【 Weak current College 】 buy KTV professional audio what tricks

World almost nothing compared to mere auditory evaluation speakers more subjective. A bit of sound fans meal may become another audio fans of poisons. But for the experienced listener-this refers to those who have spent hundreds of hours in controlled conditions compare several speakers as well as those agreed that there should be a set of guidelines for people-who in methods and conclusions should have some basic points in common.
But that is not to say that we must insist on consistent. If you found the sweetest sound is the ball most powerful bass impact, that would be it! "to purchase favorite things" this straightforward advice, and never wrong, but if you agree with the "accurate" (accuracy) as speaker of the ideal quality, you will see the following knowledge contribute greatly to find an accurate speaker. Here the "accurate" is defined as the inevitable price and size constraints, possible broad frequency range reproduction of original sound recording voice timbre, dynamics and various aspects of the environment, climate, change the details of the less the better. Of course, this definition is a circuitous and indirect, because if you do not play with a speaker, and how you can know it the original sound is what you and I do not know the world famous painting "Mona Lisa" and are there?, somewhat like the old 16th century ladies live, but we believe that more than Ang? da Vinci the skillful painter, finds his painting is accurate, and artistic. Similarly, if we choose a card with the artistry of the record, we should assume that it replayed together can be almost as real as the original performance. Although recording device (such as a microphone) inherent quality sound with speakers will have differences, but several excellent recording between substantive quality differences should be far more than a fine and a mediocre speakers differences are much smaller.
Listen to duty
Nothing can replace the experience, so you should take every opportunity to listen and compare the speakers. Remember listening environment is vital, listening should always use good amplifier or receiver, and excellent audio source component to reduce the number of variable factors. But you can be sure that even if it is similar to the trumpet, listen to voice differences when found, far more than finding the differential amplifier and CD player.
If you use A/B comparison test device, it has a direct connection to two pair or two sets of speaker switch. Be careful when testing to compare the work achieved equilibrium, that is, two sets of test speaker volume remains within the 0.5 decibel difference (this can only be used for an accurate measurement of sound pressure table). This is a psychological fact: If a speaker's sensitivity is better than another, so the sound is a little loud, people would think of the speakers sound "good".
Another point you must know is: speaker position on the voices of the General Assembly was a surprise to people unexpected, so listen to what is necessary to compare a pair or a set of speakers swap position even when placed side by side or to Exchange, you will be able to listen to a position on the voices. But you should not rely solely on A/B comparison tests, but also to step over to (or per-group) listening to understand their sound characteristics.
Obviously listening material is very important. To select some demos available recordings, select the point is not in accordance with its music, which is based on its sound recording accurate, at the same time be able to display a particular aspect of sound quality. Select the record used for assessing the speakers with a variety of ways, I often recurrent use paragraphs familiar music so that I can pinpoint the sound of a critical test. (See the following appendix measuring sound recordings). This method has the advantage that you will soon be on the music of cooked to the extent that you do not use it as music to listen to, but rather focus on how accurate music reproduction.
Listen to the list of items
Whether you want to listen to the speaker of what sound characteristics? different experts may have a different answer, I offer the following points:
1. the timbre of uniform Unity (timbaluniformity)-I think this is first and foremost, it means that the broad frequency range from bass to treble tone uniform unity. In fact, the tone consistent is difficult to be judged as a whole, so I put it into four small areas:
A. people sound domain mellow (vocal-rangesmoothness)-this section is designed to listen to the voice (including singing and speaking) for medium-frequency part of the speaker tone of pollution-this is part of the general shortcomings of the speakers. The most common manifestations of "error" is the sound for different people are the same color. It represents a megaphone or nasal voice, or one through the closure of the Palm. I think this is the maximum can be heard. It distorts sound radically different vocalists such as JanisJoplin and GordoInghtfoot singing.
B. low frequency/low-frequency disturbances in-it is easier to recognize. The usual signs is sound buzz or shallow (an increase or decrease the tendency of certain tone), or a hollow sound (lower male performance too overbearing or weak).
C. lower the treble, the flexible nature-I usually use collective String Orchestra to test this. I listen to the voices of stringed instrument is the sharp is not normal or dry (no angry voices) or too sweet. This is a listener to the most stringent requirements, unless you have something to listen to the band's musical group live performances. Due to the halls of acoustic condition and the band's playing style is different, even the best string group, also sometimes appear rough and hard to stretch stretched voice. To listen often have rolling shrill voice or metal sound, while also takes note of the sound is too plump up sounds unnatural. To hear a few recordings, see this kind of bad quality whether the record itself.
D. top treble (tip-toptreble)--in most music almost nothing sounds more than 13 kHz, if we really heard the sound of this frequency, that's just the "electro-optic Flash" instead of music. Listen to jazz or swingRoll in the Percussion Cymbals is to master the easy way to sound. Pop music to jazz and rock high-hatrides together, recording nature such record is an excellent test materials, it has clean, high-pitched repeated moment. You want to focus on listening to every moment of this moment the treble to see whether dark (lack of highest octaves), too sharp (too many most octave), and Fuzzy (something not clear, like Lisp-metallic sound, physical cymbal will not have this kind of sound).
2. audio positioning-here I am referring to the sense of space, the sound field, depth, and is used to describe the speakers how to create an authentic acoustic space environment of many terms. In General, most video is changing the speaker quality and certainly the most difficult to assess, it is because even the best sound regeneration is not quite like the original sound.
I first heard of audiovisual stability. When the level of musical frequency changes, a singer or a musical instrument soloist position whether wavered, move from side to side or front to back, the entire sound field is in both speakers between fully under way or tightening in the middle part of the human voice and musical instrument sound?, front to back depth is whether residual natural? excessive or insufficient sound?
All of these issues is rough, not an "absolute" answers. Each speaker is somehow distorted sound "real", so these changes are purely personal taste. Different types of speakers have essentially the locating of different audio and video features. For example, the double-pole (dipole) speakers like most of the electrostatic or magnetic speaker plane, typically can have a greater sense of depth and space, but the accuracy of positioning in the audiovisual and musical instrument sound field location but on stability. Use the Horn or some more promotion units arranged in this class to control the direction of the design of the speakers nature opposite. Most common dual channel or the nature of the three-channel speakers are usually between.
3. dynamic range-virtually all of the speakers are to some extent, the dynamic range compression. In other words, if you exceed the limit of a volume, the speaker will no longer be able to produce the entire frequency range of equal clean audio output.
Dynamic range of manifestations, there is clear: this is the driving unit (usually the intermediate frequency or low frequency unit) in the event of a powerful transient sounds generated buzz, Brazilian beat sound or thudding sound. Another more precise, it is non-linear frequency response. Speakers in certain frequency ranges (usually deep bass) does not maintain a constant output, the result is a large volume is too bright (MF/HF part is usually more than low frequency produces a clean, high level output) or strong, broad-band transient sound missing weight and impact.
In casual listening situations clearly difficult to judge these dynamic constraints. You can determine the recognized bass unit "distortion" at the bottom (bottoming) instead of amplifier clipping distortion (clipping)? are you able to listen to the speaker is distorted and not furniture, flooring, window of vibration? if you can hear the sound too bright is due to the limitations of the speakers instead of your own ears in very high volume natural "distortion"? unless you in a familiar environment for listening, you will not find the problem.
4. low frequency extension-truly the entire replay audio band till 20-25 Hertz speakers are extremely rare, and very few speakers cannot produce more than 80 herb stronger output. When we refer to low-frequency extension, refers to the ten octave music of minimum two octave. Traditional musical instruments rarely this vibration (but percussion instruments, electronic synthesizer, and recording sound track of rumbling bass exception).
With 40 Hector left and right audio recordings is quite rare, classical music (such as the coplon as ordinary people of drum number ") in the bass and drums and pop music synthesis of sound in the ultra is the best test materials. Unfortunately unless the speakers are moved to their own homes, otherwise extremely difficult to judge its deep low-frequency response, because the speaker location and room acoustics environment on bass impact than any other loudspeaker performance impact.
According to the above points, I tend to use one or two very familiar, has a solid and powerful percussion records to assess the speakers, I used a light heart to hear that kind of free deep bass and realism of the coup. However, to wait for opportunities in your own room to repeat this test, I think, in its sole discretion, to the time I didn't have enough confidence in the evaluation of your favorite speakers "good" and "poor", "medium" or "totally unbelievable".
Test record description
Here are some I often use to listen to the speaker of the CD sample, you will notice that most of the album were released more than five years. But if they can top available, there is no reason to change. You take it as a starting point and then gradually add you own test materials.
AMANDAMCBROOM:amanda(SheffieldLab10066)
I was in the "amanda" and "TheRose" two songs in the hear of the bass and mellow in the bass. This is an excellent natural live recordings albums, with a very neutral voice, the nature of audiovisual positioning, and warm bass.
THEHOLMESBROTHERS:Jubilation(Realworld92127)
I listen to this album in General is to listen to "IwantJesustowalkwithme" this song in a male voice pronunciation of enunciation, open top octaves and a sense of stability of audiovisual positioning. The whole CD naturally, closely reproduce HolmesBrothers excellent people sound color-used to assess if the voice quality is better, another song "I ' vehadmychance" performance an image of the left-right sound field, depth not deep but can be resolved. It used to do a comparison of audiovisual positioningVery appropriate.
JOHNEARGLE:Engineer’schoice(Delos3512)
This album of every section of the sound track to test a project are ideal. Includes all kinds Auditorium acoustic conditions and acoustic field. I used the following:
1. chosta us singular pieces for the eighth Symphony, used as a test of audiovisual and sound field depth and the lower the treble of string sound. The music complex and in-depth, but have an exact and broad stereo audio, broad band and rapidly transform the tone, it creates a recording from speakers the depth and breadth of capability provides a rigorous testing.
The PentecostMassfororgan 2.Messien. If you're tired of listening to Bach prelude and Fugue in d minor, this music is the best replacement products, it is a low-frequency extension of truly excellent organ recordings.
THOMROTELLA:WithoutWords(Dmp476)
This is a Rook/Fusion small rock band's very clean Studio production records. Its characteristics are dynamic, a large number of powerful electronic bass, as well as the reasonable nature of the highest octave. I often use first say track ("SinceImetyou") gradually increased loudness to test dynamic retention capacity. Although for some speakers that require large amounts of power to prevent when pedal drum, bass drum, ringing chord are sounded together, amplifier distortion resulting clipping. It is also used to test the dynamic restricted flag, as well as the obvious mechanical constraints, and so on.
PHILWOODS:Here’stomylady(cheskyJD3)
I used this excellent Jazz Quartet records to test the stability of audiovisual positioning, treble and bass sleek. It features a very natural small room audio and prominent drum sound. Drum player Kenny Washington likes timbre? dark cymbals, so my main test depth instead of testing the highest degrees of those "Flash". I use most of the second track "say that" its JohnnyHodges was an excellent test fragments.
BEETHOVEN: String Quartet in early (AlbanBerg Quartet EMI47127/8)
I used these recordings to test the lower the treble/string of sleek, audio precision and depth. This album sounds very warm and filled with the smell of the "wood" (woody). If the string section of the sound too rough or sharp, you must have some unusual thing happened. Cello show Central bass voices of fullness. Each sound track can be used to test, but for this section tracks not addicted to music but forget yourself.
How to test five (or six) speakers
Test the surround sound system speaker, these four listening areas-tone even consistent, audio-visual positioning, dynamic range and low-frequency extension-remain unchanged. But for movies, dynamic range and low-frequency extension could be strengthened.
The center speaker is the most important. On film, the center channel broadcasting all dialogues, most of the music and sound effects. Select speaker maximum points is called and left main-channel speakers sound as possible. If you want to sound field connection seamless, smooth transitions, required several speakers match exactly. The most straightforward solution is to buy and left main speakers in the same factory or in the same model or original design match the product.
The following is a useful test method, it requires distributors to assist. To use only the front three speakers to listen to a snippet to speech oriented Mono programmes (TV show cancellation stereo can). Use the A/V receiver or processor level matching device the speaker output and left main speakers produce the "illusion" (Phantom) center channel (select switch on "no speaker" location) to balance. Then disconnect the surround sound speakers or select Dolby 3 surround sound format (use only the front speakers) and then sit in the static point (deadcenter), using the remote control continue to press the "a" or "no" to the speaker switch until you hear that one speaker and tone color closest to the left and right speakers.
In-store environment audition subwoofer is a waste of time. Because the room acoustic conditions and placement on bass performance too much. I believe you would go to rely on the vendor's recommended manufacturer's instructions, and magazine articles (like this one and the like). If you have a consent you get a subwoofer home audition, the effect is not good to return to the vendor, you'll buy him, this is the best advice.
In the shop in audition surround speakers had a similar situation. This thing seems interesting but not worth it. To surround, treble "space" and deep bass extension is generally not so important. Certainly, the most experienced listening to movies and some music like scattering double pole surround speakers and do not like direct radiation-speakers. Purchase the surround speakers and a subwoofer like best is you can audition and return home businesses to buy.