Professional Amplifiers Specifications, Distortion and Dynamic Range

Both AV amplifiers and Hi-Fi power amplifiers have very strict requirements on Professional Amplifiers and have clear requirements in terms of output power, frequency response, distortion, signal-to-noise ratio, output impedance, and damping coefficient.

Here is the content list:

• Specifications for Professional Amplifiers

• Distortion for Professional Amplifiers

• Dynamic Range of Professional Amplifiers

Specifications for Professional Amplifiers

1. The rated power refers to the continuous sine wave power. Under 500Hz sine wave input and a certain load, the output power with harmonic distortion is less than 1% and is expressed as W/CH (Watt/channel). Generally speaking, the higher the rated power, the higher the cost.

2. Total harmonic distortion refers to the percentage of higher harmonics in the fundamental wave. The smaller the total harmonic distortion, the better, and the total harmonic distortion of good Professional Amplifiers can reach 0.02%.

3. The conversion rate is the voltage amplitude rising per unit of time, and the unit is volts/microsecond. It reflects the ability of the power amplifier to track the transient sound signal and is a transient characteristic indicator.

4. The damping factor 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). Generally, the ratio is required to be relatively large, but it should not be too large. If it is too large, the speaker's sound will be thin. If it is too small, the sound level will be poor and the sound image distribution will be poor.

5. The output impedance usually has values such as 8Ω, 4Ω, 2Ω, etc. The smaller the value, the stronger the load capacity of the power amplifier. As far as a single channel is concerned, a power amplifier with a rated load of 2Ω can drive 4 speakers with an impedance of 8Ω, and the distortion is very small.

Distortion for Professional Amplifiers

Distortion is a phenomenon in which the waveform of a reproduced audio signal changes. There are many reasons and types of waveform distortion in Professional Amplifiers, mainly harmonic distortion, intermodulation distortion, and transient distortion.

Dynamic Range of Professional Amplifiers

Professional Amplifiers amplify without distortion. The ratio of the smallest signal to the largest signal level is the dynamic range of the amplifier. In practice, 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 90 dB.

Various noises in nature form the surrounding background noise, and the surrounding background noise and the sound intensity of the performance are very different. In general, this intensity difference is called dynamic range. A good audio system should not produce overload distortion when inputting a strong signal. And when inputting a weak signal, it should not be overwhelmed by the noise it generates itself. For this reason, a good sound system should have a large dynamic range, and the noise can only be reduced as much as possible, but it is impossible not to produce noise.

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