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 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°
