509137(0)
5/10/01
The bi-amplified or tri-amplified 3-way full range loudspeaker
system shall incorporate 2x 12-in LF transducers, a horn-
loaded 10-in MF cone with Radial Phase Plug™ and a 1.4-in
exit/2.5-in voice coil HF neodymium compression driver.
The LF drivers shall be mounted in slanted baffles and sepa-
rated vertically. The MF driver shall be loaded into a midrange
horn constructed of 1/8-in birch plywood backed with high
density polyurethane foam. The HF driver shall be loaded on
a constant directivity horn with a nominal coverage pattern
of 90° (h) x 45° (v). An internal passive filter network shall
provide fourth order acoustical crossover and system equal-
ization between the MF and HF subsystems.
System frequency response shall vary no more than ±3 dB
from 67 Hz to 15 kHz measured on axis. The mid/high sec-
tion shall produce a Sound Pressure Level (SPL) of 107 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 low frequency section shall produce a Sound
Pressure Level (SPL) of 102 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. The mid fre-
quency section shall produce a Sound Pressure Level (SPL) 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 141 dB
SPL on axis at 1 meter. The high frequency section shall pro-
duce a Sound Pressure Level (SPL) 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 136 dB SPL on axis at 1 meter.
The mid/high section shall handle 450 Watts of amplifier
power (contiuous) and shall have a nominal impedance of 8
Ohms. The low frequency section shall handle 800 Watts of
amplifier power (continuous) and shall have a nominal
impedance of 4 Ohms. The mid frequency section shall han-
dle 400 Watts of amplifier power (continuous) and shall have
a nominal impedance of 8 Ohms. The high frequency section
shall handle 125 Watts of amplifier power (continuous) and
shall have a nominal impedance of 8 Ohms.
The loudspeaker enclosure shall be rectangular in shape. It
shall be constructed of multi-ply, void-free, cross-grain-lami-
nated, exterior grade, Baltic birch plywood and shall employ
extensive internal bracing. It shall be finished in wear-resist-
ant, textured black paint. Input connectors shall be 2x 6-
con-
tact terminal barrier strips. Eighteen (18) 3/8"-16 threaded
mounting/suspension points (4 each top, bottom and sides,
2 on back) shall be provided. The front of the loudspeaker
shall be covered with a powder coated perforated steel grille.
The bi-amplified or tri-amplified 3-way full range loudspeak-
er shall be the EAW model ASR690e.
Manufacturing tolerances are +/- 0.13 and +/- 1°