Amate Audio XCELLENCE X212AF User manual

User’s manual
X212AF
X218WF
April 2019

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Safety Instructions
1. All safety instructions must be read before using this device.
2. The exclamation mark in the triangle indicates internal components which if
replaced can affect safety.
3. The lightning symbol within the triangle indicates the presence of dangerous
uninsulated voltages.
4. This device must not be exposed to rain or humidity. It must not be used for
example near swimming pools, fountains or any other place where it might be
affected by liquids.
5. Only clean the device with a dry cloth.
6. Do not situate the equipment where its ventilation system might be interfered with.
7. Do not install the device near heat sources such as radiators, heaters or other
heat-emitting elements.
8. 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
9. Disconnect the device in the case of electric storms or during long periods of
disuse.
10. Never hang the equipment by its handle.
11. Only use manufacturer recommended accessories.

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1. INTRODUCTION
1.1. General product information
Amate Audio thanks you for the trust placed in our Xcellence loudspeaker systems.
The Xcellence series combines the convenience of a self-powered system and the
flexibility of the DSP (digital system processing) for cabinet control. More than 45
years’ experience in amplifier and acoustic cabinet design using the highest
technology and components come together to give you a product ideal for a
multitude of applications, especially those which require high levels of sound
pressure and a control of vertical coverage. Stadiums, theatres or big events will
become the perfect places for their use. We suggest you read the following
information with attention, assured that it will be of maximum use in helping you to
achieve the best results and optimum 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 wave fronts generated by individual sources into a
single flat wave front.
Fig.1. Wave field interference for different wave fronts.
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:
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

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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.
The wave fronts 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 wave fronts with a constant phase. By vertically assembling
these waveguides we fulfil the second criterion of line array construction.
Fig.2. Second criterion of "arrayability"
The deviation from a flat wave front must be less than λ/4 at
the highest operating frequency (this corresponds to less
than 5 mm curvature at 16 kHz).
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 wave front is
ideal for vertical configurations.
Fig.3. High frequency waveguide

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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
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".
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).
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 8º.
Fig.4. Tilt angle between cabinets (8º 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

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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 wave front is
cylindrical and waves only
expand on the horizontal plane
(100º). The height of the wave
front is, in this case, the total
height of the array.
In the far field region
(Fraunhofer), the wave front is
spherical and expands both on
the horizontal and vertical
planes. The horizontal
coverage is 100º 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.
Fig.6. dcCalculation
A 6-cabinet array has a near field extending to 16 metres at 2kHz. Beyond this
distance the wave front 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.

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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
X212AF
- Self-powered three-way acoustic
system
- XLR electronically balanced input
& XLR parallel link
- AC PowerCon input & link
- EtherCon RJ45 input & link
- 2000W class D amplifier for bass
range
- 1000W class D amplifier for mid-range
- 1000W class D amplifier for high range
- 24-bit AD/DA converters with 112 dB dynamic range, 48 kHz sampling rate
- DSP Controls (presets, parametric EQs, delay, mute, volume and limiter)
- Amplifier self-diagnostics: input level, temperature, limiter active
- Overvoltage protection (>250V-400V)
-Ethernet connectivity
- 2 x 12” neodymium woofers with 3” voice coil
- 4 x 6” neodymium woofers with 1.5” voice coil coupled to 2 x mid phase plugs
- 2 x 3” titanium diaphragm neodymium drivers coupled to 1 x HF waveguide
- 100 x 8º dispersion
X218WF
- Self-powered subwoofer
- XLR electronically balanced input & XLR parallel link
- AC PowerCon input & link
- EtherCon RJ45 input & link
- 5000W amplifier
- 24-bit AD/DA converters with 112 dB dynamic range, 48 kHz sampling rate
- DSP Controls (presets, parametric EQs, delay, mute, volume and limiter)
- Amplifier self-diagnostics: input level, temperature, limiter active
- Overvoltage protection (>250V-400V)
- Ethernet connectivity.
- 2 x 18” long-excursion neodymium woofers with 4” voice coil and demodulation
rings to reduce distortion and the transitory response
2. X212AF FEATURES
The X212AF cabinet is ideal for a multitude of applications. It includes 2000W
amplification for the low range woofers, 1000W for the mid-range woofers, 1000W
for the high range compression drivers and digital signal control by DSP. The

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manufacturer presets make it easy, flexible and user-friendly. The result is a clean,
high quality sound at full power in larger sites.
2.1. Technical description
The X212AF cabinet comes with DSP control, full range sound delivery thanks to its
direct radiation transducers and acoustic bass reflex cabinet. As a full range system,
its response is 42Hz-18 kHz (-10 dB). It has 4000W continuous amplification (2000W
+ 1000W + 1000W), thermal protection, output short circuit protection, independent
peak and RMS power limiters for each channel, and protection against overvoltage.
The DSP includes several presets which can be selected either accessing the
cabinet’s rear control screen or via the computer with Ethernet connection.
The X212AF cabinet is connected using the XLR balanced connector. Mains supply
is through PowerCon. It is built in birch plywood, which has a high resistance to
vibrations and humidity with black Polyurea paint coating. The front face is protected
by two 1.5 mm thick steel grilles with acoustically transparent grey cloth. It includes
two in-built lateral handles for an easy and comfortable transport.
Fig.8. X212AF external dimensions
3. X218WF FEATURES
The X218WF cabinet is ideal for bass reinforcement. It includes 5000W amplification
for the woofer and digital signal control by DSP. The manufacturer presets make it
easy, flexible and user-friendly.

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3.1. Technical description
The X218WF cabinet comes with DSP control, direct radiation transducers and
acoustic bass reflex cabinet. As a subwoofer system, its usable bandwidth is 25Hz-
120Hz (-10 dB). It has 5000W continuous amplification (2500W + 2500W), ), thermal
protection, output short circuit protection, independent peak and RMS power limiters
for each channel, and protection against overvoltage. The DSP includes several
presets which can be selected either accessing the cabinet’s rear control screen or
via the computer with Ethernet connection.
The X218WF cabinet is connected using the XLR balanced connector. Mains supply
is through PowerCon. It is built in birch plywood, which has a high resistance to
vibrations and humidity with black Polyurea paint coating. The front face is protected
by two 2 mm thick steel grilles with acoustically transparent grey cloth. It includes
two in-built lateral handles and one back handle for an easy and comfortable
transport.
Fig.9. X218WF external dimensions
4. PRESETS
The X212AF and X218WF include several manufacturer presets for different types of
application. The DSP system can also store up to 25 other presets, depending on
user requirements

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4.1. X212AF as a standalone line source
Deployed as a line source system, the system operates over the
nominal bandwidth of the X212AF enclosure (42 Hz – 18 kHz, -10dB).
Model: X212AF
Preset:[HPF60 FLAT] [HPF60 FLAT]
The minimum number of cabinets to be used as a
standalone line source system is 6 cabinets. We do not
recommended to use less than 6 cabinets per side. The
optimum number of cabinets per side would be from 8-9
cabinets to up.
4.2. X212AF as a standalone line source including NearField and Longthrow
cabinets
Deployed as a line source system
of more than 9 cabinets, you [HPF60 LTHROW]
may need to use some cabinets as
Longthrow cabinets (the upper ones)
and some cabinets as Nearfield
cabinets (the lower ones). The system
operates over the nominal
bandwidth of the X212AF enclosure (42 Hz – 18 kHz, -10dB).
Model: X212AF
Preset: [HPF60 LONGTHROW]
Model: X212AF [HPF60 FLAT]
Preset: [HPF60 FLAT]
Model: X212AF
Preset: [HPF60 NEARFIELD]
[HPF60 NFIELD]