Weak current College】 【five points help you to purchase high-quality speaker.

The rapid development of multimedia technologies, from the previous PCSPEAKER to today's multi-channel digital sound, feel the sound changes when we should have an understanding of related technologies. This article has some technical speakers do a more detailed introduction, I hope everybody is using and purchasing process can be aware of in order to better enjoy the wonderful sound.

What is digital speaker

Sound card digital modeling transformations work is accomplished by CODEC chip, but since the computer chassis memory in electromagnetic waves, which will make digital/analog, analog/digital conversion are serious interference, so many professional audio recording card widely used methods of the CODEC external, digital/analog conversion parts and various external ports individually made an external box, used to improve the sound quality. But this kind of design will greatly improve the cost, so some speaker manufacturers to come up with the digital/analog conversion work on the transfer from the sound card to the speaker of the programme, i.e. digital multimedia speakers. Digital multimedia speaker's basic principle is that the sound signal does not pass through audio CODEC chip for conversion processing, direct to PCM format with a sound card on SPDIFOUT port to pure digital transfer to digital sound box, and then through the speaker built-in digital/analog converter for resolution, then amplified output, thus reducing disturbance, improved signal to noise ratio.

USB speakers and disadvantages

What are the advantages of USB speakers? first, because the USB speaker system is directly from the USB port of the digital signal to the speakers inside, so it can effectively improve the sound signal to noise ratio; and second, because the ordinary speakers the received signal is transmitted by the sound card to analog signal, therefore, vulnerable to interference, and the USB speakers can make the audio output of analog signals from from electromagnetic interference in the chassis, allowing sound more pure clear; third, the USB audio device can also be carried out by the CPU, thus the data processing using its bandwidth advantage of multiple-channel surround sound system for audio playback (but only with USB2.0 specification).

Then, that the shortcomings of USB speakers. First, because many older motherboard does not have a USB port, causing many users will not be able to use USB speakers; second, the USB speaker system cannot support DOS game, can only support DirectSound3D voice sound; third, EAX, A3D, that require hardware chip to handle voice sound synthesis, USB speakers can no longer support this for gaming fans undoubtedly great regret; fourth, the USB speakers cannot implement hardware wavetable, so users cannot use it to listen to the MIDI; fifth, when the system has more than one task and intensive data bus, USB speaker system is not functioning properly.

Woofer speaker identification

Woofer speaker direct determines the sound frequency response and bass. From the speaker's cone design point of view, the current market mainly "dialysis cone" and "packing tape pots," "bullet-proof material woven basin", "wool woven Bowl" and "CD film" and other materials. "Dialysis cone" advantage is low cost, the disadvantage is that power too large bass seemed dull and poor durability; "packing tape basin" also has the advantage of low price, durability, a little better, also not suitable for high power use; these two categories of product positioning in General enthusiasts can also, but definitely not very professional. "Bullet-proof fabric fiber woven Bowl" has the advantage that the bass is powerful, rock music, percussion performance quite prominent, suitable for high power amplifier using the main speakers, the disadvantage is that the complex manufacturing process, the price of natural not cheap; "wool woven Bowl" advantage on light music, soft music effect is ideal for positioning in the bass range, the disadvantage is the lack of strong bass performance, and are also less; "CD film" is the market for a new product, as compared to the excellent bass speaker materials, it is obvious to all aspects of performance, just as there has not been accepted by many manufacturers, so that the speaker and the speaker to do.

Case material and quality of the speakers

The current speaker of the materials used are plastic boxes and wooden box. Material thickness and quality of speaker costs have a direct relationship, also affect the performance of the sound. Speaker enclosure for material density, the larger the sounds box generated by the vibrations, especially with high-power amplifier powered speakers, and plate thickness to a certain extent, is the powerful Super bass, therefore, plastic speaker bass effect is not afraid to flattered. Clearly, the low end of the audio product must be molded case. But it sure is a mid-range speaker made of wood? answer is no. The grades of speaker both wooden and plastic imitation of wood, just some of the products fully meet the standards of the confused as real ones. Upscale products must be made of wood, but uses the medium density boards, or multilayer sheet that has a different impact on sound quality. Even if the selection board are the same, the same power output, different design structure, different box sizes, the sound quality may still be quite different. However, some speakers are using plastic box, Excel, such as the CREATIVE Soundworks speaker, not only the plastic casing, but the volume is not great, first impression there is nothing special, but after a trial comparison before feeling indeed through, whether it be voice or sound quality have been professional, bass also has a strong shock force, of course, price is not cheap.

Selection of speakers that what

First, pay attention to the speaker out of timbre is uniform, as multimedia music sound source mainly to games and General music-oriented, so one treble the proportion of larger proportion smaller bass. Second, it is necessary to pay attention to the orientation of the sound field. Speaker positioning capability of direct relationship to the users play games, watch DVD movies on-the-spot effect. Third, it should be noted speaker frequency movement-Zoom limit, that is, when the user moves the speaker's volume up and exceed a certain limit, the speaker is also longer remain throughout its range even clear sound source signal amplification. Fourth, we should pay special attention to the speaker box for resonance. General Cabinet thinner or plastic casing speaker in the low frequency band 200Hz following large volume output, resonance phenomena can occur. A Cabinet resonance will seriously affect the output of the sound, so users in selecting speakers should try to choose wooden shell's speakers. Fifth, it is necessary to pay attention to whether with Magnetics chassis. Because the monitor is sensitive to the magnetic field around, if the speaker is the Assembly of magnetic field so that the image on the screen, or even result in the life of the monitor, so the selection is to be noted. Sixth, it is necessary to pay attention to speaker box closed. As speaker of the airtight as possible, the better the output sound quality. Airtight check is very simple, you can put your hand on a speaker's inverted phase hole, if you feel there is an obvious air rushed out or inhaling phenomenon, speaker of the airtight performance is good.

Having said that, with regard to the speaker's topic is far from finished, limited to space, pick up important talk with you. For sound this thing has always been a matter of opinion, we just want to be able to convey a concept, that is, sound is an important part of the computer, be sure not to underestimate it.