Toa LE-420 Specifications

UNIFORM DIRECTIVITY HORNS
DESCRIPTION
The LE Series uniform directivity horns employ original TOA
technology to meet the most stringent professional standards
in precision directivity control, high efficiency and quality
audio output. LE Series uniform directivity horns are ideal for
applications such as theaters, concert halls, auditoriums and
churches.
The designs of horizontal and vertical side walls in the LE
Series employ different equations, and the side walls are
arranged so the mouth of the speaker is an equiphase sur-
face, permitting each sound wave to leave the horn's open
end at the same instant. These design features combine to
create an ideal geometry for maintaining uniform sound dis-
persion, as well as for ensuring high efficiency across the low
frequency band.
Each horn in the LE Series is intended for systems with a
crossover point at 500Hz or higher, and each is rated at a
uniform frequency range of 630Hz to 16kHz at any point
within the rated coverage angle. Controlled coverage patterns
for the horns (horizontal by vertical) are LE-940: 90° x 40°;
LE-640: 60° x 40°; LE-420: 40° x 20°.
Each horn comes with a cast aluminum 2-inch (49mm)
diameter throat, for mating with the TOA HFD-651-8 or
HFD-651-16 driver through the optional YS-651 throat adap-
tor. The horn mouth is constructed of fiberglass reinforced
plastic, and has sufficient thickness to suppress unnecessary
resonance. The mouth and throat are both provided with
mounting holes.
TOA SPEAKER SYSTEM
LE-940/LE-640/LE-420
FEATURES
1. Original TOA design ensures precise directivity control and
high quality sound.
2. Precisely controlled horizontal and vertical sound disper-
sion pattern across a frequency range of 630 to 16,000Hz.
3. High efficiency over the low frequency band.
4. Smooth frequency response.
5. 2-inch (49mm) diameter cast-aluminum throat.
6. Resonance-free, rigid construction.
7. Mouth/throat mounting holes.