EAW MQH1346e User manual

EASTERN ACOUSTIC WORKS
One Main Street, Whitinsville, MA 01588 • (508) 234 - 6158 • FAX (508) 234 - 8251 • Email [email protected] • Web http://www.eaw.com
EAW products are continually improved. All specifications are therefore subject to change without notice. •MQH1346e-0002685/2p/April 2002 Printed In USA
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TECHNICAL SPECIFICATIONS MQH1346e
FEATURES
• Full-range, 3-way system
• 2x slot-loaded 15-in LF; horn-loaded 10-in MF; 2-in
Neodymium HF
• LF woofers spaced for directional control to below
200 Hz
• Asymmetrical (down-angled) 40°x 60°beamwidth
DESCRIPTION
A 3-way, quad-amplified full-range system in a vented trap-
ezoidal enclosure. Includes dual, slot-loaded 15-in woofers,
a horn-loaded 10-in MF cone with Radial Phase Plug™, and a
2-in exit/3-in diaphragm Neodymium compression driver. The
MF and HF horns provide an asymmetrical 40°x 60°
beamwidth. The enclosure is vertically configured for array-
ing in horizontal rows, and features a comprehensive system
of 3/8”-16 threaded suspension points.
APPLICATIONS
The MQH1346e represents a highly specialized approach de-
veloped to solve difficulties in larger venues. It provides
unique, down-angled coverage by using specially designed
asymmetrical MF and HF horns. Dual 15-in woofers are sepa-
rated at an optimal distance to provide significant off-axis
attenuation to below 200 Hz. To avoid problematic lobing in
the upper LF range, discrete signal processing reduces the
input to one LF driver while allowing the other to continue
to work up into the lower midrange. This more evenly matches
the MF horns beamwidth while assisting in maintaining pat-
tern control through the entire crossover region. The
MQH1346e requires four separate amplifier channels (quad-
amplification) and digital signal processing in order to achieve
the pattern control described.
Application Usage: Install
Houses of Worship Auditoriums
Theatres Arenas
Performing Arts Centers Stadiums
PERFORMANCE
Frequency Response
±3 dB 75 Hz to 15 kHz
-10 dB 42 Hz
Axial Sensitivity (dB SPL, 1 Watt @ 1m)
LowerLF 92
Upper LF 94
MF 110
HF 109
Impedance (Ohms)
Lower LF 8
Upper LF 8
MF 8
HF 8
Power Handling, AES Standard (Watts)
Lower LF 600
Upper LF 600
MF 400
HF 150
Calculated Maximum Output (dB SPL @ 1m)
Lower LF Peak 126.0
Upper LF Peak 128.0
MF Peak 142.0
HF Peak 137.0
Lower LF Long Term 120.0
Upper LF Long term 122.0
MF Long Term 136.0
HF Long Term 131.0
Nominal Coverage Angle, -6 dB Points (degrees)
Horizontal 40
Vertical 60
Recommended High-Pass Frequency
24 dB/Octave 45 Hz

Acoustic Performance Partnership Eastern Acoustic Works MQH1346e
One Main Street, Whitinsville MA, 01588 USA • Phone [phone] • Toll Free 800/992-5013 • Fax [phone] • Web http://www.eaw.com • email [e-mail]
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SPECIFICATIONS MQH1346e
ARCHITECTURAL SPECIFICATIONS
The 3-way full-range loudspeaker shall incorporate 2x 15-in
slot-loaded woofers, a 10-in MF cone with Radial Phase Plug™,
and a 2-in exit/3-in diaphragm HF compression driver. The
MF and HF devices shall be loaded on asymmetrical, down-
angled horns with a 40°x 60°beamwidth. The LF woofers
shall be optimally spaced to provide significant off-axis at-
tenuation to below 200 Hz.
System frequency response shall vary no more than 63 dB
from 75 Hz to 15 kHz measured on axis. The lower LF section
shall produce a sound pressure level of 92 dB SPL on axis at
1 meter with a power input of 1 watt, and shall be capable
of producing a peak output of 126 dB SPL on axis at 1 meter.
The upper LF section shall produce a sound pressure level of
94 dB SPL on axis at 1 meter with a power input of 1 watt,
and shall be capable of producing a peak output of 128 dB
SPL on axis at 1 meter. The MF section shall produce a sound
pressure level of 110 dB SPL on axis at 1 meter with a power
input of 1 watt, and shall be capable of producing a peak
output of 142 dB SPL on axis at 1 meter. The HF section
shall produce a sound pressure level of 109 dB SPL on axis at
1 meter with a power input of 1 watt, and shall be capable
of producing a peak output of 137 dB SPL on axis at 1 meter.
Both LF sections shall handle 600 watts of amplifier power
(AES Standard) and shall have a nominal impedance of 8
ohms. The MF section shall handle 400 watts of amplifier
power (AES Standard) and shall have a nominal impedance
of 8 ohms. The HF section shall handle 150 watts of ampli-
fier power (AES Standard) and shall have a nominal imped-
ance of 8 ohms.
The loudspeaker enclosure shall be trapezoidal in shape. It
shall be constructed of exterior grade Baltic birch plywood
and shall employ extensive internal bracing. It shall be fin-
ished in wear-resistant textured black paint. Input connec-
tors shall be a terminal strip. A total of 16x 3/8”-16 threaded
mounting/suspension points (4 each top, bottom, and sides)
shall be provided. The front of the loudspeaker shall be cov-
ered with a powder coated perforated steel grille.
The 3-way full-range loudspeaker shall be the EAW model
MQH1346e.
DIMENSIONAL DRAWING
PHYSICAL
LF Subsystem 2x 15-in cones, vented
MF Subsystem 10-in horn loaded cone, Radial
Phase Plug™
HF Subsystem 1x 2-in exit/3-in diaphragm voice
coil compression driver on a
constant directivity horn
Configuration 3-way, full-range
Powering Quad-amplified
Enclosure Material Exterior grade Baltic birch plywood
Finish Wear-resistant textured black paint
Connectors Terminal barrier strip
Suspension Hardware 16x 3/8”-16 threaded mounting
points (4 each on top, bottom and
sides)
Grille Powder coated perforated steel
Dimensions Inches Millimeters
Height (front) 54.0 1372
Width (Front) 27.0 711
Width (Rear) 8.4 213
Depth 27.0 686
Trapezoid Angle 20 degrees per side
Weights Pounds Kilograms
Net Weight 224 101.8
Shipping Weight 252 114.5
A
L
5.00
C
4.93
C
L
C
L
C
L
A
TOP
21.17 4.00
28.00
BACK
DIMENSIONS APPLY
TO BOTH SIDES
VIEW A-A
F ONT
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C
MQH1346e
BOTTOM
11.75
29.94
10.25
15.00
NOTES:
1. SYMBOL INDICATES MOUNTING POINT,
3/8-16 TH EADED HOLE (PI ANGLE).
2. SYMBOL INDICATES NON LOAD BEA ING
MOUNTING POINT, 3/8-16 TH EADED HOLE
(PI ANGLE).
3. SYMBOL INDICATES CENTE OF BALANCE.
4. WEIGHT APP OX. 224 LBS.
5. SHIPPING WEIGHT APP OX. 252 LBS.
27.00
DIMENSIONS APPLY
TO TOP AND BOTTOM
4.00
(2.53)
15.96
(8.35)
40°
ACCESS PANEL
ACCESS PANEL
25.16
(1.95)
ACCESS PANEL
50.10
G ILLE PA TIALLY SHOWN
54.00 48.94
26.75
INPUT
Manufacturing tolerances are +/-0.13 ans +/-1°