【 Weak current College 】 professional power amplifier and household power amplifier differences---Power By 【 China power house network 】

Professional amplifier and differences in household power amplifier
I believe a lot of sound fans have seen professional power amplifier and household power amplifier for electricity principle diagram. If only from the electrical schematics, it appears that the professional power amplifier and household power amplifier is no significant difference. Or from the use of perspective, both are used to drive speaker playback, it seems to be the same. From a performance perspective, the diligent and professional power amplifier of basic performance indicators are also similar. In fact, the amplifier and household power amplifier have many differences. Professional power amplifiers are long, continuous work in high power mode, so the professional power amplifier requires power margin, high reliability, output level temperature rise of smaller, better stability of the circuit. To meet such a request, the amplifier in the design, materials, wicked, etc. are different from home amplifier special consideration. For example, professional power amplifier power circuit capacity is often based on the actual consumption of the amplifier, plus enough rich content, and therefore better than the same nominal power of the capacity of the domestic power amplifier. Professional amplifier of high power devices are often choose maximum current and voltage is higher than the rated value of specifications, the output stage of the radiator also adopts large exposed radiator in order to facilitate heat dissipation and guarantee the inequality of temperature rise time at work is relatively low. If we look at rated output power is 2 100W× professional power amplifier and household power amplifier, you can find professional power amplifier of the radiator. This is because although household power amplifier with a nominal rated output power 100W, but actual use often only work in smaller output power of the State (General average power about 10W or so). Only some of the hottest music of sudden peak signal is possible in a short time to reach dozens watt output power. Thus household power amplifier output stage of the actual workload. The rated output power to the amplifier 100W, often in actual use often meet near the "full power" status, actual work load heavier, so the output level of a fever, need a larger radiator for good heat dissipation. From the amplifier design requirements, household amplifier often relatively quiet family environments, typically used for music and media playback. Home of HI-FI amplifier also to a truly provides the music of "original sound", the requirements to the hottest musical level and details. Thus household power amplifier on sound fidelity requirements are higher, and requires the sound softer, meticulous, pleasing to the ear. Professional power amplifiers are often used for big occasions of sound reinforcement, for driving professional speaker playback, and therefore require their driving ability, output power and sound bright and clear, and adequate. Therefore the sound characteristics of both a degree of difference. However, there is some very senior professional power amplifier is also a focus on broadcasting sound fidelity, to tie in more senior professional speaker, broadcasting out of sound is more clear, detailed, and also a better sense of depth. From the feature set, the professional power amplifier are often combined with a mixer, fore device, so much as plain after the class amplifier. Professional amplifier setting is very simple, often Panel only power switch and output level adjustment potentiometer (or step attenuator). But because the amplifier's real needs, often can work in two-channel status, or "bridge," a mono amplifier, so professional power zoom multiple settings "bridging" switch. Home power has many models are equipped with the front-stage amplifier "merge" amplifier, the merge type amplifiers feature more often with audio source selection, monotonous control, multiple audio input interface, etc. The status of work from the amplifier, professional power amplifier efficiency focused amplifier, so mostly AB class amplifier. Home power amplifier is the AB class amplifier, or "high" partial class AB amplifier, use A class amplifier, also with dynamic biasing A kind of "super" amplifier. From the output power, the amplifier output often larger, single output power greater than can be up to 1000W. Home power amplifier's rated output power is mostly 200W.