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3-WAY FULL-RANGE COAXIAL, 60° x 45°
See NOTES TABULAR DATA for details
CONFIGURATION
Subsystem
Transducer
LF 2x 12 in cone
MF 1x 8 in cone
Loading
PhaseAligned™
Horn-loaded w/Radial
Phase Plug™
HF 1x 1.4 in exit, 2.5 in voice Horn-loaded w/Radial
coil compression driver
Phase Plug™
Operating Mode
Amplifier Channels
External Signal Processing
DSP
Single-amp LF/ MF/HF
Bi-amp LF, MF/HF
DSP w/2-way filters
PERFORMANCE 1
Operating Range
68 Hz to 20 kHz
Nominal Beamwidth (rotatable)
Horz 60°
Vert 45°
Axial Sensitivity (whole space SPL)
LF/MF/HF 102 dB
LF 103 dB
68 Hz to 20 kHz
68 Hz to 335 Hz
275 Hz to 20 kHz
MF/HF 104 dB
Input Impedance (ohms)
Nominal
Minimum
LF/MF/HF
LF
8
8
8
6.3 @ 93 Hz
7.9 @ 165 Hz
6.8 @ 3120 Hz
DESCRIPTION
The AX3 Series is a versatile set of arrayable, full-range modules that
can provide the "horsepower" for the high outputs required in larger
venues. The AX3 Series include horn patterns from 45° x 45° to 90° x
60°.AllAX enclosures, including theAX2 Series and companionAX122
subwoofer, have an identically sized, dual trapezoidal shape. This
permits creating horizontally or vertically orientated arrays in a variety of
beamwidths, with the AX's superior horizontal and vertical pattern
symmetry maintaining the proper relationship between the polar
patterns.Aset of 3/8-16 threaded mounting points facilitate installation.
MF/HF
High Pass Filter
High Pass =>40 Hz, 24 dB/octave Butterworth
Accelerated Life Test 2
LF/MF/HF 80 V
LF 89 V
800 W @ 8 ohm
1000 W @ 8 ohm
300 W @ 8 ohm
MF/HF 49 V
Calculated Axial Output Limit (whole space SPL)
Average
Peak
137 dB
139 dB
135 dB
Single-amp and bi-amp operating modes are user-selectable. In
single-amp mode, the passive crossover is designed to work with a
digital signal processor (DSP). This reduces the crossover’s
complexity, minimizes power losses, and provides more
sophisticated digital processing to maximize performance.
LF/MF/HF 131 dB
LF 133 dB
MF/HF 129 dB
ORDERING DATA
Description
Part Number
0010474
The AX3 Series features a newly-designed, coaxial transducer with
high efficiency, MF cone and HF compression drivers. The drivers
share a common, neodymium magnet allowing closely spaced voice
coils. This minimizes the distance between the MF and HF acoustic
origins for highly coherent sound both on and off axis. The MF's
sealed, aluminum chassis acts as a heat sink for the entire assembly.
AX364 3-Way Full-Range Loudspeaker Black
AX364 3-Way Full-Range Loudspeaker White
0011589
AX364 3-Way Full-Range Loudspeaker Black WP 0011578
Optional Accessories
Eyebolt/Forged Shoulder (3/8-16 x 1.25 in)
104001
The MF/HF transducer loads into a large, common horn via a
modified version of the EAW's patented Radial Phase Plug™. A
unique HF waveguide is integrated within the center of the phase
plug. It is acoustically transparent to the MF energy while being
acoustically opaque to and acting as a waveguide for the HF energy.
The low frequencies are reproduced by a pair of spaced, 12-inch
cone drivers. This LF subsystem maintains the overall coaxial
design as its acoustic origin is along the acoustic axis of the MF/HF
subsystem. In addition, the LF driver spacing provides better pattern
control than systems of similar size that use a single LF driver.
The companion AX122 subwoofer is designed to extend the low
frequency response of the AX3 full-range loudspeakers. With an
identically-sized enclosures,AX122s array perfectly withAX3s.
Six year warranty.
1 To achieve specified performance, the listed external signal processing with EAW-provided settings is required.
2 For recommendations to select power amplifier size refer to : “HOW MUCHAMPLIFIER POWER DO I NEED?” on the EAW web site.
Eastern Acoustic Works One Main Street Whitinsville, MA 01588 tel 800 992 5013 / 508 234 6158 fax 508 234 8251 www.eaw.com
EAW products are continually improved. All specifications are therefore subject to change without notice.
Part Number: RD0188 (C) AX364 November 2005
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PERFORMANCE DATA
See NOTES GRAPHIC DATA for details
Frequency Response: Processed Bi-amplified
LF = green, MF/HF = black, Complete = blue
Frequency Response: Processed Single-amplified
Complete = blue
10
0
10
0
-10
-20
-30
-40
-10
-20
-30
-40
-50
-50
10
10
100
1000
20000
100
1000
20000
Frequency (Hz)
Frequency (Hz)
Frequency Response: Digital Signal Processor
LF = green, MF/HF = black, Single-amp = blue
Frequency Response: Unprocessed
LF = green, MF/HF = black, Single-amp = blue
120
110
100
90
20
10
0
-10
-20
-30
-40
80
70
60
10
100
1000
20000
10
100
1000
20000
Frequency (Hz)
Frequency (Hz)
Impedance Magnitude
LF = green, MF/HF = black, Single-amp = blue
Beamwidth (-6 dB SPL Points)
Horizontal = orange Vertical = black
400
100
100
10
1
10
1
10
100
1000
20000
100
1000
20000
Frequency (Hz)
Frequency (Hz)
Eastern Acoustic Works One Main Street Whitinsville, MA 01588 tel 800 992 5013 / 508 234 6158 fax 508 234 8251 www.eaw.com
EAW products are continually improved. All specifications are therefore subject to change without notice.
Part Number: RD0188 (C) AX364 November 2005
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HORIZONTAL POLAR DATA (Gridlines: 6 dB axial / 15 degree radial)
See NOTES GRAPHIC DATA for details
100 Hz
125 Hz
160 Hz
200 Hz
1600 Hz
2000 Hz
2500 Hz
3150 Hz
90
90
135
45
135
45
180
0
0
0
180
0
-135
-45
-135
-45
-90
90
-90
90
250 Hz
315 Hz
400 Hz
500 Hz
4000 Hz
5000 Hz
6300 Hz
8000 Hz
135
45
135
45
180
180
0
-135
-45
-135
-45
-90
90
-90
90
630 Hz
800 Hz
10000 Hz
12000 Hz
16000 Hz
1000 Hz
1250 Hz
135
45
135
45
180
180
0
-135
-45
-135
-45
-90
-90
Eastern Acoustic Works One Main Street Whitinsville, MA 01588 tel 800 992 5013 / 508 234 6158 fax 508 234 8251 www.eaw.com
EAW products are continually improved. All specifications are therefore subject to change without notice.
Part Number: RD0188 (C) AX364 November 2005
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VERTICAL POLAR DATA (Gridlines: 6 dB axial / 15 degree radial)
See NOTES GRAPHIC DATA for details
1600 Hz
100 Hz
125 Hz
160 Hz
200 Hz
2000 Hz
2500 Hz
3150 Hz
90
90
135
45
135
45
180
0
0
0
180
0
-135
-45
-135
-45
-90
90
-90
90
250 Hz
315 Hz
400 Hz
500 Hz
4000 Hz
5000 Hz
6300 Hz
8000 Hz
135
45
135
45
180
180
0
-135
-45
-135
-45
-90
90
-90
90
630 Hz
800 Hz
10000 Hz
12000 Hz
16000 Hz
1000 Hz
1250 Hz
135
45
135
45
180
180
0
-135
-45
-135
-45
-90
-90
Eastern Acoustic Works One Main Street Whitinsville, MA 01588 tel 800 992 5013 / 508 234 6158 fax 508 234 8251 www.eaw.com
EAW products are continually improved. All specifications are therefore subject to change without notice.
Part Number: RD0188 (C) AX364 November 2005
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INPUT PANEL
SIGNAL DIAGRAM
3-Way, Single-Amp (LF/MF/HF)
S/N
WHITINSVILLE, MA USA
HF
BI-AMP INPUT
MF/HF
--LF
+
--
+
DSP
N/C
XVR
AMP
MF
LF
EQ
HPF
CONNECT
JUMPERS
FOR PASSIVE
OPERATION
PASSIVE
INPUT
3-Way, Bi-Amp (LF, MF/HF)
AMP
DSP
HF
MF
--
+
--
+
--
+
XVR
MANUFACTURED UNDER ONE OR MORE OF THE FOLLOWING U.S. PATENTS:
5,996,728; 6,009,182; 6,016,353; 6,094,495; 6,118,883
EQ
DELAY
HPF/LPF
AMP
LF
HORN PATTERN LABEL (factory installed horn orientation)
45
LEGEND
60
DSP:
HPF:
LPF:
User-supplied Digital Signal Processor.
High Pass Filter for crossover or Recommended High Pass Filter.
Low Pass Filter for crossover.
LF/MF/HF: Low Frequency / Mid Frequency / High Frequency.
AMP:
XVR:
User-supplied Power Amplifier.
Passive LPFs, HPFs, and EQ integral to the loudspeaker.
AX364
NOTES
TABULAR DATA
1. Measurement/Data Processing Systems: Primary - FChart: proprietary EAW software; Secondary - Brüel & Kjær 2012.
2. Microphone Systems: Earthworks M30; Brüel & Kjær 4133
3. Measurements: Dual channel FFT; length: 32 768 samples; sample rate: 48 kHz; logarithmic sine wave sweep.
4. Measurement System Qualification (includes all uncertainties): SPL: accuracy +/-0.2 dB @ 1 kHz, precision +/-0.5 dB 20 Hz to 20 kHz, resolution 0.05 dB; Frequency: accuracy +/-1 %,
precision +/-0.1 Hz, resolution the larger of 1.5 Hz or 1/48 octave; Time: accuracy +/-10.4 µs, precision +/-0.5 µs, resolution 10.4 µs;Angular: accuracy +/-1°, precision +/-0.5°, resolution 0.5°.
5. Environment: Measurements time-widowed and processed to eliminate room effects, approximating an anechoic environment. Data processed as anechoic or fractional space, as noted.
6. Measurement Distance: 7.46 m.Acoustic responses represent complex summation of the subsystems at 20 m. SPLis referenced to other distances using the Inverse Square Law.
7. Volts: Measured rms value of the test signal.
8. Watts: Per audio industry practice, “loudspeaker watts” are calculated as voltage squared divided by rated nominal impedance. Thus, these are not True Watt units of energy as defined by
International Standard.
9. SPL: (Sound Pressure Level) Equivalent to the average level of a signal referenced to 0 dB SPL= 20 microPascals.
10. Subsystem: This lists the transducer(s) and their acoustic loading for each passband. Sub = Subwoofer, LF = Low Frequency, MF = Mid Frequency, HF = High Frequency.
11. Operating Mode: User selectable configurations. Between system elements, a comma (,) = separate amplifier channels; a slash (/) = single amplifier channel. DSP= Digital Signal Processor.
IMPORTANT: To achieve the specified performance, the listed external signal processing must be used with EAW-provided settings.
12. Operating Range: Range where the processed Frequency Response stays within -10 dB SPLof the power averaged SPLwithin this range; measured on the geometric axis. Narrow band
dips are excepted.
13. Nominal Beamwidth: Design angle for the -6 dB SPLpoints, referenced to 0 dB SPLas the highest level.
14. Axial Sensitivity: Power averaged SPLover the Operating Range with an input voltage that would produce 1 W at the nominal impedance; measured with no external processing on the
geometric axis, referenced to 1 m.
15. Nominal Impedance: Selected 4, 8, or 16 ohm resistance such that the minimum impedance point is no more than 20% below this resistance over the Operating Range.
16. Accelerated Life Test: Maximum test input voltage applied with an EIA-426B defined spectrum; measured with recommended signal processing and Recommended Protection Filter.
17. CalculatedAxial Output Limit: Highest average and peak SPLs possible during theAccelerated Life Test. The Peak SPLrepresents the 2:1 (6 dB) crest factor of the Life Test signal.
18. High Pass Filter: This helps protect the loudspeaker from excessive input signal levels at frequencies below the Operating Range.
GRAPHIC DATA
1. Resolution: To remove insignificant fine details, 1/12 octave cepstral smoothing was applied to acoustic frequency responses and 1/3 octave cepstral smoothing was applied to the
beamwidth and impedance data. Other graphs are plotted using raw data.
2. Frequency Responses: Variation in acoustic output level with frequency for a constant input signal. Processed: normalized to 0 dB SPL. Unprocessed inputs: 2 V (4 ohm nominal impedance),
2.83 V (8 ohm nominal impedance), or 4 V (16 ohm nominal impedance) referenced to a distance of 1 m.
3. Processor Response: The variation in output level with frequency for a constant input signal of 0.775 V = 0 dB reference.
4. Beamwidth:Average angle for each 1/3 octave frequency band where, starting from the rear of the loudspeaker, the output first reaches -6 dB SPLreferenced to 0 dB SPLas the highest
level. This method means the output may drop below -6 dB SPLwithin the beamwidth angle.
5. Impedance: Variation in impedance magnitude, in ohms, with frequency without regard to voltage/current phase. This means the impedance values may not
be used to calculate True Watts (see 9 above).
6. Polar Data: Horizontal and vertical polar responses for each 1/3 octave frequency band 100 Hz to 16 kHz or Operating Range.
Eastern Acoustic Works One Main Street Whitinsville, MA 01588 tel 800 992 5013 / 508 234 6158 fax 508 234 8251 www.eaw.com
EAW products are continually improved. All specifications are therefore subject to change without notice.
Part Number: RD0188 (C) AX364 November 2005
Download from Www.Somanuals.com. All Manuals Search And Download.
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AX SERIES TECHNOLOGY
CONVENTIONAL LOUDSPEAKERS
Good arrayability depends on the beamwidth patterns as well as the off-axis response to be symmetrical for both the
horizontal and vertical planes. A typical, high power, loudspeaker baffle is shown in Fig 1. For this and similar
arrangements, the height or width of each horn is typically smaller than ideal, reducing pattern control at the low end of
their passbands in one plane. Because the driver arrangement is asymmetrical, the projection pattern will be
asymmetrical left-to-right and up-to-down. In addition, the physical spacing between drivers means the time arrival from
each driver changes with listener location. While signal delays can correct for time arrival differences, the optimum delays
can only be set for one direction. Listeners off-axis of this path will still experience different arrival times from the various
drivers. When multiple loudspeaker are arrayed, these problems are compounded by the drivers in the additional
loudspeakers. Better layouts, such as found in EAW’s KF730, KF600, KF750, KF760, and KF850 Series have improved
on some of these issues, but not all of them at one time.
Fig 1 - Conventional High Output Loudspeaker
To eliminate arrival time differences, provide smooth off-axis response, and optimize pattern control for arraying, drivers
must be positioned symmetrically with as little physical offset as possible in all three planes . Additionally, horns need to
be symmetrically sized and as large as possible to achieve the desired pattern control at their lowest frequencies.
COAXIAL DRIVERS
A solution for the above problems is the co-axial driver, where two passbands, typically an LF (low frequency) or MF (mid
frequency)conedriverandHF(highfrequency)compressiondriverarecombinedwithinasingledriverassembly.Apassage
is created in the center, i.e. the pole piece, of the cone driver through which the HF driver's energy passes . While this can
almost eliminate any time arrival differences from the drivers, there are significant limitations to typical co-axial designs.
Fig 2 - Typical Coax HF Expansion
Horn-loading is normally required for high output loudspeakers. To this end, the cone driver’s diaphragm is used as the
HF horn. However, this allows the HF to be modulated by high cone excursions. In addition, a horn’s rate of expansion
(curvature angle) should always increase towards the horn mouth. Simply loading a coaxial driver onto a horn breaks this
rule by creating a decrease in expansion rate at the driver-to-horn throat junction as shown in Fig 2. This causes
significant reflections off the horn walls, with resulting multiple arrivals at the listener, and prominent, undesirable side
lobes. Also, the path length from the cone center to the horn throat is longer than that from the circumference. In the
crossover region, this difference is typically an appreciable fraction of a wavelength. All these things result in uneven
frequency response, smeared transients, and poor pattern control.
Fig 3 - AX Coax HF Expansion
(CSA) CONCENTRIC SUMMATIONARRAY TECHNOLOGY
To solve these problems, EAW Engineers developed a new, sealed, coaxial driver. Its MF cone and HF compression
drivers share a single magnet structure, bringing the MF and HF sources as close together as physically possible. This
produces anAcoustic Singularity, essentially a point source, over the MF/HF operating range of 275 Hz to 20 kHz.
The real challenge was coupling this MF/HF device to a single horn without the acoustical difficulties of typical coaxial
drivers. This required creating both an always-increasing horn expansion rate over the HF range (Fig 3) and a phase plug
to properly load the MF cone driver, both to improve its efficiency and eliminate cone-to-horn path length differences. The
solution involved a modified version of EAW's patented Radial Phase Plug design, developed especially for cone drivers.
The phase plug was modified both to accommodate the AX's smaller MF driver diaphragm and to allow a conical HF
waveguide to nest within its center, optimized for proper HF wavefront expansion into the horn (Fig 4). While a physically
elegant solution, the waveguide's location within the MF phase plug meant it had to be acoustically transparent to MF
energy and opaque to HF energy.
Fig 4 - AX Coaxial Driver
Aseries of holes was added to the waveguide that met both acoustical criteria. The location and sizing of
these holes was based on a numerical sequence called The Fibonacci Numbers, first identified by
mathematician Leonardo Fibonacci. The holes were laid out along the walls of the waveguide by
crisscrossing spirals based on the sequence. The holes allow the waveguide to act as two mechanical
filters: a low pass for the MF and a high pass for the HF. This behavior was used to refine the hole shapes,
sizes, and quantities, the goal being raw MF and HF responses that could be easily smoothed by simple
passive filters and digital signal processing (DSP). The open area of the waveguide was evenly
distributed along the walls to achieve symmetrical off-axis MF response. At the same time, the hole
shapes and sizes were randomized to randomize the minor HF nulls caused by the holes. This resulted
in any cross section through the waveguide being physically 20% open and 80% solid (Fig 5).
0.386
0.424
0.415
AX SERIESAPPLICATION
To give array designers the most flexible, predictable and accurate array modules ever, this patent-
pending, CSA device was coupled to a selection of high-Q and medium-Q horns. Closely coupled, dual
12-inch woofers located on opposite edges of the horn extends the Acoustical Singularity concept into
the low frequencies. Both the MF/HF horns and dual-trapezoidal enclosures are symmetrical. This
means that both the horns and enclosures are fully rotatable to create the desired array pattern.
0.822
EAW patents for the fundamental ideas behind theAX Series:
1996 US Patent 6,118,883 LF spacing to match beamwidth through crossover within a horn:
The goal: Consistent power response across LF to MF sub-system transitions.
The solution:Aprecise formula to calculate the LF driver spacing required by a given MF horn mouth size.
1996 US Patent 6,094,495 Radial Phase Plug:
The goal: a midrange driver that could couple to a horn without multiple path lengths, multiple arrivals, or
1.007
0.315
frequency response anomalies.
The solution:A cone driver with a small-radius dust cap coupled to a Radial Phase Plug that equalizes
path lengths from the entire driver surface to the horn throat.
Green circle: circum = 8.017, open = [(2 x 0.386) + (2 x 0.415)] / 8.017 = 20%
Red circle: circum = 11.728, open = [(2 x 0.315) + ( 2 x 0.822)] /11.728 = 20 %
Blue circle: circum = 14.313, open = [(2 x 0.424) + ( 2 x 1.007)] / 14.313 = 20 %
2004 Patent Pending CSATechnology:
The goal: a coaxial MF/HF driver that could function as anAcoustical Singularity when coupled to a horn.
The solution: A new sealed MF/HF driver, whose cone and compression elements share the same
magnet structure, and a new phase plug with an HF waveguide that allows MF energy to pass through
while properly guiding the expansion of the HF wavefront.
Fig 6 - AX HF Waveguide Open Area at 3 Cross-sections
Eastern Acoustic Works One Main Street Whitinsville, MA 01588 tel 800 992 5013 / 508 234 6158 fax 508 234 8251 www.eaw.com
EAW products are continually improved. All specifications are therefore subject to change without notice.
Part Number: RD0188 (C) AX364 November 2005
Download from Www.Somanuals.com. All Manuals Search And Download.
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