Weak current College】 【acoustic impedance-in - Power By】 【China power house network.

<br> Impedance is the audio ring most frequently seen in words, but it is intended that he means? many people see loudspeaker impedance values are shown for four or eight-ohm, will intuitively picked up three use the meter to the Horn of a .second terminal, take a look at the end is not correct, unfortunately most people are disappointed, because three use meter amount of electric resistance stalls the result did not and speaker mark above. Reasons? because you're mistaken, you are wrong. Impedance .and resistance is not completely consistent East. In the State of physics textbooks, our first contact with the electrical theory, which refers to the voltage, current, resistance and power between theory and mathematical relationships. The vast majority not to pursue a course of electrical .or electronic profession, his lifelong dedication to do electrical knowledge is concerned, this is when the class didn't sleep, after efforts, serious and hard to have brilliant results, no wonder you will put the impedance as resistance. Impedance literally and resistance, .of which only a stop word is the same, and another against Word? simply put, the impedance is resistance combined with reactor, so we called impedance; distribution point, the impedance is resistance, capacitance and inductance of resistance in the vector and. In .DC world, objects on the current role of the obstacle is called resistance, all substances have resistance, resistance values of size differences. A substance called resistance conductor resistance and great substance called a non-conductor, and recently in the high tech field called superconductors ., is a kind of resistance values to zero. But AC field in addition to resistance prevents current, capacitance and inductance also impede the flow of electric current, this role is called reactor, meaning the resistance current role. Capacitance and inductance capacitor reactance respectively called .on short resistance, inductance and capacitance and inductance. Their measurement units is the same as with the resistance, ohm whose value is the size and frequency of the alternating current, frequency, the higher the capacity less resistance gankang, the greater the frequency, the .lower the capacitance, the greater the feeling less resistance. In addition capacitor resistance and inductance of the phase angle is also issues, with the vector of relation, will say: impedance is the resistance and inductance of the vector. General audio equipment commonly cited impedance .of loudspeaker impedance, pre-amp expanding machine input impedance, fore output impedance, (after the class is typically not called output impedance, and that output resistance), signal wire transfer impedance (or characteristic impedance), etc. If the equipment's internal electronic .circuit and part of the various parts of the impedance that many more superb complex, non-few words can explain it clearly. Here we post only briefly describes the impedance of the audio equipment marked with what kind of real meaning. Due to the impedance of .the units still ohm, Ohm's law also applies, in short, in the same voltage, the higher will flow through the impedance less current, the lower the impedance will flow through the more current. Light is as simple as a sentence, do you know .how many audio equipment matching learning in which? from the loudspeaker impedance. The most common to the loudspeaker impedance 8 ohm value is shown, there are also many is 4 ohms, this represents the? this represents the trumpet in a factory test rules, when .the input signal by a sine wave 1KHz, it renders the impedance value is 4 or 8 ohm; or is in the Horn of frequency response range, an average of impedance value. It is not a fixed value, but rather as the frequency of, .and may even be rolling scary and may to a certain frequency to 10 20 few Ohms or lower a frequency to a Ohms or less (this Horn is generally regarded as the killer after level, to the most famous Apogee). Well, let's brainstorm about .; when a fixed after level output voltage to the trumpet, according to Ohm's law, 4 ohm speakers than the eight-ohm speakers more electricity flowing through a times, so if you are computing power, and you'll understand why the market will be .rumors a eight-ohm output 100 Watt Crystal after the class, in four-ohm speakers connected automatically to 200 watts. But you don't, that was cheap, Grand don't come for free, when the speaker impedance value all the way .down, after a fixed voltage level output, it will flow through the current increasing, you determine your level can output after so much current? you know all the way down the loudspeaker impedance to the later on the results a bit like a loudspeaker cable directly .short-circuiting of meaning, and thus lower impedance values sometimes low-ohm speakers called Apogee after the class killer, you understand! all Crystal after the class extending machine, its output current capability has its design constraints, outside this range, the machine will .be burned. This is why most people often say: after the level of power is not big, but the output current to big it is were it not for the reason (this issue we will discuss in detail later). Similarly, if a speaker .impedance is high, like the early 15 RogersLS 3/5A, then expand the machine output power would not automatically by half? Yes! if the efficiency of the Horn is low, you should send it to the treble pressure, can not use extended machine .with high power? and Lakes there are rumors: rise of the records in the North Zhongshan Road, Taipei City Centre has a pair of Rogers 15 LS 3/5A, used as background music. Push its expanding machine is a Japan early comprehensive expansion machine .Technics, but including Liu, Lai editor-in-Chief, managing directors and are highly praised it well, you say? early Japan to expand the machine gave the impression that is power indication is very high, but the output current capability of the quite .diplomats, don't you see the small set of bedside stereo mix still is 300W? but KRELL's after the class you want to 300W a person is carrying and carried. This high-voltage and low current in Japan to expand the machine a meet now .styling are all low-impedance speaker, soft foot at once, but if you run into a high-impedance speakers, for example ... Will it become a veritable when Harry met Sally? collocation of! how can sit idly by..