【 Weak current College 】 professional speaker selection and use of note issue top---Power By 【 China power house network 】

Professional speaker is the mouthpiece of the entire sound system, the speaker of the correct choice is vital. Buy speakers, two points must be clear: first, the speaker selection must be a compromise between price and performance, or quality level and cost considerations. Single price of professional speakers can be a few hundred dollars to a few thousands of dollars from the imported high-end speakers $ tens and, these high-end loudspeaker performance course than most popular product superiority, you cannot get both for simple comparison; the second is to consider the form and purpose, that is, according to the different uses to choose the different speakers.

Speaker selection

1. Select the right performance indicators

First of all consult the speaker manual for technical parameters, such as a valid frequency range, impedance, sensitivity, power and directivity, distortion, etc. In the inspection specification should be aware that effective frequency response range at the international IEC standard, there are strict rules, but some manufacturers only mark the frequency response that does not provide a frequency response curve changes do not indicate the frequency response range is based on any standard measured, so this provides a frequency response parameters. For example, a pair of speakers with frequency response range 30Hz ~ 20kHz, low frequency in the following you clearly 70Hz attenuate, the attenuation at 30Hz may have, and high-frequency has 20dB can smooth stretch to 14kHz. In contrast, another on speaker frequency range marked 40Hz ~ 16kHz Shi-3dB, although it looks back on speaker frequency response range without previous on width, but in fact after a pair of speakers than previous on good, because it's frequency response curve indicate only Shi 3dB variations within, and therefore even more, in addition to the rated power of targets should also be noted that States and even the factory calibration of the power value is often inconsistent on, some indication of short-term maximum noise power, peak withstand power, music power, instantaneous power, and therefore value suffered more often than not rated power many times. The national measurement methods and standards are often wide not a yan, for example, Japan's JIS Standards often than some of the international IEC standard width. Therefore, it is necessary to understand when you buy what standard tests indicated is rated power or peak power toleration, speaker of reactive power

Rate to consider listening to the size of the Auditorium and a power reserve. In the same conditions as other factors, often choose to power large speakers, because such products have the power margin, when in high-power playback not tend to cause distortion. Speaker impedance matching with the amplifier is too large, too small is good, especially not too small, prevent damage to the device. Speaker sensitivity also should not be too large or too small; optional 100dB/W/m or so of the sound pressure level or higher is more appropriate, speaker frequency response key selected its limits, because high generally can be fulfilled, and the bass up difficult, would have a lower standard 40Hz following.

2. sound sensitivity and power relationships

Decide speaker out sound pressure level there are three important factors: speaker, speakers of the efficiency of power and the amplifier output power. We all know, the higher the efficiency of the speakers, amplifier and push up the more effort, open-air concert scene all PA speaker is efficient speaker, their volume is staggering. In 800m3 space, speaker sound pressure level at least 110dB. If the speaker's sensitivity to 95dB/W/lm, amplifier must also have an output power of 2000W to enable speaker introduced so much sound pressure level. Similarly, if a speaker for a sensitivity 105dB/Wilm, amplifier with power 200W. Compared with the former, the minimum output power amplifier and speaker's bear power need only one-tenth of the former.

3. determine the good investment ratio

As a speaker in audio system is important position, its investment ratio should be greatest. If his phonograph, speaker sound system of investment accounted for 30% of investment ~ 50% is appropriate to ensure that the playback quality.

4. in accordance with the purpose to determine the favorite speaker

There are many kinds of sound, the sound characteristics of timbre.

In General, Europe and the speaker's tone and sound better, Japan speakers compared to comparable. Specifically, the United Kingdom speaker features a captivating. E.g. timbre B & W speakers; a beautiful simplicity, a simple sound good at performance of the human voice; cool brand speakers to beautiful, relaxed sounds to please people. Famous Rogers companies selling world LS3/5A za to "small but nice" to win. The speaker sound is no substitute for the other speakers. United States speakers stressed that the sound of that Giga transient sense of strong, aggressive: JBL, BOSS, and other speakers. Germany speaker notes sound and music of compatibility, MBL speakers at this point is extremely pronounced. Japan speakers to lowest please users, look more stylish, in recent years to improve the sound quality also made a lot of effort. Some homemade loudspeaker brand products of quality but also on the rise, such as the southern right whale, feile, and other manufacturers of speakers are at bargain prices.

From the above characteristics, the formation of a professional sound system should choose dynamic strong speakers such as JBL. And for pure music, you should choose the sound quality of speakers, such as B & W, MBL and other famous speakers.

5. carefully check appearance

Speakers should look elegant and dignified, should not be too loud. After the selected model, carefully check the appearance has scratches or cracks, etc, also check wiring socket are secure, there is no protective NET cover loose, etc.

6. listen carefully

On the selection of speakers, listen carefully. It is better to prepare and mix of amplifier driving audition to obtain first-hand information. Listen, you should play your own familiar music album, a little more variety available, such as orchestral, vocal music, electronic music, watch their on the types of music playback.

Speakers use

1. use points

(1) reasonable placed two main speakers of a substantial distance to pull to get better sound effect. Speaker base firmly, not because the speaker reproducing and vibration. Speaker working environment to protect against high temperatures and dry, ventilated place. Speaker of the above items cannot be placed to prevent damage due to its resonance and sound quality. Speaker is a strong magnetic field device, it is necessary to pay attention away from the television, watch, tape, etc.

(2) lines to short speakers and amplifier wiring should be short and thick, now there is dedicated to connecting home speaker system with no oxygen pure copper, on improving the sound quality is indeed helpful, according to the investment situation to select.

(3) loudness to appropriate speaker can bear's power is limited, do not let their work at full load, generally greater than the minimum recommended power. If you long to let the speaker working in extreme power, their life will be reduced, serious damage to speakers when also.

(4) clean maintenance clean sound that you want to use a soft damp cloth, not requiring any detergents. Loudspeaker cover easy dirt, cleaning wool brush available.

2. subwoofer crossover point adjustment

Professional audio system with subwoofer to burden the entire system of the bass, the subwoofer's position cannot be listener aware, otherwise the subwoofer will destroy the balance of the sound pressure (such as the subwoofer on the left, you will feel the front left channel sound larger). You can make a simple test, turn off the volume of all speakers, just open the subwoofer; if there is no dedicated test sources, you can play the subwoofer rich record fragment, to focus, you can close your eyes and listen carefully to the subwoofer's sound, if you can rely on the location of the hearing of it, that means that your subwoofer crossover point down too high.

If you are using the standard THX speaker system, direct transfer to 80Hz on it, this is the THX standards specifications. If other "%

Set "professional speaker, the question is not large, set near the 80Hz. In the left, middle, and right main speaker low frequency extension ability is good, crossover point should moderate downward again. In any event, the crossover point "is best not to" set in the above, if the main 80Hz speakers are "limited" bass sound, and the crossover point must be set in the 100Hz above subwoofer's location you should move to the front of the Central Office, close to the center channel speaker.