509148 (0)
6/28/01
The tri-amplified, three-way full range loudspeaker system
shall incorporate 2x 12-in LF transducers, 2x 8-in slot-loaded
cone transducers and a 2-in exit/3-in voice coil compression
driver, also horn-loaded.
The LF transducers shall each be loaded into a proprietary
bent-horn, with the horn mouths horizontally separated to
provide controlled off-axis cancellations to match the MF
beamwidth through the crossover region. The MF transducers
shall both be coupled into a single large format horn. The HF
transducer shall be coupled to an HF horn coaxially mounted
with, and extended by, the MF horn. The system shall have a
nominal dispersion pattern of 100° (h) when used as part of
a KF760 or KF761 line array.
System frequency response shall vary no more than ±3 dB
from 80Hz to 16kHz measured on axis. The single loudspeak-
er’s subsystems (LF/MF/HF) shall produce Sound Pressure
Level (SPL) of 96/107/112 dB SPL on axis at 1 meter with a
power input of 1 Watt, and shall be capable of producing a
peak output of 135/140/140 dB SPL on axis at 1 meter. The
subsystems (LF/MF/HF) shall handle 2000/500/150 Watts of
amplifier power (continuous) and shall have nominal imped-
ances of 2x 8/8/8 Ohms.
The loudspeaker enclosure shall be trapezoidal in shape. It
shall be constructed of void-free cross-grain-laminated Baltic
birch plywood and shall employ extensive internal bracing. It
shall be finished in wear-resistant textured black paint. Input
connector shall be a Neutrik NL8 with an additional NL8 pro-
vided for connect through. Proprietary rigging is provided for
arraying. The front of the loudspeaker shall be covered with a
powder coated perforated steel grille.
The tri-amplified, three-way full range loudspeaker system
shall be the EAW model KF761.
Manufacturing tolerances are +/- 0.13 and +/- 1°
12°
