SC-651
Paging Horn Speaker
DESCRIPTION
FEATURES
APPEARANCE AND
DIMENSIONAL DIAGRAM
TOA Corporation SC-651 1/2
• Newly developed polyimide diaphragm ensures durability during
50W output.
• Paging horn speaker for voice paging and tone signaling distribution
• Weather-Resistant to withstand demanding environmental conditions
• Shock-resistant aluminum oval horn
• IP65 standards compliant for dust and water-resistance
• Wide temperature range: -20°C to 55°C (-4°F to 131°F)
• Steel mounting brackets for easy installation and aiming in wall, pole
or ceiling-mount applications
TOA's SC-651 Paging Horn Speaker, rated at 50W, is designed
especially for outdoor applications. The SC-651 speaker features
newly developed diaphragms employing special heat-resistant
polyimide film to prevent the diaphragm from absorbing moisture and
changing shape, as well as to improve the low frequency
characteristics. High speaker efficiency has also been realized by
minimizing the gap produced when the diaphragm bobbin is installed
in the magnetic circuitry slit.
The SC-651 features TOA's unique oval shape, which enhances
excellent speech clarity.
The mounting bracket, bracket holder and the horn flare are treated
with 50-micron thick powder paint coating, which is about three times
thicker than that of the conventional horns and external hardware
(screws, bolts, nuts) are made of stainless steel. All of these factors
combine to ensure the speaker's excellent weatherproofing and
corrosion resistance. In addition, the external horn flare is made of
aluminum which is more shock-resistant than resin.
430 (16.93")
327 (12.87")
3 (0.12")
16Ω
BLK
WHT
BLK
WHT
600 (23.62")
100
(3.94")
51 (2.01")51 (2.01")
37 (1.46")
3–ø11 (0.43")
206 (8.11")
159 (6.26")
297.5 (11.71")
277 (10.91")
Wiring diagram
Rear View
Front View
Bracket dimensional diagram
Side View
Unit: mm
SPECIFICATIONS
Rated Input: 50W (Mobil Mount use: 30W)
Rated Impedance: 16Ω
Sensitivity: 109dB (1W, 1m)
Frequency Response: 250 – 6,000Hz
IP Code: IP65
Polarity: Hot: Black, Com: White
Operating Temperature:
-20°C to +55°C (-4°F to 131°F)
(must be free from dew condesation)
Finish: Horn flare: Aluminum, off-white, powder coating
Reflector horn: ABS resin, off-white
Bracket holder: Aluminum, gray, powder coating
Bracket: Steel, gray, powder coating
Rear cover: ABS resin, gray
Screws and bolts: Stainless steel
Speaker cable: Polyvinyl chloride insulated
cabtyre cable (6 mm (0.24") in diameter,
600 mm (23.62") in length)
Dimensions: 430 (W) × 297.5 (H) × 327 (D) mm
(16.93" × 11.71" × 12.87")
Weight: 3.4kg (7.50 lb)
Specifications are subject to change without notice.
(0806) 833-62-253-60 u
TOA Corporation
www.toa.jp
TOA Corporation SC-651 2/2
horizontal
vertical
Polar Response
270°
0°
330°
300°
240°
4000Hz
8000Hz
210°
150°
120°
90°
60°
30°
10
0
-10
-20
-30
-40
-40
-30
-20
-10
0
10
270°
0°
330°
300°
240°
500Hz
1000Hz
2000Hz
210°
180°
150°
120°
90°
60°
30°
10
0
-10
-20
-30
-40
-40
-30
-20
-10
0
10
270°
0°
330°
300°
240°
4000Hz
8000Hz
210°
150°
120°
90°
60°
30°
10
0
-10
-20
-30
-40
-40
-30
-20
-10
0
10
270°
0°
330°
300°
240°
500Hz
1000Hz
2000Hz
210°
180°
150°
120°
90°
60°
30°
10
0
-10
-20
-30
-40
-40
-30
-20
-10
0
10
Frequency Response (1W/1m)
Frequency
Sensitivity
[dB]
110
100
90
80
70
100
500 1k 5k 10k 20k
[Hz]
120
ARCHITECTURAL AND ENGINEERING SPECIFICATIONS
SC-651
The specified horn speaker shall be designed especially for
outdoor applications. The paging horn speaker shall be a
double re-entrant design suitable for paging and tone signaling
distribution. The speaker component shall be a compression
driver with a polyimide diaphragm to prevent deformation from
heat and improve low frequency characteristics. Power
handling shall be 50 W. Rated impedance shall be 16 ohms.
The sensitivity measured at 1m with 1 W of power applied from
500 to 2,500 Hz shall be 109 dB. Frequency response shall be
250 to 6,000 Hz. Horizontal and vertical dispersion at -6 dB
below the on-axis reference at 2k Hz shall be 55°(H) × 45°(V).
The paging horn shall comply with the IEC IP65 standard for
dust and water resistance and operate within a temperature
range from -20°C to +55°C (-4°F to +131°F). The speaker shall
feature shock-resistant aluminum oval horn. The mounting
bracket, bracket holder and the horn flare shall be treated with
50-micron thick powder paint coating, and external hardware
(screws, bolts, nuts) shall be made of stainless steel. The
paging horn shall include an integral speaker cable, insulated
polyvinyl chloride type, with strain-relief, 6 mm (0.24")
diameter and 600 mm (23.62") length.
Dimensions shall be 430(W) × 297.5(H) × 327(D) mm (16.93" ×
11.71" × 12.87").
Weight shall be 3.4 kg( 7.50 lb)
The paging horn shall be TOA model SC-651.
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