Spon NAC-2503 User manual
Horn Speaker Quick Installation Guide
1.Summary
（1）NAC-2503 is a kind of high-power, waterproof and corrosion proof plastic horn speaker
with large diameter. It is of excellent voice quality and efficient sound transmission,
long-distance sound transmission. It is applicable to the stadium, swimming pools, exhibition,
industrial square,etc occasions for 24-hours outdoor using.
（2）NAC-2503 can be connected to the 100V line output. The 100V transformer is a jumper
connector for the primary winding and it can be used for different power settings.Users can
easily obtain two power options.
2.Specifications, Functional Parts,and Parameters
Electricit
y
Speaker unit
Waterproof oriented speaker
MAX power
40W
Rated power（PHC）
30W
Sensitivity
（1kHz,1m）
113dB±2dB
Effective frequency
response（-10dB）
250-8kHz
Rated voltage
100V
Input interface
3-core cable
Wiring terminal color
Brown,yellow green,blue
Finished
product
Product size
285(L)×285(W)×210(H)mm
Production weight
1.8 Kg
Packing size &
weight(1Pcs)
315(L)×258(W)×308(H)mm 2.3 Kg
Packing size &
weight(4Pcs)
730(L)×380(W)×305(H)mm 11.5 Kg
Installation method
Screw mounted base
Material
Horn speaker
White plastic
Bracket
White steel paint
Working
environm
ent
Working temperature
-25℃to +55℃
Storage Humidity
-40℃to +70℃
Relative humidity
﹤95%
Horn Speaker Quick Installation Guide
3.Appearance Dimensions
4.Schematic Circuit Diagram
Wiring description:
Amplifier output COM connect with the yellow green line during wiring, and the 100V
amplifier output need connect with the corresponding line.
30W rated power: amplifier COM connect with yellow green line , and 100V amplifier
output need connect with brown line.
15W rated power: amplifier COM connect with yellow green line , and 100V amplifier
need connect with blue line.
5.Installation Diagram
Horn Speaker Quick Installation Guide
6.Fault Maintenance
Fault Phenomenon
Fault reason & exclude
Sound small , even no
sound
Check if the wiring of the horn speaker is correct, tight and
no shorting. With the power selection, please confirm if the
power switch has been adjusted to the right position (in
addition, wiring should be left with some certain margin to
avoid the horn internal siring damage.
Quality is not good and
there is noise.
Check if the input signal source of amplifier and input
transmission joint is correct. In addition, the horn speaker
should be tightly fixed, otherwise, the resonance will be
generated which can result in bad sound quality.
7.Packing List
（1）Quick installation guide 1PCS
（2）NAC-2503 Horn Speaker 1PCS
（3）Warranty card and certificate 1PCS
