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Instruction Manual
PROFESSIONAL SOUND SYSTEM
CONSTANT DIRECTIVITY HORN Model LE-M124, LE-M94
LE-M64, LE-M42
DESCRIPTION
Employing TOA's unique technology, the LE series constant directivity horns can m e et even professional's
stringent standards that always require precise directivity control, high efficiency and high quality sounds.
Their ideal applications include theaters, concert halls, auditoriums, churches, 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 may come near an equiphase surface as much as possible.
These combine together to make the geometry ideal for maintaining uniform directivity over the rated
frequency range.
Each horn is intended for use in system with crossover at 500 Hz or higher in the HFD-260 use and at 800
Hz or higher in the HFD-220 use, and ensures uniform frequency response over the full frequency range
from 800 Hz to 16 kHz at any point (2kHz~20kHz vertically) within the rated coverage angle. The horns have
a controlled coverage angle of 120 degrees horizontally by 40 degrees vertically (LE-M124), 90 ° x 40°
(LE-M94), 60° X 40° (LE-M64), 40° X 20° (LE-M42).
Each horn comes with 49 mm (2 in.) throat diameter for mating with TOA HFD-260-8(16) or HFD-220-8(16)
high-frequency compression driver. The horn is constructed of solid polyurethane, and having sufficient
thickness, suppress resonance.
FEATURES
1. TOA's unique horn design.
2. Excellently controlled horizontal and vertical dispersion over the frequency range of 800 Hz to 20 kHz.
3. High efficiency and smooth frequency response.
4. 49 mm (2 in.) throat diameter.
5. Resonance-free, rigid construction.
6. Attached an exclusive supporting bracket.
EQUALIZATION
When using the LE series constant directivity horns in combination with the HFD-260-8/16 and
HFD-220-8/16 drivers and with TOA Integrated sound processor "SAORI", set the horn equalizer built in the
digital channel divider module, long delay type (IS-110DL4, IS-110DL2) of the "SAORI" as shown the table
below.
HFD-260-8/16
HFD-220-8/16
LE-M124
TYPE 3
TYPE 8
LE-M94
TYPE 2
TYPE 8
LE-M64
TYPE 2
TYPE 8
TOA Corporation
KOBE, JAPAN
LE-M42
TYPE 5
TYPE 9
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LE-M124
Dimensions
Coverage Angle vs Frequency (– 6 dB)
Frequency
Horizontal
Vertical
Polar Response ( 1/3 Octave Pink Noise)
Directivity Factor vs Frequency (Q)
Frequency
Horizontal
Vertical
500Hz 1kHz 2kHz
4kHz 8kHz 16kHz
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LE-M94
Dimensions
Coverage Angle vs Frequency (- 6 dB)
Frequency
Horizontal
Vertical
Polar Response (1/ 3 Octave Pink Noise)
Directivity Factor vs Frequency (Q)
Frequency
Horizontal
Vertical
500Hz 1 kHz 2kHz
4kHz 8Hz 16kHz
– 3 –
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LE-M64
Dimensions
Coverage Angle vs Frequency (- 6 dB)
Frequency
Horizontal
Vertical
Polar Response (1/3 Octave Pink Noise)
Directivity Factor vs Frequency (Q)
Frequency
Horizontal
Vertical
500Hz 1kHz 2kHz
4kHz 8kHz 16kHz
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LE-M42
Dimensions
Coverage Angle vs Frequency (– 6 dB)
Frequency
Horizontal
Vertical
Polar Response (1/3 Octave Pink Noise)
Directivity Factor vs Frequency (Q)
Frequency
Horizontal
Vertical
500Hz 1kHz 2kHz
4kHz 8kHz 16kHz
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PRECAUTIONS
1. Attaching the driver unit
When attaching the driver unit to the horn, be sure to fix it after fastening the supplied supporting bracket
between them.
2. Horn installation
When fixing the horn to an enclosure or a suspension metal, make sure to fix both the mouth frange and
supporting bracket part (two positions) as shown i n the figure. (Procure the mounting brackets at site
according to installation places.)
Fixing at two positions. Fixing only at the Fixing only at the
SPECIFICATIONS
Horizontal Coverage Angel
( - 6
dB)
Vertical Coverage Angel
( - 6
dB)
Recommended Crossover
Frequency
Throat Diameter
Applicable Driver
Construction
Weight
Accessories
supporting bracket position. mouth frange position,
LE-M124
120° (4-23°, –13°)
(400 Hz~20 kHz)
40°(+17°,–10°)
(2 kHz~20 kHz)
500 Hz or more (HFD-260-8 or HFD-260-16 is used.)
800 Hz or more (HFD-220-8 or HFD-220-16 is used.)
HFD-260-8, HFD-260-16, HFD-220-8 or HFD-220-16
6 kg (13.2 lbs.)
LE-M94
90° (+13°, –6°)
(500Hz~16kHz)
40° (+16°, –7°)
(2 kHz~20 kHz)
49 mm (2
LE-M64
60°(+17°, –8°)
(800 Hz~20 kHz)
40°(+16°,–7°)
(1.6 kHz~20 kHz)
in.)
Solid polyurethane
5 kg (11.0 lbs.)
6 kg (13.2 lbs.)
9 kg (19.8 lbs.)
supporting bracket •••1 , Instruction manual •••1
LE-M42
40°(+12°, –2°)
(800 Hz~20 kHz)
20° (+15°, –7°)
(2 kHz~20 kHz)
Specifications are subject to change without notice.
133-01-304-10
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