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
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 transducers. 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 the
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 attenuation 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 capa-
ble 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 producing a peak output of 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 thickness void-free cross-grain-
laminated Baltic birch plywood and shall employ extensive
internal bracing. It shall be finished in wear-resistant tex-
tured black paint. Input connector shall be 2x 4-terminal bar-
rier 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 coat-
ed 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
11.91
3.86
1.95
