Toa LE-M124, LE-M94, LE-M64, LE-M42 Instruction Manual

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

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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