dB
-5 dB
-1.5 dB
-3 dB
-4 dB
-6 dB
R 1
R 2
R 3
R 4
R 5
C 1 R 6
L 1
ML 280
3,9
3,9
3,9
3,9
3,9
3,9
3,9
3,9
4,7
4,7
4,7
4,7
4,7
4,7
4,7
4,7
1
1
1
-
1
1
1
-
10,0
6,8
4,7
2,2
12,2
6,8
4,7
2,2
0,33
0,22
0,22
0,15
0,47
0,33
0,22
0,15
2,7
2,7
2,7
2,7
2,7
2,7
2,7
2,7
1,8
1,8
1,8
1,8
1,8
1,8
1,8
1,8
1
1
1
1
1
1
1
1
2000 Hz
2800 Hz
3500 Hz
5000 Hz
1800 Hz
2500 Hz
3500 Hz
5000 Hz
Components Cut-off R1 R2 R3 R4 R5 R6 C1 L1
frequency ohm ohm ohm ohm ohm ohm uf mH
Caution
- Don't remove the damping material which is inside the two chambers.
- Don't remove the grille from the tweeter back.
Chambers mounting
Electrical diagram
ML 280
Small Chamber
ML 280
Big Chamber
ML 280 mounting
ML 280 tweeters have two acoustic chambers, which can be easily, quickly removed and
interchanged. This technical solution can optimise the performance of every type of installation.
The tweeter can be used in different configurations since it is possible to choose the best Q for
one's system by changing the rear acoustic chamber. The chambers simulate sealed box
configuration and they are filled with natural, non-woven absorbing material for the component
best damping. The Small Chamber increases Q factor and makes the tweeter slope sharper; the
Big Chamber makes slope smoother at lower frequencies.
Small Chamber Big Chamber
Small Chamber solution optimises
sound when installation occurs in thin
locations.
Big Chamber solution insures the flattest
mid-frequency response and more
damping when installation occurs in
bigger locations.
Flush mounting
- Fix the housing from behind through the
metallic ring given with it.
Installation Patterns
English

OTHER
CHANNEL
OTHER
CHANNEL
MONOBI
TW LEVEL
-4,5 dB
-3 dB
0 dB
-1,5 dB
Bi-Wiring
MLCX 2
Set TW Level controls on 0 dB
and adjust emission level
through the proper amplifier
Caution
OTHER
CHANNEL
MONOBI MONOTHREE
Mono-Wiring
MLCX 3
Electric
connection
in phase
Connectors
Connectors must be connected according to the right polarity. Positive pole is indicate by “+”
and by a red point on the speaker terminals.
CAUTION The connection phase of all the components determines acoustic results. Make sure
all connection phases are right, as from instructions.
MILLE line crossovers were designed to allow single amplification and multi-amplification. You
can make the filter functioning suitable to different types of installation simply by moving some
switches. Thanks to MILLE systems multi-amplification, you will get very high SPL systems, with
bursting dynamics.
Caution
Disconnect the system before changing the jumpers position in the printed circuit board.
OTHER
CHANNEL
MONOBI
Mono-Wiring
MLCX 2
Installation Patterns
English
Electric
connection
out of phase

Connections in series - in parallel
Below, please find some examples of connections: single, in parallel, mixed.
Choosing your cables
Power cables are extremely important since they directly affect the system damping factor
and sound quality; in the table below, we show cable diameter, which we recommend
according to length and applied power.
Applied power
Cable diameter
Connection length
The table refers to continuous
power with 4 Ohm load. If
load decreases, the cable size
needs to be proportionally
increased.
Caution
Disconnect the system before changing the jumpers position in the printed circuit board.
OTHER
CHANNEL
OTHER
CHANNEL
MONOBI MONOTHREE
MID LEVEL
-4,5 dB
-3 dB
0 dB
-1,5 dB
OTHER
CHANNEL
OTHER
CHANNEL
OTHER
CHANNEL
MONOBI MONOTHREE
MID LEVEL
-4,5 dB
-3 dB
0 dB
-1,5 dB
TW LEVEL
-4,5 dB
-3 dB
0 dB
-1,5 dB
Bi-Wiring
MLCX 3
Tri-Wiring
MLCX 3
Set MD Level controls on 0 dB
and adjust mid-high speakers
emission level through the
proper amplifier
Caution
Set MD Level and TW Level
controls on 0 dB and adjust
emission level through the
proper amplifiers
Caution
Installation Patterns
English

How to use TW Level and Mid Level controls
TW Level and Mid Level controls offer a control dynamic range of the tweeter pressure level
equal to 4.5 dB. We recommend you set the control point on the central position, on -3 dB, if
the tweeters are installed in the rearview mirror triangle or on the windscreen pillar and if the
midrange is installed in the dashboard.
If the tweeters are installed in the dashboard or in the doors and the midrange is installed in the
doors, set the control point on -1.5 dB.
Set EJ's according to your personal taste and to the music you listen to.
MID LEVEL
-4,5 dB
-3 dB
-1,5 dB
0 dB
TW LEVEL
-4,5 dB
-3 dB
-1,5 dB
0 dB
TW LEVEL
-4,5 dB
-3 dB
-1,5 dB
0 dB
TW Level
MLCX 2
MID-TW Level
MLCX 3
Caution
Disconnect the system before changing the jumpers position in the printed circuit board.
Tuning
After installing the speakers in your car and checking all connections, you need to spend some
time to tune your system, calibrate your amplifier (if you have one) and adjust TAD®Time
Alignment Device and HFC®controls.
If used, the amplifier gain level should be adjusted in order to keep power in a linear functioning
area, without distortion or saturation which might damage the speaker. If the amplifier has a
distortion-detecting device, adjust gain in order for the indicator to switch on only with signals
peak, with the source volume set at three quarters of its range.
MILLE speakers have full, flat response and
don't need any equalisations which might cause
the amplifier saturation or distortion. Avoid to use
loudness or excessive equalisation. If you adjust
frequency response of +3 dB, the amplifier
should supply doubled power in the range you
want to change; this increases the risk of
distortion.
If possible, use the subsonic filter setting cut-off frequency around 25 Hz.
Lower regulated gains
Flashing leds on signal peaks
Amplifier in linear
functioning area
OK
NO
Maximum gain
Leds always on
Distorted amplifier
Flat
Loudness
Tuning
English

Driver alignment
If the two bridges of the left crossover are set on TAD In/HFC In and the ones of the right
crossover are set on TAD Off/HFC Off, the left channel response is improved with regard to
extension, sensitivity, phase and you get the same FFT as the right channel one. The sound
image the driver perceives is in the center of the virtual stage; tonal accuracy gets colorless,
clearer.
TAD Bypass TA D Bypass
HFC
ON OFF
Caution
Disconnect the system before changing the jumpers position in the printed circuit board.
TAD Bypass TA D Bypass
HFC
ON OFF
Driver's side crossover Passenger's side crossover
TAD®Time Alignment Device
In standard installations, the different position of Left and Right channels with regard to the
listening point changes the width and the phase of the perceived signal. You lose energy at high
frequencies and the mid-frequency is slightly altered, too: sound is therefore unclear, as well as
image is.
TAD/HFC on
TAD/HFC off
30° 45°
30° 45°
Tweeter angulation Woofer angulation
+25/35 cm
Speakers offset
Tuning
English

ALL alignment
If the bridges of both crossovers are set on TAD Off/HFC Off, listening is enhanced for everybody
in the car, providing flat frequency response and balanced, colorless imaging.
HFC control can be set in different positions, according to the music you listen to and to your
taste.
If it is on On, you get clearer high frequency response; if it is on Off, sound is more natural.
TAD Insert TA D Insert
HFC
ON OFF
Caution
Disconnect the system before changing the jumpers position in the printed circuit board.
TAD Insert TA D Insert
HFC
ON OFF
Driver's side crossover Passenger's side crossover
Passenger alignment
The opposite occurs for the passenger. If the two bridges of the right crossover are set on
TAD In/HFC In and the ones of the left crossovers are set on TAD Off/HFC Off, the right channel
response is improved with regard to extension, sensitivity, phase and you get the same FFT as
the left channel. The sound image the passenger perceives is in the center of the virtual stage;
tonal accuracy gets colorless, clearer.
TAD Insert TA D Insert
HFC
ON OFF
Caution
Disconnect the system before changing the jumpers position in the printed circuit board.
TAD Bypass TA D Bypass
HFC
ON OFF
Driver's side crossover Passenger's side crossover
Tuning
English

ML 280
ML 500R
ML 1600
MLCX 3
griglia
Nel 1999 HERTZ ha introdotto sul mercato la rivoluzionaria linea MILLE, progettata per ottenere
prestazioni eccezionali e soddisfare componenti di assoluto riferimento la richiesta degli
appassionati più esigenti.
Questi altoparlanti hanno stabilito un nuovo standard nella riproduzione del suono, riscuotendo un
entusiastico apprezzamento del pubblico e prestigiosi riconoscimenti delle giurie più importanti,
come il premio ECAP per l’HSK 1600, miglior sistema di altoparlanti dell’anno 2000-2001.
L’innovazione, lo sviluppo continuo dei prodotti sono da sempre punti di riferimento del programma
di ricerca HERTZ. Oggi il team R&D HERTZ è riuscito nell’impresa di migliorare ciò che
sembrava già perfetto.
Siamo certi che la linea MILLE saprà ancora una volta innalzare lo standard della riproduzione
musicale in auto, e che gli appassionati in tutto il mondo potranno apprezzare l’assoluta qualità
di questi altoparlanti.
La passione ci spinge alla ricerca di prodotti estremi, dove l’unico requisito di fondo è la qualità
assoluta, senza alcun tipo di compromesso.
Al servizio del suono.
MLCX 2
ML 1600
Italiano
Technology

Creati dalla natura
Fibra di cellulosa con iniezione di cotone, Tetolon®impregnato in resina naturale.
I materiali utilizzati per le membrane del mediobasso ML 1600 e del tweeter ML 280 sono creati
dalla natura e vengono trattati secondo processi affinati nel corso di decenni. Nei laboratori
HERTZ la tradizione supporta la forza dell’innovazione.
Per la realizzazione del cono dell’ML 1600 sono stati realizzati, analizzati e valutati più di 35 materiali
diversi per composizione delle fibre di cellulosa e materiali impregnanti. L’impasto selezionato
presenta ottimali caratteristiche di rigidità, smorzamento e leggerezza. Nessuna fibra rigida,
sandwich di materiale composito o stampo metallico è in grado di offrire un tale livello di
naturalezza, accuratezza e dinamica del suono.
La fibra utilizzata per la membrana dell’ML 280 è un impasto di cotone e seta in percentuali
controllate che, unitamente al trattamento impregnante in resina naturale, produce un’estensione
in banda ultrasonica tipica dei componenti a cupola rigida (metallo, fibre rigide) senza generare le
fastidiose risonanze che caratterizzano questo tipo di tecnologia. Il risultato è un diaframma in
grado di vibrare a frequenze altissime senza emettere alcun tipo di colorazione indesiderata,
rispettando il segnale musicale nella sua piena complessità.
Disegnati dall’uomo
Le membrane dei componenti della linea MILLE sono state sviluppate mediante utilizzo dei più
avanzati software di modellazione a elementi finiti (FEM) e testate mediante prototipazione, misure e
ascolto tecnico. Questo processo permette di controllare ogni stadio del progetto e di verificarne
costantemente l’evoluzione.
La cupola dell’ML 280 segue un profilo molto particolare ed esclusivo HERTZ: emisferico nella
prima sezione, iperbolico verso la sommità. Il delicato rapporto tra diametro di emissione, altezza
della membrana e profilo della sospensione consente di ottenere una frequenza di risonanza molto
bassa senza influire sulla dinamica in gamma medioalta. La dispersione del componente risulta
regolarissima anche ad angolazioni accentuate e frequenze ultrasoniche.
Il nuovo “V” CONE dell’ML 1600 ha uno sviluppo esponenziale del tutto inedito e proprietario
HERTZ. Il punto di contatto con la bobina mobile utilizza un leggerissimo supporto in cellulosa, che
ottimizza l’accoppiamento meccanico e il raggiungiumento di altissimi valori di efficienza. Con questa
nuova geometria si ottiene una dispersione regolarissima sino a frequenze impensabili per un
componente di questo diametro, una totale esenza da fenomeni di break-up e lo smorzamento
ottimale, per un suono ricco e preciso in tutta la banda passante.
Profilo membrana
ML 1600
Italiano
Technology
Profilo membrana
ML 280