Amate Audio NITID N208P User manual

User’s manual
December 2018

NITID N208 Dec 2018
2Amate Audio
Safety Instructions
1. All safety instructions must be read before using this device.
2. Keep and follow these instructions
3. Heed all warnings
4. The exclamation mark in the triangle indicates internal components which if
replaced can affect safety.
5. The lightning symbol within the triangle indicates the presence of dangerous
uninsulated voltages.
6. Only clean the device with a dry cloth.
7. Do not block any ventilation openings. Install in accordance with the
manufacturer’s instructions.
8. Do not install the device near heat sources such as radiators, heaters or other
heat-emitting elements.
9. Protect the power cord from being walked on or pinched, particularly at plugs,
convenience receptacles, and the point where they exit from the apparatus
10. The equipment must be repaired by qualified technical service personnel when:
A. The mains supply cable is damaged, or
B. Any object or liquid has damaged the device; or
C. The equipment does not function normally or correctly; or
D. The equipment has been exposed to the rain; or
E. The chassis is damaged
11. Disconnect the device in the case of electric storms or during long periods of
disuse.
12. WARNING – To reduce the risk of fire or electric shock, do not expose this
device to rain or moisture
13. The equipment shall not be exposed to dripping or splashing and no objects filled
with liquids, such as vases, shall be placed on the device.
14. For hanging and installation, use manufacturer recommended accessories only.

NITID N208 Dec 2018
3Amate Audio
1 INTRODUCTION
1.1 General
Amate Audio would like to thank you for your confidence in our NITID Series. We
suggest you to carefully read the following instructions in order to obtain the best
results in performance.
1.2 What is a line array?
The trend in sound reinforcement has been to increase both the sound pressure
level (SPL) and the size of the audience to be covered. This leads to an increase in
the number of cabinets and, as a result of this, an increase in the total size and
weight.
A line array is a group of independent sound sources which are vertically stacked in
order to transform the spherical wavefronts generated by individual sources into a
single flat wavefront.
Fig. 1. Wavefield interference for different wavefronts.
To carry out effectively arraying individual sound sources the system must follow the
acoustic coupling conditions based on the wavelength, the shape of each source, the
surface area of each transducer and the relative source separation.
An assembly of individual sound sources arrayed with regular separation between the
sources on a plane or curved continuous surface is equivalent to a single sound
source having the same dimensions as the total assembly if the following conditions
are fulfilled:
1) The step of source separation, defined as the distance between the acoustic
centres of the individual sources, is smaller than half the wavelength over the
bandwidth of operation.
d<= /2
It is not difficult to fulfil this first condition for the low and mid frequencies. For
example, two 7" loudspeakers that are separated by 17 cm will reproduce a cylindrical
wave up to 1015 Hz.
This condition is difficult to be fulfilled for the high frequencies, as their wavelengths
are too small to make the adjacent acoustic centres any smaller than /2. Here comes
the second "arrayability" criterion.

NITID N208 Dec 2018
4Amate Audio
2) The wavefronts generated by the individual sources are planar and the combined
surface area of the sources fills at least 80% of the total target surface area:
H1·W + H2·W+.....+Hn·W >=0.8·H·W
This is achieved by using waveguides, which are coupled to the compression drivers
output. We achieve flat wavefronts with a constant phase. By vertically assembling
these waveguides we fulfil the second criterion of line array construction.
Fig. 2. Second criterion of "arrayability"
3) The deviation from a flat wavefront must be less than λ/4 at the highest operating
frequency (this corresponds to less than 5 mm curvature at 16kHz).
This third condition can be
explained through our property
waveguide. Thanks to some
complex mathematical
calculations we have obtained a
component which is able to
adapt the circular section of the
compression driver to a
rectangular section, getting on-
phase waves at the end of the
guide. This flat wavefront is ideal
for vertical configurations.
Fig. 3. High frequency waveguide (half piece)
Sound engineers use line arrays to obtain narrow directivities on the vertical plane.
For configurations with many cabinets (big height) and at high frequencies it is not
unusual to achieve narrow angles- in some cases they may be grade fractions. This

NITID N208 Dec 2018
5Amate Audio
can be useful in venues where both a high sound pressure level and long throw are
required; nevertheless, this means less coverage of the audience area.
It is sometimes useful to achieve an asymmetrical coverage pattern on the vertical
plane, which can be obtained by aiming some of the cabinets through their hinging
points. We are now ready to define the last two criteria of "arrayability".
4) For curved arrays, the tilt angles should vary in inverse proportion to the listener
distance (this is geometrically equivalent to shaping variable curvature arrays to
provide equal spacing of individual element impact zones).
5) There are limits given the vertical size of each cabinet and their relative tilt angles.
In our case the maximum tilt angle (between cabinets) is 10º.
Fig. 4. Tilt angle between cabinets (10º maximum)
1.3 Fresnel Region (Near Field) and Fraunhofer Region (Far Field)
As our system is able to fulfil the previous conditions it will produce cylindrical waves
to a maximum frequency. The wave will be flat up to a certain distance where it will
start to become spherical (depending on the frequency and the size of the array).
The limit distance between the zone of cylindrical waves (Fresnel) and spherical
waves (Fraunhofer) can be calculated through the following formula
2
231
1
2
3







 Hf fHdc
where
dc= limit distance between near field and far field (in metres)
H = height of the array (in metres) f= frequency (in kHz)
In the near field region (Fresnel), the wavefront is cylindrical and waves only expand
on the horizontal plane (110º in N208). The height of the wavefront is, in this case,
the total height of the array.

NITID N208 Dec 2018
6Amate Audio
In the far field region (Fraunhofer), the wavefront is spherical and expands both on
the horizontal and vertical planes. The horizontal coverage is 110º and the vertical
coverage is defined by the frequency and the height of the array.
Fig. 5. Limits of Fresnel-Fraunhofer Regions
We can create a chart with some of the basic configurations and their performance
regarding wave propagation.
Frec
(Hz)
4x
N208
dc(m)
8x
N208
dc(m)
12x
N208
dc(m)
16x
N208
dc(m)
100
Esférica
Esférica
Esférica
1.3
125
Esférica
Esférica
0.7
2.2
250
Esférica
1.1
3
5.6
500
0.5
2.8
6.6
11.8
1k
1.4
5.9
13.3
23.8
2k
2.9
11.9
26.8
47.9
4k
5.9
23.9
54
95.9
8k
11.9
47.9
107.9
191.9
10k
14.9
59.9
134.9
239.8
Fig. 6. dcCalculation
An 8-cabinet array has a near field extending to 12 metres at 2kHz. Beyond this
distance the wavefront will be spherical.
In the first zone (Fresnel), sound pressure loss is only 3 dB per doubling of distance,
whereas in the second zone (Fraunhofer) the loss is 6 dB. In long throw and high
SPL configurations it is very important to produce cylindrical waves.

NITID N208 Dec 2018
7Amate Audio
Fig. 7.Cylindrical wave (A) vs Spherical wave (B)
(A): -3 dB / doubling of distance
(B): -6 dB / doubling of distance
1.4 Features and presentation
N208
- Self-powered acoustic system
- XLR electronically balanced input & XLR parallel output
- AC PowerCon input and link
- Speakon NL4FX output
- 1000 W Class-D amplifier for low-mid range
- 500 W Class-D amplifier for high range
- 24-bit AD/DA converters, 48 kHz sampling rate
- Self amplifier diagnostics: output power, temperature, clipping
- DSP Controls (delay, volume, PEQ, presets and limiter)
- 2 x 8" neodymium woofers with 2.5” voice coil
- 2 x 1.7” voice coil diameter, 1” exit PEN diaphragm compression drivers
- High frequency planar waveguide
- 110º horizontal directivity
N208P
- Passive acoustic system
- Speakon NL4MPR input
- AC PowerCon input and link
- 2 x 8" neodymium woofers with 2.5” voice coil
- 2 x 1.7” voice coil diameter, 1” exit PEN diaphragm compression drivers
- High frequency planar waveguide
- 110º horizontal directivity
N18W
- Self-powered subwoofer
- XLR electronically balanced input & XLR parallel output
- AC PowerCon input and link

NITID N208 Dec 2018
8Amate Audio
- 2500 W Class-D amplifier
- 24-bit AD/DA converters, 48 kHz sampling rate
- Self amplifier diagnostics: output power, temperature, clipping
- DSP Controls (delay, volume, PEQ, presets, polarity and limiter)
- 18” woofer with 4” voice coil
N218W
- Self-powered subwoofer
- XLR electronically balanced input & XLR parallel output
- AC PowerCon input and link
- 2500 W Class-D amplifier
- 24-bit AD/DA converters, 48 kHz sampling rate
- Self amplifier diagnostics: output power, temperature, clipping
- DSP Controls (delay, volume, PEQ, presets, polarity and limiter)
- 2 x 18” woofers with 4” voice coil
1.5 Presets on N208
The N208 includes several manufacturer presets for different types of application.
PRESET 1: 2BOX_FR
Two enclosures, full range
Fig. 8. Preset [2BOX_FR] configuration
PRESET 2: 2BOX_SW
Two enclosures with subwoofer
Fig. 9. Preset [2BOX_SW] configuration

NITID N208 Dec 2018
9Amate Audio
PRESET 3: 4BOX_FR
Four enclosures, full range
Fig. 10. Preset [4BOX_FR] configuration
PRESET 4: 4BOX_SW
Four enclosures with subwoofer
Fig. 11. Preset [4BOX_SW] configuration
PRESET 5: 8BOX_FR
Eight enclosures, full-range
Fig. 12. Preset [8BOX_FR] configuration

NITID N208 Dec 2018
10 Amate Audio
PRESET 6: 8BOX_SW
Eight enclosures with subwoofer
Fig. 13. Preset [8BOX_SW] configuration
1.6 Presets on N18W, N218W
The N18W and N218W include several manufacturer presets for different types of
applications.
ATTENTION: When the N18W or N218W are used in conjunction with the N208
NITID system in 2BOX_SW, 4BOX_SW or 8BOX_SW presets, the N18W and
N218W must operate in positive polarity.
When the N18W or N218W are used in conjunction with the N208 NITID system in
2BOX_FR, 4BOX_FR or 8BOX_FR presets, the N18W and N218W must operate in
negative polarity.
LPF80
80 Hz low pass filter
LPF80+3
80 Hz low pass filter
A) +3dB boost
at 50Hz (N18W)
B) +3dB boost
at 44Hz (N218W)

NITID N208 Dec 2018
11 Amate Audio
LPF90
90 Hz low pass filter
LPF90+3
90 Hz low pass filter
a 90Hz
A) +3dB boost
at 50Hz (N18W)
B) +3dB boost
at 44Hz (N218W)
LPF100
100 Hz low pass filter
LPF100+3
100 Hz low pass filter
A) +3dB boost
at 50Hz (N18W)
B) +3dB boost
at 44Hz (N218W)
LPF110
110 Hz low pass filter

NITID N208 Dec 2018
12 Amate Audio
LPF110+3
110 Hz low pass filter
A) +3dB boost
at 50Hz (N18W)
B) +3dB boost
at 44Hz (N218W)
LPF120
(only for N18W)
120 Hz low pass filter
LPF120+3
(only for N18W)
120Hz low pass filter
with +3dB boost
at 50Hz
CARD80/90/100/110/120*
(*120 only for N18W)
Cardioid polar pattern, with processing, delay
and inverse polarity
Fig. 14. Presets for N18W and N218W
2 CONNECTIONS
2.1 Connection Panel N208 and N208P
The power and audio connections are located on the unique panel, shown in Fig. 15
(N208) and Fig.16 (N208P). The different parts of the panels are explained in detail in
the following sections of the manual.

NITID N208 Dec 2018
13 Amate Audio
Control:
A) LCD: Displays information about the system status. The main screen shows the
following information.
Current preset
Input Level
Output Level LF Channel
Output Level HF Channel
Amplifier temperature
ALC mode enabled/disabled
ECO mode enabled/disabled
Keypad locked/unlocked
B) KEYPAD: Allows the user to perform basic operations on the DSP such as Preset
selection, audio settings and user preferences. There are three keys available:
MENU key: OK key: Circular key:
To enter the menu the keypad must be unlocked by pressing simultaneously the
MENU and OK keys.
The central circle of the circular key will light up in blue when this key is active.
C) PROTECTION LED: This led lights up when the amplifier is in a protection
situation (such as temperature excess, overcurrent, or other situations that can
compromise the amplifier’s integrity). It will also light up when the amplifier is in
standby mode. This happens for a couple of seconds at start-up.
The Protection led will light off when the amplifier recovers from the abnormal
situation. Shall the Protection led keep up lighted on even after a system restart,
please contact an authorized service.
D) LIMITER ON LED: The limiter led lights up to indicate that the amplifier is
delivering the maximum power set by the limiter circuit. The limiter prevents the
loudspeaker from receiving excessive or distorted signal. Continuous lightning of this
led indicates that the signal is being massively compressed. In this case, the input
level should be reduced in order to get a proper dynamic headroom.
Model Specifications:
E) MODEL DATA: The basic data of the model is found here:
- Model reference
- Amplifier program power (Watts)
- Maximum Sound Pressure Level Continuous delivered by the system (dB SPL)
F) AUTHENTICATION QR CODE: This QR code is a smart label that ensures that
the product is an original Amate Audio product. To verify the authenticity, please
follow the instructions in the following link:
http://www.amateaudio.com/en/product-authentication/
FLAT

NITID N208 Dec 2018
14 Amate Audio
Fig. 15. N208 control and connection panel
Fig. 16. N208P connection panel
Connections:
G) AC MAINS INPUT: Mains supply connection via PowerCon. Use the blue
connector for AC input.
Always use mains power cable supplied by manufacturer.
Never connect the NITID cabinets to an unearthed mains supply or by
using an unearthed mains cable.
A
B
C
D
E
F
H
G
I
J
K

NITID N208 Dec 2018
15 Amate Audio
H) AC LINK: Grey connector to feed other units in parallel. Linking up to 3 units is
possible, provided that a quality cable of a minimum section of 3x2.5mm2is used.
Connecting more than 3 units in parallel may lead to a voltage drop in the cable that
will reduce the equipment performance.
I) BALANCED INPUT/LINK: XLR-3 Female balanced signal connector for signal
input and XLR-3 Male connector for parallel connection of various cabinets with the
same input signal.
Please always use balanced microphone cable with the following pin
assignment:
1. Shield 2. (+) Live 3. (-) Return
J) SPEAKON OUTPUT TO N208P: 4P-Speakon output connector used to feed a
passive N208P Line Array Element. In order to assure proper operation always follow
these instructions:
Link up to ONE unit of N208P with each N208.
Do not connect a loudspeaker different than N208P to this output.
Do not change or manipulate this connector.
Always follow the polarity if the 4-pole connector
o1+/1-: LF+/LF-
o2+/2-: HF+/HF-
Misusing the slave output for N208P may lead to serious damage for all involved
equipment, and will not be covered by the warranty.
K) SPEAKON INPUT FROM N208 : 4P-Speakon input connector. Input signal
coming from N208 active cabinet.
PIN+1: POSITIVE LOW
PIN-1: NEGATIVE LOW
PIN+2: POSITIVE HIGH
PIN-2: NEGATIVE HIGH
WARNING: Respect the polarity +/-
2.2 Connection Panel N18W and N218W
The power and audio connections are located on the unique panel, shown in Fig.17.
The different parts of the panel are explained in detail in the following sections of the
manual.
Control:
A) LCD: Displays information about the system status. The main screen shows the
following information.
Current preset
Input Level
Output Level
Amplifier temperature
Polarity (+) or (-)
ECO mode enabled/disabled
FLAT

NITID N208 Dec 2018
16 Amate Audio
Keypad locked/unlocked
B) KEYPAD: Allows the user to perform basic operations on the DSP such as Preset
selection, audio settings and user preferences. There are three keys available:
MENU key: OK key: Circular key:
To enter the menu the keypad must be unlocked by pressing simultaneously the
MENU and OK keys.
The central circle of the circular key will light up in blue when this key is active.
C) PROTECTION LED: This led lights up when the amplifier is in a protection
situation (such as temperature excess, overcurrent, or other situations that can
compromise the amplifier’s integrity). It will also light up when the amplifier is in
standby mode. This happens for a couple of seconds at start-up.
The Protection led will light off when the amplifier recovers from the abnormal
situation. Shall the Protection led keep up lighted on even after a system restart,
please contact an authorized service.
D) LIMITER ON LED: The limiter led lights up to indicate that the amplifier is
delivering the maximum power set by the limiter circuit. The limiter prevents the
loudspeaker from receiving excessive or distorted signal. Continuous lightning of this
led indicates that the signal is being massively compressed. In this case, the input
level should be reduced in order to get a proper dynamic headroom.
Model Specifications:
E) MODEL DATA: The basic data of the model is found here:
- Model reference
- Amplifier program power (Watts)
- Maximum Sound Pressure Level Continuous delivered by the system (dB SPL)
F) AUTHENTICATION QR CODE: This QR code is a smart label that ensures that
the product is an original Amate Audio product. To verify the authenticity, please
follow the instructions in the following link:
http://www.amateaudio.com/en/product-authentication/
Connections:
G) AC MAINS INPUT: Mains supply connection via PowerCon. Use the blue
connector for AC input.
Always use mains power cable supplied by manufacturer.
Never connect the NITID cabinets to an unearthed mains supply or by
using an unearthed mains cable.

NITID N208 Dec 2018
17 Amate Audio
Fig. 17. N18W and N218W control and connection panel
H) AC LINK: Grey connector to feed other units in parallel. Linking up to 2 units is
possible, provided that a quality cable of a minimum section of 3x2.5mm2is used.
A
B
C
D
E
F
H
G
I
A
E
C
F
B
H
G
I
D

NITID N208 Dec 2018
18 Amate Audio
Connecting more than 2 units in parallel may lead to a voltage drop in the cable that
will reduce the equipment performance.
I) BALANCED INPUT/LINK:
XLR-3 Female balanced signal connector for signal input and XLR-3 Male connector
for parallel connection of various cabinets with the same input signal.
Please always use balanced microphone cable with the following pin
assignment: 1.Shield 2. (+) Live 3. (-) Return
2.3 Configurations
2.3.1 Parallel connection of 2 units N208
Connect the signal (mixing desk output) to INPUT on the active N208 unit. Use the
SPEAKON LINK output (“To N208P”) to transfer the INPUT signal to the passive
N208P unit. The active unit must be switched on. For the mains connection use the
cable with the blue Neutrik PowerCon NAC3FCA. Do not connect NITID active units
using PowerCon without earth.
Fig. 18. Connection of 2 units of N208 (signal and mains)
2.3.2 Parallel connection of 4 units N208
Connect the signal (mixing desk output) to INPUT on the first active N208 unit. Use
the LINK output to transfer the INPUT signal to the second active N208 unit. All of
the units in this chain must be switched on.
Use the SPEAKON LINK output (“To N208P”) to transfer the INPUT signal to each
passive N208P units.
For the mains connection use the cable with the blue Neutrik PowerCon NAC3FCA.
Use the LINK output to transfer the AC signal to the second active unit. Do not
connect NITID active units using PowerCon without earth.

NITID N208 Dec 2018
19 Amate Audio
Fig. 19. Connection of 4 units of N208 (signal and mains)
2.3.3 Connection of more than 4 units
Connect the signal (mixing desk output) to XLR INPUT on the first active N208 unit.
Use the LINK XLR output on the first active N208 unit to transfer the INPUT signal to
the second active N208 unit and thus sequentially for further units. All of the units in
this chain must be switched on.
Use the SPEAKON LINK output (“To N208P”) to transfer the INPUT signal to each
passive N208P units.
Fig. 20. Connection of 8 units of N208 (signal and mains)

NITID N208 Dec 2018
20 Amate Audio
For the mains connection use the cable with the blue Neutrik PowerCon NAC3FCA.
Use the LINK output to transfer the AC signal to the second active unit and thus
sequencially for further units. Do not connect NITID active units using PowerCon
without earth.
Do not connect more than three N208 units using the AC Stacking output
connector (this is the maximum number of units that can be linked).
Nevertheless, we recommend to link two units whenever is possible.
2.3.4 Parallel connection with subwoofers
You can connect N18W and N218W subwoofers in parallel with N208 cabinets.
Please, follow the same parameters as explained in Fig. 20.
3 MOUNTING AND PLACEMENT N208
Flying a NITID Line Array system is easy, fast and secure. To perform any
operations related to flying the system, read the present document, and act on the
warnings and advice given.
Only experienced installers with adequate knowledge of the system and local safety
regulations should fly speaker cabinets.
It is the user's responsibility to ensure that the systems to be flown and the flying
accessories (such as chains, eyebolts, lock pins...) comply with state and local
regulations. They should be regularly inspected and replaced if in doubt.
When flying enclosures from ceiling support structures, extreme care should be
taken to assure the load bearing capabilities of the structures. Do not fly systems
from unsafe structures.
All flying accessories that are not supplied by Amate Audio are the user's
responsibility. Use at your own risk.
Remember that no risks should be taken with regards to public
safety.
3.1 Description
Each N208 cabinet includes two structures on each side of the enclosure, one on the
front-lateral side and the other on the back-lateral side. These structures are
manufactured from 4mm black painted stainless steel; they are affixed to an internal
plate with special crop resistant screws. There is a guide (front guide) assembled on
the front-lateral structure (which is used to vertically join the cabinets); a second
guide (back guide) assembled on the back-lateral structure is used to vertically join
the cabinets and to tilt them.