Model
Horizontal Coverage
Angle
Vertical Coverage
Angle
Recommended Crossover
Frequency
Throat Diameter
Applicable Driver
Horn Bell
Construction
Horn Throat
Dimensions
(HxWxD)
Weight
Accessories
LE-940
90° (+22°, –6°)
(630 ~ 20kHz)
40° (+15°, –0°)
(630 ~ 20kHz)
LE-640
60° ( + 15°, –4°)
(630 ~ 16kHz)
40° (+16°, –2°)
(630 ~ 20kHz)
LE-420
40° ( + 13°, –1°)
(630 ~ 16kHz)
20° (+8°, –3°)
(1k ~ 16kHz)
500Hz or more
49mm (1.93")
HFD-651-8 (16), using throat adapter YS-651
Fibergrass reinforced plastic (FRP)
Cast-Aluminum
725 x780x 730mm
28.54"x30.71"x28.74"
13kg (28.7 Ibs)
725 x 780 x 730mm
28.54"x30.71"x28.74"
12kg (26.5 Ibs)
725x780x1, 378mm
28.54"x30.71"x54.25"
17kg (37.5 Ibs)
Hexagonal bolts M8x40···6, Hexagonal nuts M8···6
Flat washers 8 dia.···12, Spring washers 8 dia.···6
PROFESSIONAL SOUND SYSTEM
Instruction Manual
*Specifications are subject to change without notice.
Toa Electric Co, Ltd.
KOBE, JAPAN
Constant Directivity Horn
GENERAL DESCRIPTION
Employing Toa's unique technology, the LE series constant
directivity horns can meet even professional's stringent
standards that always require precise directivity control,
high efficiency and high quality sounds. Their ideal ap-
plications include theaters, concert halls, auditoriums, chur-
ches, and movie houses.
Different formulas are used to optimize the horizontal and
vertical side wall contours. Also, both side walls are so
arranged that a mouth is an equiphase surface, permitting
a sound wave to leave the horn open end at the same in-
stant.
These combine together to make the geometry ideal for
maintaining uniform directivity over the rated frequency
range and high efficiency especially in the low frequency
range.
Each horn is intended for use in systems with crossover at
500Hz or higher, and ensures uniform frequency response
over the full frequency range from 630Hz to 16kHz at any
point within the rated coverage angle. The horns have a
controlled coverage angle of 90 degrees horizontally by 40
degrees vertically (LE-940), 60°x40° (LE-640), or 40°x20°
(LE-420).
SPECIFICATIONS
Model LE-940
LE-640
LE-420
Each horn comes with a cast-aluminum throat with dia-
meter of 2in (49mm) for mating with Toa HFD-651-8 or
HFD-651-16 high-frequency compression driver through
the YS-651 throat adaptor (optional). The horn bell is con-
structed of fiberglass reinforced plastic. The horn bell and
throat, both having sufficient thickness, suppress reso-
nance.
FEATURES
1. Toa's unique horn design.
2. Excellently controlled horizontal and vertical dispersion
over the frequency range of 630Hz to 16kHz.
3. High efficiency and smooth frequency response.
4. 2in (49mm) throat diameter.
5. Resonance-free, rigid construction.
6. Mounting holes.
