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SR-S4L

Line Arrays

SR-S4L

The SR-S4L is a two-way line array speaker ideal for long distance sound transmission and configures a line array by arranging speaker elements vertically close to each other. It can be converted into the bi-amplifier drive system by changing the internal connection. It can be used for high-impedance applications with the installation of the optional MT-S0601 Matching transformer.

  • 2-way line array speaker with 8 x 10 cm (4“) woofers and 24 high-frequency drivers, installed vertically
  • Sync-Drive technology creates ideal linear sound source
  • Clear sound with reduced attenuation over distance
  • Speakers are reflection-free and feedback resistant
  • Splashproof versions (SR-S4LWP/SR-S4SWP)
  • Bi-amp or single amp drive possible
  • Wide variety of mounting brackets available
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Enclosure
Bass-reflex type
Power Handling
Continuous program: 600 W (single-amp mode)
Low 240 W, High 240 W (bi-amp mode)
Rated Impedance
8 Ω (single-amp mode)
Low 8 Ω, High 8 Ω (bi-amp mode)
Sensitivity
94 dB (1 W, 1 m)
Frequency Response
70 Hz - 20 kHz (when recommended parameters are applied by the optional DP-SP3)
Crossover Frequency
3.5 kHz
Directivity Angle
Horizontal: 90°, Vertical: 0° (within the range of speaker height)
Speaker Component
Low frequency: 10 cm cone-type x 8
High frequency: 2.5 cm balanced dome-type x 24
Input Terminal
M5 screw terminal, distance between barriers: 12.2 mm
and Neutrik NL4MP x 2
Finish
Enclosure: MDF, white, paint
Front grille: Punched steel plate, white, acrylic paint
Dimensions
160 (W) x 895 (H) x 255 (D) mm
Weight
16 kg
Included Accessories
Bi-amplifier drive rating label …1, Bi-amplifier drive input indication label …1
Optional Accessories
Matching transformer: MT-S0601, Extension plate: SR-EP4, Flying bracket: SR-FB4, Wall mounting bracket: SR-WB4, Wall tilt bracket: SR-TB4, Stand adapter: SR-SA4, Protection pad: SR-PP4, Floor stand: SR-FS4, Digital speaker processor: DP-SP3

Please download Datasheet to access full specifications.

Optional Accessory

The [long throw] speaker shall be a slim profile two-way, direct-radiating line array design, TOA Electronics model SR-S4L.   The low-frequency section shall consist of eight direct-radiating 10 cm cone-type drivers arranged in a vertical line and housed in a tuned and ported enclosure.  The high frequency section shall consist of 24 direct-radiating 25 mm balanced-dome tweeters arranged in a vertical line.  The tweeters shall be mounted centrally in front of the low frequency drivers, sharing the same horizontal axis. 

The integral frequency dividing network shall include both low pass and high pass filter sections and shall be optimized for smooth on-and off-axis frequency response.  The crossover frequency shall be 3,500 Hz.  Biamp operation shall be possible by changing the internal connections of the input connector panel.  The speaker input connectors shall include two screw terminal connections and two Neutrik NL4 type sockets, wired in parallel for pass-through to additional speakers.  In biamp mode, the NL4 sockets shall allow for discreet connection of both the LF and HF sections via a single NL4 plug using 4-conductor cable.  In biamp mode, pass-through of the biamp signal shall be possible by connection to the parallel-wired socket.

The speaker’s horizontal and vertical coverage shall be consistent with that of a straight line array design.  The horizontal coverage shall be 90 degrees nominal above 2,000Hz.  The vertical coverage shall extend to an area defined by a section of a cylinder whose height is equal to that of the speaker.  Extending the height of the cylinder-section which defines the coverage area shall be possible by stacking multiple units of the same model.  Adding a clothoid curved section to the coverage area, to extend coverage 10 degrees beyond the primary plane of coverage, shall be possible by stacking one or two straight line array systems, model SR-S4L, above a single clothoid curved line array system, model SR-S4S.  The consistency of coverage shall not be degraded when multiple units are stacked.

The speaker shall meet the following performance criteria.  Power handling (full range): 200 watts continuous pink noise (24 continuous hours, 50 Hz to 20 kHz), 360 watts continuous program. Power handling (biamp mode) Low Frequency input: 80 watts continuous pink noise (24 continuous hours, 50 Hz to 4 kHz), 150 watts continuous program; High Frequency input: 80 watts continuous pink noise (24 continuous hours, 4 kHz to 20 kHz), 150 watts continuous program.  Frequency response (10 dB below rated pressure sensitivity, with recommended equalization/without recommended equalization):  70 Hz to 20 kHz / 80 Hz to 20 kHz.  Pressure sensitivity (1 watt at 1 m, 230 to 2,500 Hz): 94 dB.  Impedance: 8 ohms nominal. When the optional line matching transformer model MT-S0601 is installed, the available power taps for 70.7 volt line applications shall be 7.5, 15, 30, and 60 watts (670, 330, 170, and 83 ohms respectively).

The speaker enclosure shall be made of medium density fiberboard and finished with white paint.  The speaker grille shall be made from a single punched steel plate and finished with white acrylic paint.  The dimensions (W x H x D) shall be 6.3” x 35.24” x 10.04” (160 mm x 895 mm x 255 mm) and weight shall be 35.3 lbs. (16kg).  The speaker enclosure shall be equipped with threaded inserts for the attachment of optional accessory brackets.  Available accessory brackets for flying, and for wall, ceiling and stand mounting shall be made of steel.

The loudspeaker shall be TOA model SR-S4L.
The matching transformer shall be TOA model MT-S0601.
The extension plate shall be TOA model SR-EP4.
The flying bracket shall be TOA model SR-FB4.
The wall tilt bracket shall be TOA model SR-TB4.
The wall mounting bracket shall be TOA model SR-WB4.
The floor stand shall be TOA model SR-FS4.
The stand adapter shall be TOA model SR-SA4.
The protection pad shall be TOA model SR-PP4.

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