EAW MQH1346e User Manual

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 trapezoidal 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 arraying in horizontal rows, and features a comprehensive system

of 3/8”-16 threaded suspension points.

APPLICATIONS

The MQH1346e represents a highly specialized approach developed 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 separated 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 pattern control through the entire crossover region. The MQH1346e requires four separate amplifier channels (quadamplification) 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

EASTERN ACOUSTIC WORKS

One Main Street, Whitinsville, MA 01588 • (508) 234 - 6158 • FAX (508) 234 - 8251 • Email info@eaw.com • 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

SPECIFICATIONS MQH1346e

DIMENSIONAL DRAWING

10.25 C

15.00

21.17

TOP

DIMENSIONS APPLY TO TOP AND BOTTOM

28.00

GRILLE PARTIALLY SHOWN

FRONT

40°

C L

27.00

(8.35)

BOTTOM

Manufacturing tolerances are +/-0.13 ans +/-1°

ACCESS PANEL

11.75

4.00

54.00

ACCESS PANEL

25.16

(1.95)

50.10

VIEW A-A

DIMENSIONS APPLY

TO BOTH SIDES

NOTES:

1. SYMBOL INDICATES MOUNTING POINT, 3/8-16 THREADED HOLE (PI ANGLE).

2. SYMBOL INDICATES NON LOAD BEARING MOUNTING POINT, 3/8-16 THREADED HOLE

3. SYMBOL INDICATES CENTER OF BALANCE.

4. WEIGHT APPROX. 224 LBS.

5. SHIPPING WEIGHT APPROX. 252 LBS.

15.96

4.93

MQH1346e

(2.53)

48.94

26.75

INPUT

4.00

PHYSICAL

LF Subsystem 2x 15-in cones, vented

MF Subsystem 10-in horn loaded cone, Radial

HF Subsystem 1x 2-in exit/3-in diaphragm voice

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

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

Phase Plug™

coil compression driver on a constant directivity horn

points (4 each on top, bottom and sides)

BACK

(PI ANGLE).

29.94

5.00

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, downangled horns with a 40° x 60° beamwidth. The LF woofers shall be optimally spaced to provide significant off-axis attenuation 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 amplifier power (AES Standard) and shall have a nominal impedance 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 finished in wear-resistant textured black paint. Input connectors 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 covered with a powder coated perforated steel grille.

The 3-way full-range loudspeaker shall be the EAW model MQH1346e.

Acoustic Performance Partnership Eastern Acoustic Works MQH1346e

One Main Street, Whitinsville MA, 01588 USA • Phone 508/234-6158 • Toll Free 800/992-5013 • Fax 508/234-8251 • Web http://www.eaw.com • email info@eaw.com