ArticleManager[PConline Audio Laboratory]
Enthusiasts always the most detail-oriented group of people in any field are true, but too much emphasis is easily possessed by the devil, HIFI especially in the field. HIFI circle is called the circle of metaphysics in recent years, the main reason is too subjective, the lack of objective measurement. So we consider the test for some of the long-standing stereotyping. The eyes of the fans look at some “common sense” – Fact Or parrot. This time, we want to cut is the topic of the speaker in the field of –
Shock speaker.
Speakers need to shock it?
Whether playing speakers need to shock? The answer is yes (do not ask me whether science wire suspension). There are two reasons: First, the speaker cabinet itself will vibrate, due to the current speaker sound vibrations in the air around the unit itself will produce sound waves, according to Newton’s third law, this time the speaker box itself theoretically would do the opposite direction of vibration . Meanwhile, the vibration itself can be transmitted to the speaker support surface of the speaker – e.g. your desk. So if the quality of your desk more general, I believe that many people will have this experience – once the sound was bigger, the table itself will resonate, and even discordant voices, give chestnut: If your desk drawer At the same time the weight off than light, sound open the drawer open or close the drawer you will find not the same sound at the same time, because when you close the drawer, the entire table and is equivalent to a resonance chamber, which is why the sound of the stent often must be filling yarn.
How shock?
Generally, there will be speakers at the bottom of the basic mat, but only as a basic anti-slip, can not effectively isolate the vibration of the box, so we need a more effective way shock absorbers. And at this point, enthusiasts and professional audio field to the two different ways. The most common way to shock fans no doubt that the spikes, made mostly of wood or metal, the other is the choice of filling yarns wooden speaker stand. In the professional field, mostly in the mix chamber will use a tripod, supplemented by high-density foam pad two ways speaker for shock absorbers, while in the last year also became popular from suspension shock absorber frame this kind of thing (Tanner have all the latest monitors comes with this bracket).
So how are these types of effects? We got several common products available in the market, one by one test. Because of this evaluation against a limited budget like individual enthusiasts, so here we use metal spikes, hundred dollars bare metal stent, suspension shock absorbers rack, as well as medium density foam pad four kinds of shock absorbers way, are in a about 20 square pink noise playback test space (volume of 85dB, the limit close to the normal listening to music) and recorded with a measuring microphone, speakers to test monitors M-Audio BX5 5 inch unit Carbon (price: 1799 yuan one pair). Next, we first take a brief introduction of this suspension of several products, you do not want to see can also skip to the last page to see the conclusion.
Metal spikes
Perhaps this kind of thing spikes speaker wire is fitting Apart from being the most talked about, and the vast amount of spikes can find on Taobao, but nothing more than metal or wood, there are a number of wonderful spring-type shock absorbers feet of nail.
Here we got is a golden metal spikes, support can be rotated to adjust the height and base of formula with a metal disk, Taobao price of about 20 yuan / month.
Metal bracket
Taobao search speaker stands, the result mostly of wood HIFI circle common stand, because they can not adjust the height, so it is necessary according to user demand for customized height, the price to 200 thousand. The bracket for the professional equipment used in monitors are very few, most well-known foreign brands Ultimate Support is the latest one year before the introduction of the domestic market, but this time we have chosen is a relatively thin metal stents, but it proved to become a good negative example.
This bracket height of about one hundred yuan is not adjustable (photography tripod played all know, stand height adjustable tend to be more likely to cause instability), although the bottom of the triangle support, but always giving the impression is not safe, but with the contact surface of the speaker and no slip condition.
sponge mat
For individual recording mixer, the budget for reasons of space, most monitors are placed on the desktop. This time was born foam pad This product has become a cheap choice for most people.
Taobao inexpensive foam pad, made in China and more than 20 yuan, while expensive as hundreds. This benefit is that you can adjust the sponge pad Yang speaker / tilt angle, the user can easily align their ears tweeter direction, to provide a better sense of listening.
Suspension bracket
Appears suspended scaffold, which is about at the beginning of 2014, named IsoAcoustics entered the public view, if HIFI manufacturers like Bluff, then when you see on the monitor speaker factory NAMM exhibition booths are directly IsoAcoustics stand in Ultimate Speaker shelves rather than a sponge when this move is obviously the best publicity for such suspension home. And later, Tanner’s new monitors have already started with the box comes up.
But I regret not buy IsoAcoustics is currently suspended isolation speakers, currently sold online only a high imitation version. Want to buy IsoAcoustics genuine Tanner can only buy the latest generation of the monitor box.
Summary: Professional metaphysics pk
Although the test environment is not very strict, but in the end we could see through a variety of comparative data, and the difference between the shock effects of different ways of shock is there, but in terms of volatility curves, ups and downs are not expected obviously, this is perhaps one of the reasons because the test speaker only 5-inch woofer reason, the objective conditions of low dive deep enough. Therefore, when using standard foam pad and suspension bracket, sound performance have been relatively close, three-frequency curve suspended scaffolds become more stable, while retaining enough of ultra-low frequency. But we can see that in the direct use of spikes and low-end metal stents, there is a seat projection of “small mountain” spectral curve, while the low-frequency portion of the band will be significantly missing, while the ultra-high frequency attenuation are also some obvious .
Metal stents problem, lies in its lack of effective anti-slip, can not effectively reduce the vibration of the front and rear, while the stent itself is not particularly robust. This is less than one hundred yuan bracket for the sound quality can be said to have no equal, and the problem of metal spikes is the same as is used in a smooth desktop, so the individual spikes in the smooth surface can not be avoided before and after vibration (many spikes to avoid publicity and even declared that vibration up and down) this problem requires the use of spikes base will only improve.
For medium-density foam pad, it can not be said to be very well-shock measures, the low-frequency part of the curve still seemed more messy, its biggest little practical aspects can still adjust the elevation of the speaker.
The conclusion of this test is: a small space for the individual user, the speaker is less than 5-inch woofer does not need too focused shock equipment, to meet the basic shock, unless your desk is too thin or quality there are many drawers, so rich solution is to use a tripod suspended, and no money will be used instead sponge pad. Do not recommend the use of metal, wood spikes and other equipment shock absorbers on the desktop, but easy because of the deterioration of the sound (of course, you like that kind of sound, then on another to say).
But this test there are several unresolved issues:
Speakers will be greater than 5 inches of how to do? HIFI circle commonly used wood-stand performance so what?
These two issues, we will be left to the next test solution.