The Difference Between Professional Power Amplifier and Household Power Amplifier

- Oct 17, 2018-

Professional amplifiers generally need to work in a high-power state for a long time, so professional power amplifiers require large power headroom, high reliability, and small temperature rise at the output stage, and good circuit stability. In order to meet such requirements, amplifiers have special considerations different from home amplifiers in terms of design, materials, and ethics. For example, the capacity of a power amplifier circuit of a professional power amplifier is often based on the actual consumption of the amplifier, plus a sufficient margin, and therefore a much larger capacity than a home power amplifier of the same nominal power. The high-power devices of professional power amplifiers often choose larger currents and voltages than those with higher rated values. The output stage heat sinks also use large-scale exposed heat sinks to facilitate heat dissipation and ensure temperature rise during inequality time work. Lower. If we look at professional power amplifiers and home amplifiers with a rated output power of 100W×2, we can find that the radiators of professional amplifiers are much larger. This is because the household power amplifier has a nominal rated output power of 100W, but in actual use, it only works in a state of smaller output power (generally uniform power is about 10W). It is only possible to reach tens of watts of output power in a short period of time when delivering bursty peaks of certain music. Therefore, the actual working load of the household power amplifier output stage is lighter. Professional power amplifiers with a rated output power of 100W often reach a near-full power state in actual use, and the actual working load is heavier. Therefore, the output stage has a higher heat generation, and a larger heat sink is required to perform well cooling.

From the design requirements of the amplifier, the home amplifier is often used in a quieter home environment, usually used for music appreciation and film playback. The home HI-FI amplifier is designed to deliver the "original sound" of the music more realistically, requiring the level and detail of the music to be delivered. Therefore, the home amplifier has a higher requirement for the fidelity of the sound, and requires the sound to be softer, more meticulous and pleasant. Professional amplifiers are often used for sound reinforcement in large occasions, which are used to drive professional speakers. Therefore, they require strong driving capability, sufficient output power, and bright sound, clear and sufficient strength. Therefore, the sound characteristics of the two also have certain differences. However, at present, some high-quality professional power amplifiers pay more attention to the fidelity of the sound. If combined with high-quality professional speakers, the sounds that are delivered are clearer, more detailed, and better in layering.

From the point of view of function setting, professional power amplifiers often work with preamplifiers such as mixers, so they are mostly pure post-stage amplifiers. The setup of professional amplifiers is simple, and there are often only power switches and output level adjustment potentiometers (or step attenuators) on the panel. However, due to the actual needs of professional power amplifiers, it is often possible to work in a two-channel state, or to become a mono amplifier after "bridging", so the professional power amplifier is often provided with a "bridge" switch. There are many models of home amplifiers that are "combined" amplifiers with preamplifiers. This combined amplifier has many functions, often with audio source selection, monotonic control, and multiple audio input interfaces.



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