Cookies Setting
We use cookies to improve your browsing experience, analyze traffic, and personalize content. By using this site, you agree to our use of cookies. For more details, please check our Cookie Policy.
Professional Amplifier
Professional Power Amplifier
Professional Power Amplifier
Professional Power Amplifier
Professional Power Amplifier
Professional Power Amplifier
Professional Power Amplifier
Professional Power Amplifier
Professional Power Amplifier
Professional Power Amplifier
Professional Power Amplifier
SAP-5402A35/A50/A70
Professional Power Amplifier
  • 1U Design
  • 90% Efficient
  • PFC Power Supply
  • Comprehensive Protection
Professional Power Amplifier – High Efficiency & Compatibility
With ultra-low standby power consumption of just 4W and up to 90% working efficiency, this professional power amplifier delivers reliable performance while reducing energy waste. The universal PFC power supply supports worldwide voltage ranges and minimizes interference to the power grid, making it ideal for global installations in PA systems, conference audio, and professional sound reinforcement. Equipped with a built-in peak limiter, this amplifier prevents speaker damage from clipping. The indicator alert system notifies users to lower the volume when necessary, ensuring safe and consistent sound quality. Perfect for live events, commercial audio systems, and large-scale public address applications.
 
1U Ultra-thin Rack-mounted Design Compact 1U slim chassis featuring a sleek, modern, and minimalist design.
 
High PerformanceStandby power ≤ 5W; up to 90% efficiency; universal PFC for global use.
 
Comprehensive Protection Lightning surge, over/undervoltage, overload, short circuit,and compression limit protection.

Professional Power
Amplifier

Efficient Power, Excellent Performance

 
Comprehensive Protection
 
1U Ultra-Slim Rack
 
High Performance
 
Overheat & Peak Protection

1U Ultra-Thin Rack-
Mounted Design

Streamlined and modern design, occupying minimal rack space.

High Performance

• Standby power as low as 5W
• Up to 90% overall operational efficiency
• PFC power supply suitable for global use

Comprehensive Protection

• Lightning surge protection
• Other Protection: high-frequency, overvoltage, undervoltage, overload, short circuit, and compression limit.

Innovative Design
Highlight

• Built-in overheat level control
• Built-in peak level limiter
• External fuse box design

PARAMETER
Parameter
Specifications
Parameter
A35/A50/A75
Power Supply Range
AC100~240V 50Hz~60Hz/AC 220V 50Hz/AC 220V 50Hz
Surge Protection
Differential mode: 1KV, Common mode: 2KV
Standby Power Consumption
< 5W/< 8W/< 8W
Power Output Consumption (1/8)
120W/180W/235W
Power Output Consumption (1/3)
280W/430W/540W
Output Power (8Ω)
350W×2 (1)/500W×2 (1)/700W×2 (1)
Output Power (4Ω)
700W×2/1000W×2/1200W×2
Output Power (BTL)
700W×1 (2)/1000W×1 (2)/1200W×1 (2)
Frequency Response
20Hz-20KHz
Total Harmonic Distortion
< 0.05% @1KHz 1/3 power output
Signal-to-Noise Ratio
≥ 100dB(A-weighted)
Input Impedance
Balanced 20KΩ / Unbalanced 10KΩ
Input Sensitivity
0.775Vrms / 1.414Vrms
Max Input Level
3.5Vrms (13dBu)
Gain
36.7dB
Interfaces
2 line inputs, 2 line outputs, 2 power outputs
Operating Temperature & Humidity
0℃-45℃, ≤90%RH (non-condensing)
Product Dimensions
300.5 x 483.4 x 44.5(mm)
Packed Dimensions 
573*368*123(mm)
Gross Weight
4.8Kg
FAQS
Q1: The description mentions several protection features, including a peak limiter and overheat control. How do these protect my speakers and the amplifier itself?
The amplifier incorporates multiple protection circuits to safeguard both the amplifier and connected speakers from damage:
Peak Limiter: This circuit prevents the amplifier from outputting signals that are too strong ("clipping"). Clipping can cause distortion and, more importantly, can damage speakers, especially tweeters. The clipping indicator light warns you if the input signal is too high, allowing you to reduce the volume before damage occurs.
Overheat Level Control: Instead of simply shutting down when it gets too hot (which would interrupt the audio), this feature automatically reduces the output level if the amplifier's internal temperature reaches a critical point. This allows the amplifier to continue operating, albeit at a lower volume, until it cools down. This prevents abrupt audio interruptions.
Other Protections: The amplifier also includes protection against other potentially damaging conditions:
Soft Start: Gradually increases power on startup, preventing sudden surges.
DC Protection: Protects speakers from direct current (DC) voltage, which can damage them.
High-Frequency (HF) Protection: Protects against excessively high-frequency signals.
Over/Under Voltage Protection: Protects against voltage fluctuations from the power outlet.
Overload/Short Circuit Protection: Protects against excessive current draw.
Limiting: Prevents the output signal from exceeding safe levels.
Overheat Protection: Shut down when reaching setting temperature.
These comprehensive protection features ensure reliable operation and long-term durability.
Q2: What is a PFC power supply?
PFC stands for Power Factor Correction. A power supply with PFC is more efficient and puts less stress on the electrical grid. It offers several advantages: Universal Compatibility: It can operate on a wide range of AC input voltages (typically 100-240V) and frequencies (50/60Hz), making it suitable for use worldwide without needing voltage converters. Reduced Grid Interference: It minimizes harmonic distortion on the power line, which can interfere with other electronic equipment. Improved Efficiency: It draws power from the AC line more efficiently, reducing energy waste. Stable voltage input: PFC provide stable voltage to the system.
Documents Download
related Cases
Al Faris International Schools
SPON provided a IP PA solution for 160 classrooms and outdoor zones, featuring IP ceiling and horn speakers, paging microphones, and centralized management for smarter campus communication.
Read More
Hadab Hotel
SPON IP PA System Enhances Audio Communications in Hadab Hotel
Read More
Phra Nang Klao Hospital
Enhancing Safety at Phra Nang Klao Hospital with SPON's IP Intercom System
Read More
Ecuador Smart City
SPON’s Emergency Call Box solution for Ecuador’s Smart City project. Features include one-touch emergency alerts, visual intercom, emergency broadcasting, and durable outdoor design to enhance urban safety and connectivity.
Read More
Xiamen Overseas Port
Discover how SPON provided an Intelligent Dispatch and Seaport IP Intercom System for Xiamen Overseas Automated Port, integrating IoT, intercom, video communication, and emergency response to enhance safety, scheduling, and operational efficiency.
Read More
Xinjiang Museum
SPON's Surveillance Microphone System Boosts Xinjiang Museum's Security.
Read More
Ankang Hospital
SPON's IP PA and Intercom System Elevates Ankang Hospital's Audio Communication.
Read More
Multi Purpose Hall Conference System
Free movement for speakers, clear sound, smart video, and easy system management.
Read More
Dafengyakou Highway
SPON IP PA & Intercom System enhances highway safety on the Dafengya Pass. Real-time road condition broadcasts, weather updates, patrol communication, and emergency assistance ensure safe driving on high-risk mountain highways.
Read More
Beijing Primary School
Discover how SPON directional speakers help schools achieve precise sound coverage in playgrounds. Ideal for noise control and clear announcements.
Read More
Humen Railway Station—IP PA System
SPON delivered IP PA System to Humen Railway Station, optimizing communication and passenger experience.
Read More
Automated Port
Guangxi Qinzhou Port employs SPON's IP Intercom System, Enhancing Clear Communication And Safety In Challenging Environments.
Read More
Xiamen Coastal Area
SPON’s Outdoor IP PA Intercom System designed for coastal areas. Provides background music, public announcements, emergency alerts, and two-way communication. Reliable, waterproof, and easy to manage.
Read More
China Merchants Bank—IP Surveillance Microphone
SPON deployed HD directional IP surveillance microphones for China Merchants Bank branches in Henan, ensuring high-definition audio, noise cancellation, and reliable incident evidence.
Read More
Heavy Industries Port
Improve safety and communication in industrial environments with SPON's IP intercom systems. Discover rugged outdoor video phones, emergency call stations, and smart IoT solutions for port operations.
Read More
China Agricultural Bank
SPON Enhances Counter Intercom For China Agricultural Bank.
Read More
Liaocheng School
How School built a smart and safe campus with SPON IP PA & Intercom System. Supports class bell ringing, music, exam broadcasting, emergency one-click intercom, and centralized management.
Read More
Huaihua University
Discover how University built a smart campus with SPON IP PA Paging System. Supports multi-classroom broadcasting, local PA, exam announcements, and one-button intercom for real-time technical support.
Read More
Hangzhou Asian Games
SPON supported the Hangzhou Asian Games with its reliable IP public address intercom system, providing information announcements, background music, emergency alerts, and one-touch assistance.
Read More