Model:HD-80DLY/120DLY
Power Amplifier
Your Professional Power Amplifier Supplier
Ningbo Feilep Technology Co.,Ltd/Ningbo Jiuyin Electrical Co.,Ltd. was established in 1984. The company has been committed to the development, production and sales of PA system Speakers and Power Amplifiers
With a dynamic R&D team and a wealth of experience, we pride ourselves on our ability to cater to our customers' every need-be it in product design, artwork, structure, sound style, quality, performance reliability, or pricing. Under the banner of FEILEP, our products have carved out a solid reputation in the global market, thanks to their exceptional cost-to-performance ratio.
Why choose us
Production Equipment
We have 12 high-end injection molding machines and 7 production lines and 80 skilled workers to ensure production efficiency. All injection molding and transformers are done by ourselves to save costs and ensure quality.
High Quality
In terms of quality, our company has 50 qualified QC personnel to conduct strict inspections on functions and appearance, etc.
Research and Development Capabilities
At FEILEP, we boast a highly skilled R&D team of seven engineers dedicated to delivering comprehensive design solutions for professional digital sound systems. Our expertise spans acoustics, electronics, software, mechanics, and industrial design. Equipped with industry-leading R&D facilities, testing equipment, and an anechoic chamber, we have successfully registered over 15 invention and utility model patents.
Professional Service
We provide our partners with comprehensive professional services and support, regardless of their location. At FEILEP, we strive to facilitate a seamless experience for our customers in selecting, testing, and utilizing our products. Our offerings range from product catalogs and professional audio proposals to logistics and after-sales support, ensuring that your experience with FEILEP is centered on achieving exceptional performance.
Power Amplifier
An electronic circuit exists that enhances the strength of an incoming signal, referred to as a power amplifier. In contrast to small-signal amplifiers, which concentrate on boosting voltage or current while preserving smoothness, power amplifiers are engineered to deliver robust output with minimal aberration. They find extensive utility in situations demanding a substantial augmentation of signal potency, such as managing audio system speakers or transmitting wireless signals over extended distances.
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Power Amplifier |
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Output Power |
20-34kHz, 1W with 1 KHz |
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8ΩStereo Power(RMS) |
625WX4 |
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4ΩStereo Power(RMS) |
1250WX4 |
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2ΩStereo Power(RMS) |
1500WX4 |
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8ΩBridged Power(RMS) |
2500WX2 |
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4ΩBridged Power(RMS) |
3000WX2 |
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Frequency Response(+o/-0.3dB,1W/8Ω) |
20 Hz - 34 kHz |
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THD 20 Hz - 20 kHz for 1 W |
<0.1% |
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Signal-to-Noise Ratio |
>112 dBA |
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Class |
TD |
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Channel separation (Crosstalk) at 1 kHz |
>70 dB |
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TourClass Protection |
Short circuit, DC voltage, turn-on/off transient, current inrush |
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Operating voltage |
130-265 V / 65-135 V selectable |
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Voltage Gain(dB) |
23, 26, 29, 32, 35, 38, 41, 44 dB selectable |
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Input impedance |
20 Kohms |
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Input Connectors (per channel) |
3-pin XLR, electronically balanced |
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Output Connectors (per channel) |
Binding Posts 2-pole |
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Level adjustment (per ch.) |
Front-panel potentiometer, 31 position detented from -inf to 0 dB |
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Net weight(kg) |
13 |
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Gross weight(kg) |
18 |
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Dimensions (W×H×D) |
483×88×396mm |
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Packing dimension |
580×180×560mm |
Advantages of Power Amplifiers
Signal Amplification: It enhances the strength of an incoming signal making it suitable for operating the devices like speakers for delivering of high-quality and clean signal.
Enhancing the audio quality: Power amplifiers helps in improving the sound quality of the system. This is achieved due to the less distortion and high linearity of the system. For eg. Class A and Class AB Power Amplifier are suitable for improving the sound quality.
Efficiency: Power amplifiers reduces the power loss and hence improving the efficiency. In case of Class B Power Amplifier, there is no power loss under quiescent circumstances.
Wide Range of Applications: It finds its use in diverse applications like audio amplification, RF signal transmission, consumer electronics, telecommunications, and industrial sectors, etc.
Customizability: There are various classes of Power Amplifier available. Each classes has its own specification. This helps the designers to develop the configurations according to the system need.
Type of Power Amplifier
01
Audio Power Amplifiers
It is designed for amplifying audio signals. These amplifiers are commonly used in speakers, televisions, and mobile phones, etc, to increase the power of weak audio signal. It ranges from few milliwatts to thousands of watts.
02
Radio Frequency Power Amplifiers
It is used in radio frequency applications. The range of wireless transmissions, which rely on antennas to send modulated waves over large distances, is influenced by the signal strength. Antennas need input signals that are thousands of kilowatts in power to broadcast FM. Power amplifiers are used to boost the power so that the modulated waves go to the necessary distance.
03
DC Power Amplifiers
DC power amplifiers amplify PWM signals in electronic control systems for high-power motors or actuators. They increase input power from microcontrollers and send amplified signals to DC motors or actuators, ensuring they are driven effectively.
Applications Of Power Amplifiers
Satellite Communication
Power amplifiers are essential components in satellite communication systems. They are used to amplify the signals transmitted from the satellite to the ground station and vice versa. Power amplifiers ensure that the signals are strong enough to overcome the long distances and atmospheric attenuation encountered in space communication.
01
Radar Systems
Power amplifiers are integral to radar systems used in aerospace applications. They amplify the radar signals to high power levels, allowing for long-range detection and accurate target tracking. Power amplifiers in radar systems need to provide high output power, wide bandwidth, and excellent linearity to ensure reliable and precise radar operation.
02
Aircraft Communication Systems
Power amplifiers are employed in aircraft communication systems, such as VHF (Very High Frequency) and UHF (Ultra High Frequency) radios. They amplify the signals transmitted by the aircraft's communication equipment, enabling clear and reliable communication between the aircraft and air traffic control or other aircraft.
03
Electronic Warfare Systems
Power amplifiers are utilized in electronic warfare systems, which involve the use of electronic signals to disrupt or deceive enemy radar and communication systems. Power amplifiers in electronic warfare systems provide high power output to jam or overpower enemy signals, ensuring the effectiveness of electronic warfare operations.
04
Space Exploration
Power amplifiers are critical components in space exploration missions. They are used in communication systems to transmit data from spacecraft to Earth and vice versa. Power amplifiers ensure that the signals are strong enough to overcome the vast distances and signal degradation encountered in deep space missions.
05
How it works of Power Amplifier
Input Stage
The input stage of a power amplifier receives the low-power input signal. This stage typically includes a pre-amplifier that amplifies the weak input signal to a level suitable for further amplification. The pre-amplifier may also perform impedance matching to ensure efficient transfer of the signal to the subsequent stages.
Output Stage
The output stage of a power amplifier is responsible for driving the load, such as a speaker or antenna. It provides the necessary current and voltage levels to deliver the amplified signal to the load. The output stage may include additional impedance-matching components to optimize the power transfer to the load.
Amplification Stage
The amplification stage is the heart of the power amplifier. It consists of one or more active devices, such as transistors, arranged in a specific configuration. These active devices receive the amplified signal from the input stage and further increase its power level. The amplification stage operates in a specific amplification mode, such as Class A, Class B, Class AB, or Class D, depending on the desired trade-offs between efficiency, linearity, and distortion.
Biasing and Control Circuitry
Power amplifiers often include biasing and control circuitry to ensure proper operation and stability. Biasing circuits provide the necessary DC bias to the active devices, ensuring they operate within their linear range. Control circuitry may include feedback mechanisms to regulate the output signal and protect the amplifier from overloading or overheating.
Technical index of Power Amplifier
Rate power: Refers to the continuous sine wave power. Under 500Hz sine wave input and a certain load, the harmonic distortion is less than 1% of the output power, expressed as W/CH (watts per channel). Generally speaking, the higher the rated power, the higher the cost.
Total harmonic distortion (THD): Refers to the percentage of high-order harmonics to the fundamental wave. The smaller the total harmonic distortion, the better. The total harmonic distortion of a good power amplifier can reach 0.02%
Slew rate: The voltage amplitude rising per unit time, in volts/microsecond. It reflects the power amplifier's ability to track transient sound signals and is a transient characteristic index.
Damping factor: It is defined as the load impedance of the power amplifier (the internal resistance of the high-power tube plus the wiring resistance of the speaker), such as 8Ω: 0.04Ω=200:1. Generally, the ratio is relatively large, but it cannot too large, or it will make the speaker sound thin.
Output impedance (or rated load impedance): Usually 8Ω, 4Ω, 2Ω, etc. The smaller the value, the stronger the load capacity of the power amplifier. In terms of a single channel, a power amplifier with a rated load of 2Ω can drive 4 speakers with an impedance of 8Ω to produce sound with very little distortion.
Performance index of Power Amplifier
Output Power
Rated power (RMS): It refers to the maximum power that the power amplifier can output for a long time within a certain harmonic range (strictly speaking, it is a sine wave signal). The average power when the harmonic distortion is 1% is often referred to as rated output power or maximum useful power, continuous power, undistorted power, etc. Obviously, when the prescribed distortion conditions are different, the rated power value will be different.
Maximum output power: When the distortion is not considered, the output power of the power amplifier circuit can be much higher than the rated power, and it can also output a larger value of power. The maximum power it can output is called the maximum output power.
Music power output (MPO): MPO is the abbreviation of Music Power Output. It refers to the power output of the power amplifier circuit when working with music signals, that is, when the output distortion does not exceed the specified value, the instantaneous maximum output power of the music signal.
Peak music power output (PMPO): It is the maximum music power output and another dynamic indicator of the power amplifier circuit. If the distortion degree is not considered, the maximum music power that the power amplifier circuit can output is the peak music output power.
Frequency response
The frequency response reflects the power amplifier's ability to amplify each frequency component of the audio signal. The frequency response range of the power amplifier should not be lower than the auditory frequency range of the human ear. Therefore, under ideal circumstances, the operating frequency range of the main channel audio power amplifier is 20 -20000Hz. According to international regulations, the frequency range of a general audio power amplifier is 40-16000Hz±1.5dB.
Distortion
Distortion is a phenomenon in which the waveform of the reproduced audio signal changes. There are many causes and types of waveform distortion, mainly including harmonic distortion, intermodulation distortion, and transient distortion.
Dynamic Range
The ratio of the minimum signal to the maximum signal level of the amplifier without distortion is the dynamic range of the amplifier. In actual application, the ratio uses dB to represent the level difference between the two signals, and the dynamic range of the high-fidelity amplifier should be greater than 90dB.
Signal to noise ratio
The signal-to-noise ratio refers to the proportional relationship between the size of the sound signal and the size of the noise signal. The decibels of the ratio of the output sound signal level of the attack amplifier circuit to the various output noise levels is called the signal-to-noise ratio.
Output impedance and damping coefficient
Output impedance: The equivalent internal impedance shown by the output end of the power amplifier and the load (speaker) is called the output impedance of the power amplifier;
Damping coefficient: The damping coefficient refers to the ability of the power amplifier circuit to resist the load.
FAQ
As one of the leading power amplifier manufacturers in China, we warmly welcome you to buy customized power amplifier made in China here from our factory. Good service and quality products are available.
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