EAW MQTD812 User Manual
Frequency Response (1 Watt @ 1m)
±3 dB 58 Hz to 500 Hz
-10 dB 48 Hz
Axial Sensitivity (dB SPL, 1 Watt @ 1m)
12-in 104
8-in 104
Impedance (Ohms)
12-in 2x 4
8-in 2x 6
Power Handling, AES Standard (Watts)
12-in 2000
8-in 800
Calculated Maximum Output (dB SPL)
12-in Peak 143.0
8-in Peak 139.0
12-in Long Term 137.0
8-in Long Term 133.0
90º Off -Axis Rejection
Vertical 10-12dB Attenuation 160-
500 Hz
A unique 2 way bass system employing Tuned Dipolar Array
Technology. Includes 4x 12" Woofers (vented) and 4x 8"
woofers (sealed) in a trapezoidal enclosure.
The MQTD812 uses patented Tuned Dipolar Array (TDA)
Technology to achieve unprecedented LF directivity in the
vertical plane without en orm ous horns or baffles. The compact, high output LF system works with MQ Series
mid/high mod ules to create true 3-way arrays in large f ormat installations. A powerful tool where LF directivity is
required. Six year warranty.
Applications include:
Stadiums Arenas Dance Clubs
Theaters Performing Arts Centers
Large Houses of Worship
SPECIFICATIONS MQTD812
DESCRIPTION
PERFORMANCE
One Main Street, Whitinsville, MA 01588 508 234 6158 Toll Free 800 992 5013 FAX 508 234 8251 info@eaw.com www.eaw.com
EAW products are continually improved. All specifications are therefore subject to change without notice. MQTD812/888175 Rev(1)/2 pp 7/25/00 Printed in USA
APPLICATION
PHYSICAL
LF Subsystem 4x 12-in, vented
4x 8-in, sealed
Configuration Dedicated LF tuned dipolar array
Powering Mode Bi-amplified
Cabinet Type (shape) Trapezoidal
Enclosure Materials Baltic birch plywood
Finish
Wear-resistant textured black paint
Connectors 2x 4-Terminal barrier strip
Suspension Hardware (16) 3/8”-16 threaded mounting
points (4 each top, bottom, and
sides)
Grille Powder coated perforated steel
Dimensions inches millimeters
Height 40.00 1016
Width (front) 33.36 847
Width (rear) 24.09 612
Depth 17.29 439
Trapezoid Angle 15°
Weights pounds kilograms
Net Weight 230 1 04.3
Shipping Weight 250 113.4
SPECIFICATIONS MQTD812
DIMENSIONAL DRAWING
A & E SPECIFICATIONS
One Main Street, Whitinsville, MA 01588 508 234 6158 Toll Free 800 992 5013 FAX 508 234 8251 info@eaw.com www.eaw.com
EAW products are continually improved. All specifications are therefore subject to change without notice. MQTD812/888175 Rev(1)/2 pp 7/25/00 Printed in USA
The dual bi-amplified dedicated low frequency loudspeaker
systems shall incorporate a four 12-in LF transducers and four
8-in LF transdu cers. The 12-in drivers shall be powered as two
pairs, as shall the 8-in drivers. The system shall require an
active external crossover at 250 Hz, 24dB Octave between th e
8-in and 12-in drivers.
The 12-in drivers shall be mounted in a vented enclosure
tuned for optimum low frequency response. The 8-in drivers
shall be mounted in a sealed subenclosure. The four driver
pairs shall be spaced to create a dipolar array such that the
total system shall provide 10 - 12 dB atten uation from 160 to
500 Hz at 90° off-axis (vertical).
System frequency response shall vary no more than ±3 dB
from 58 to 500 Hz measured on axis. The 12-in drivers shall
produce a Sound Pressure Level (SPL) of 104 dB SPL on axis
at 1 meter with a power input of 1 Watt, and shall be capable of producing a peak output of 143.0 dB SPL on axis at 1
meter. The 12-in drivers shall handle 2000 Watts of amplifier
power (AES Standard) and shall have nominal impedances of
2x 4 Ohms.
The 8-in drivers shall produce a Sound Pressure Level (SPL) of
104 dB SPL on axis at 1 meter with a power input of 1 Watt,
and shall be capable of prod ucing a peak output o f 139 dB SPL
on axis at 1 meter. The 8-in drivers shall handle 800 Watts of
amplifier power (AES Standard) and shall have nominal
impedances of 2x 6 Ohms.
The loudspeaker enclosure shall be trapezoidal in shape. It
shall be constructed of 1/2-in thi ckn ess voi d-fr ee cr oss-gr ainlaminated Baltic birch plywood and shall employ extensive
internal bracing. It shall be finished in wear-resistant textured black paint. Input connector shall be 2x 4-termin al barrier strips. A total of sixteen 3/8”-16 threaded mounting
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 dual bi-amplified dedicated low frequency loudspeaker
systems shall be the EAW model MQTD812.
Manufacturing tolerances are +/- 0.13 and +/- 1°
509007 (A)
exp 3/29/00 dpm
MQTD812
INDICATES MOUNTING POINT,
16X 3/8-16 THREADED HOLE (PI ANGLE).
3.25
L
C
17.29
27.80
(24.09)
DIMENSIONS APPLY TO
TOP & BOTTOM
TOP/BOTTOM
21.64
30°
7.37
BACK
INPUT
10.86
5.62
3.26
40.00
FRONT
C
L
33.36
GRILLE PARTIALLY SHOWN
1.95
SIDES
DIMENSIONS APPLY TO
BOTH SIDES
11.913.86
1.95
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