【 Weak current College 】 face speaker concept that consumers how to go out and buy---Power By 【 China power house network 】

Audio-visual systems market high-speed development, misleading propaganda and gradually increased

As living standards improve, more and more consumers in the home audio-visual equipment, trying to feel at home theater or concert hall of the audiovisual experience, this demand has greatly contributed to the prosperity of the audio-visual equipment market, but because some consumers on audio-visual equipment in the "tone" of this very abstract concept is not very understanding, on the other hand also gave some focused only on the profits of manufacturers offer a "money", in 2006 "3 · dawn of 15", little addendum to collect the current audio market some of the more common and some of the more rare manufacturers misleading publicity means hope for consumers to purchase sound equipment provide some proof "huyou" help.
In General, we often say audio equipment generally include an audio amplifier and speakers in these two categories of products, power amplifier for CD, DVD, audio source signal is decoded and power, then the processed signal through the speaker cables or wireless transmission technology transfer to the Terminal – speakers, speaker to be responsible only to replay sound, and the active sound box as in the case of built-in power amplifier circuit, so the need for separate power supplies for the power amplifier with power support, but they operate basically still the same.

In the speaker's purchase, consumers typically need some attention?
Output power better? reference listening environment is a scientific area

1: output power

Output power amplifier and speaker in the parameters of the example table, but more common in speaker, power to decide the speaker can emit the most loudly, feels is the speaker sound can be exerted.
Under the current common standards, the speaker's power a total two callout method: rated power (RMS) and peak power (PMPO). The former refers to the rated range driven a 8 ohm speakers provides continuous analog waveforms, at regular intervals and repeated after a certain number of times, the speakers without any damage to the maximum power; while the latter refers to the speakers for a short period of time can withstand the maximum power. In the United States Federal Trade Commission in 1974 the power calibration standard description: to two-channel driver an 8-Ohm impedance speakers within the 20Hz-20kHz harmonic distortion of less than 1% of measured effective wattage, the amplifier output power, their marking power is rated output power. But there are quite a few of the manufacturers in order to meet consumers ' pursuit of high power consumption, only marked the peak output power speaker, 8 times the rated power of the speaker selection process is not decisive in General.
In fact speaker output power is not a better, power is going to consumer their listening environment area of the corresponding reference, simple, an area of 20 square meters room, in the true sense of the speaker output power of 60W is sufficient to produce a stronger sense of sound pressure and amount of sense, but it should be noted that, as the amplifier's power to be better, it's best to speakers rated output power of 2 times, such as speaker output 30W, the amplifier's rated the best values greater than 60W, while for 2 channel HIFI system, driver speaker amplifier 100W power base is.

Plastic, metal and wood, in which case material is suitable for you?
2: box body material

In the current market speaker product, speaker of the tank material base in wood or plastic, and some speakers also uses a metal material body, but it is not an exact numeric value indicates what kind of material is better suited for such case.
Plastic box due to light weight and strong plasticity and the cost is low, so in general use and volume of a more compact mini speaker, multimedia active speaker or outdoor broadcast sound box, plastic box of sound because of its material restrictionsinflicts a dry, non-elastic and shiny feeling, therefore not be focusing on the quality of consumer purchase. But note that some of Europe's professional speaker manufacturers use this material to produce some sound quality very good speakers, JBL company United States MM series speakers to a high-density plastic materials as a box, but this is a strong design capability and fabrication process of assurance to the success of the product, manufacturers are difficult to produce.
Metal material plasticity strong and has the appearance of texture and loved by loudspeaker manufacturers, but because this type of case for manufacturers of metal processing and design ability also have very strong requirements so difficult also older production, using a metal cabinet speaker sound in high frequency performance on a strong competitive advantage, gloss and permeability are excellent, but because of its bass difficult to control, so rarely used, the KEF KHT series speakers and hardship in Germany with metal cabinet speaker product, pioneer, Panasonic, and other Japanese manufacturers in its complete home theater system also has the use of such material speakers.
Wooden material is currently using the widest range of loudspeaker cabinet making materials, wooden material is divided into 4 types: high-density fibreboard, Particleboard, plywood, medium density Particleboard, MDF and wood material, with solid wood materials as top-level material, but such material is vulnerable to environmental effects of humidity, must be dried before use. Currently the most popular speaker in materials mostly HDF, this material has a high strength, easy processing, for sound performance is relatively good, current market speaker product claims wooden box product basically used by are such materials.

Weight represents quality? why sound?
3: speaker weight

Since the speaker units are essentially driven by a magnet, and some large output power speaker unit at work often resultsin high heat, so some of the manufacturers in the speaker unit materials specifically designed with cooling parts, which in effect increased the weight of the speaker cabinet, and some manufacturers are using this asSelling points, called speaker box weight because of internal materials foot, in fact, the weight of a speaker not only includes the unit parts, also includes the case materials, prescaler and versamat, etc.
Case material can be said to be a speaker in the "hit that". In theory, the same volume of the sound box, plastic box of the lightest weight, metal boxes and wooden box heavier, but in practice, the speaker cabinet material weight depends on its specific use is what kind of plastic, metal or wood, material thickness can also affect the weight, but it is important to note that the type and thickness of material depends on the actual scope of use of sound and power, box structure.
The weight of the active speaker system is the easiest to play tricks "," due to the active sound box internal includes circuit, amplifier module and voltage transformer parts, so the weight of such speakers generally more than passive speakers, and because for speaker circuit, amplifier module or voltage transformer part real mastery of the consumer, so some manufacturers in these parts use weight greater quality general device heavier weight, plus a "weight" that represented the sound quality of purchase "secrets", many consumers are likely to enter the factory's trap.

Cell membrane materials are in fact simple is true

4: unit diaphragm materials
Current market common in/bass unit diaphragm includes paper materials, PVC, Kevlar, bullet-proof fabrics, etc., which the paper material is the most common, but the material is also broken down into carbon-doped Cone, wool composite paper Cone and so on, treble unit materials include silk, silk film, metal diaphragm, and so on, some manufacturers for consumers for unit of some misunderstanding publicity their used cell material how advanced processing technology, and so on, and how superb and consumers are often misled by the manufacturers of publicity, the blind pursuit of unit of material, thus falling into the trap.
General paper/bass unit sounds more real, and manufacturing into a less expensive, and production process requirements is not high, so is widely used in the manufacture of sound, and treble unit due to the high-frequency sound effects by material, so in some high end of the fever speaker, manufacturers often use metal diaphragm treble unit, treble frequency response range as the unit of processing is differentiated, currently some civil level speaker products audio sound even reached 100kHz above.
In fact the sound material and of sound unit level and purpose has a close association between them is a different standard, if the consumer is buying a set of desktop speakers, so plain paper and silk film unit is sufficient to meet the needs of actual use, the use of Kevlar, bullet-proof fabrics and silk cone does not show the number of sound quality. True to make good sound speaker is not that its materials used have a lot of good, but whether manufacturers can use the same materials to produce sound more excellent speakers.
Wide frequency range, expensive interface materials, the sound quality is really there?
5: frequency response range

The previously mentioned a speaker unit diaphragm material, also referred to the frequency response, so here is a small addendum to manufacturers in the frequency response of publicity remind consumers: frequency response range is wider and better!
I believe that many consumers of the product concerned speakers will often see the term frequency response range, frequency response range refers to the speaker for sound frequency response capacity, in General, the lower the frequency, the more somber voice tone, on the other hand the higher the frequency, the higher the sound tone brighter. However, for the human ear can hear the sound frequency, which is the human ear's response is more than this number 20Hz-20kHz voices are basically human ear does not hear, but some manufacturers of pure will speaker frequency response range callout extremely exaggerated, sound frequency response range even to reach more than 10 Hz to 100 kHz, although the human body for sound can also be induced, but meaningful and not big, so the consumers to buy speakers, frequency response range control in the ear hearing range suffice.
However, because of the frequency response range in addition to professional radio measurement mode, and no one convenient measurement method, so the consumers in the identification of very inconvenient, but consumers can choose by audition for their speakers.
6: interface materials

Present audio signal transmission between most still use traditional wire transmission, as everyone knows, the wire is impedance, impedance, to some extent, will make the sound signal attenuation, even distorted, so some manufacturers began to Technics in interface making the loop, as gold the metal's resistance is low, a significant number of speaker manufacturers started to claim their own speaker uses gold-plated materials, gold plating, etc. means processing interface. In fact, "gilt" should be divided into the use of gold-plated materials, plating, gold plating processing, etc., these are totally different concepts, some low or low-priced speaker due to cost constraints simply not possible with gilded materials and manufacturers in the "gold" really just gold plating process, which at first looks Golden reflection interfaces in use for some time after the most appears golden section color fade phenomenon! consumers encountered such publicity, when we must keep a mind.

Concepts, how to avoid misleading propaganda manufacturers
In the face of the speaker manufacturers of such publicity, consumers should do? first, consumers must develop not superstitious people say "considerations", the speaker of the so-called material excellent materials, advanced design cannot be taken with a grain of salt, because now the people of actual living environment, the speaker of the difference in these areas is not sufficient to become the biggest factor of sound; Secondly, consumers when buying speakers must be on some physical properties of sound, but needs to know things are not necessarily very deep, as long as you know some common-sense, such as the human ear to sound response range, sound transmission characteristics and so on, but the most important point is that, in conjunction with our own actual listening environment andListen to the sound preferences, bring your own favorite or understanding of music CDs, movies, DVD, etc, go a few businessmen, in different brands hear more, combined with their spending power, you can buy a really fit their speaker, after all, the right is the best.