[Home Theater Network HDAV.com.cn] Among the various types of audio "difficult to play", "difficult to play" speakers also accounted for a certain proportion.

Interestingly, although many brands and models are difficult to play, it is already a "known to everyone", but there are still many people who know that there are tigers in the mountains and prefer to go to the mountains. Perhaps this is the nature of enthusiasts.

What are the difficult speakers? It can be divided into two categories: one is that the overall output energy of the speaker is low, or the output energy of the low frequency band is low, and the second is that the positioning of the speaker is not ideal, the tone is not satisfactory, and the fidelity is fidelity. Not enough, etc., for this second kind of hard to push, this article will not be discussed.

It is only a matter of appearance that the speaker is difficult to push. If you do some research and research, you will find that there are many reasons for it. Here are some simple explanations:

A, the output sound pressure is not enough. If you use the same amplifier to push such speakers, you will obviously find that the output loudness is much lower than when you push other speakers. The typical representative of this speaker is the prestigious 3/5A speaker, due to 3 The impedance of the /5A speaker is usually between 11-16Ω, which means that the amplifier will output much more power than usual, compared with the 8Ω speaker, plus a very special 3/5A crossover. The box is hard to serve. However, if there is no high requirement for the sound pressure level, then there is no such difficulty in pushing this.

B, the sensitivity factor has a certain relationship with the output sound pressure. At present, many home speakers use a small-diameter woofer. Due to the innate physical characteristics, the bass of the small speaker unit itself is lacking, so there is a sensitivity difference when it is installed in the speaker and the tweeter. If the tweeter is 90 decibels at 5 kHz and the woofer is 85 decibels at 50 Hz, how do you coordinate it after loading it into the case? Although you can use the structure of the case to raise some of the bass, to get a balanced sound, Only the frequency divider is used to reduce the sensitivity of the treble area to a level close to the sensitivity of the bass. This means that the sensitivity of the entire speaker has been dragged to 85 decibels. Although the overall balance of the speaker is normal at this time, the output power requirement of the power amplifier is high when the power amplifier is matched, because a part of the output energy is consumed on the frequency division network.

C, impedance matching, a pair of speakers with a nominal impedance of 8Ω, usually refers to the impedance of working at a certain frequency (such as 1KHz). At other frequencies, the curve of impedance change is fluctuating and will appear. A few to twenty ohms of impedance, when the high impedance is encountered, the output power of the power amplifier itself will be reduced, and at low impedance, the power amplifier will be tested. If the power amplifier has sufficient driving force, the output power will increase. If the driving force is not enough, the output at this frequency will be much lower. However, since the purchaser cannot have a comprehensive understanding of the characteristics of the speaker or the power amplifier, the actual effect is only known after a trial period.

D, characteristic matching, refers to the cooperation of the amplifier and the speaker in many aspects, and also includes some other factors known and unknown. We often find that when some speakers are equipped with amplifiers, there may be brute force amplifiers that do not necessarily push the speakers, but the power grades can be driven like a fish, and a power amplifier that can bring other speakers into a satisfactory tone. When you encounter a hard-to-push speaker, you don't "cooperate". This shows that there are many mutual and unknown factors between the speaker and the amplifier. However, one thing is certain. Try to use the amplifier without large loop feedback to make the speaker and the amplifier not " The influence of cooperation is reduced to a minimum.

E, personality makes it possible, some speakers with high reputation but difficult to push the "famous name", in fact, are speakers with obvious personality, that is, some aspects have advantages, some aspects are not good, but many burn Friends, do not understand, do not understand or even believe this, I always hope that the speaker should have a comprehensive play, especially after buying a high-priced, very famous speaker, I hope that all aspects should have a good performance. . As a result, there is no hard-to-push speaker that has become really difficult to push.

F, the bass problem, whether it is noticed, the speaker that is difficult to push has a characteristic that the volume of the bass is less. In other words, if the volume of a speaker is sufficient and full, I guess there is no difficult topic, because In the middle of the fans, there are many people who like the bass. What is puzzling is that speakers with good bass reduction are not “rare items” and can be found in most speaker manufacturers' products, but many fans like “big-name” speakers, and it doesn’t matter if the bass is too small. The cost is much higher than the price of the speaker to prepare the power amplifier equipment. Perhaps, they will plausibly say that because the other aspects of the box are very good, only the bass is lacking, so it is worthwhile to try to match a high-priced amplifier. The problem is here. If you change your mind and think about it backwardly: Just because there is a lack of bass, will the advantages of other aspects be revealed?

Audio equipment, especially the speaker equipment to be uttered by the terminal, is composed of many parts with its own physical characteristics. This characteristic is not transferred by human will. Lenovo, it is also a sounding instrument. For example, if someone wants to create a "universal violin", it can wipe out the sounds of violin, viola, cello, cello, etc., everyone knows that it is almost impossible. The task of completion, then for the speaker, why not?

The audio equipment market is actually a large integration of a wide variety of equipment with different characteristics. The hard-to-push, big-name equipment only accounts for a small part, and the easy-to-push, big-name equipment is not rare. Sometimes, if you can get rid of the aura of big-name speaker reviews, you may find that hard-to-push equipment is not necessarily the only choice for good sound. More fresh and fun home theater information, please pay attention to home theater network http:// (WeChat: cnhifi), the country's most influential home theater audio player interactive media website.

Note: This article was transferred from China Audio Network. The article is an independent view of the author and does not represent the position of the home theater network.

Corn Sheller

Corn Sheller,Hand Corn Sheller,Corn Sheller Machine,Hand Crank Corn Sheller

Hunan Furui Mechanical and Electrical Equipment Manufacturing Co., Ltd. , https://www.thresher.nl