College】 【weak sound in the tonearm of a fever --- Power By 【China】 weak home network.

Sing arm, was originally all basic components of sound combinations. There is a card-after the roll-up with your opponent, playing popular set of Zhuang people began to give up singing up decision. Enter CD century, sing up subject to phase-out of fate has doomed, a matter of time.

Sing arm of plane geometry principle, even high school students also projected. But the pros and cons of singing tone-arm, just not with geometry math can be inferred. I read an article 『 student corner 』, singing the arm through the rows of data, launch, lending our teeth marks a corner to play HiFi standpoint something to sing about arm. A fear lengthy, tired eyes fen readers. It is best not to read in one breath, also in two segments, three paragraphs is also good.

Sing the words of the source arm

Sing, speak arm for decades, is still a word impurityfrom brief: it to changtou in discs by picking up the original site of the message passed to the front-stage amplifier. In the beginning was the player, this requirement is absolute superficial without causing any consumers skeptical. The more developed science, people will feel completely well sing arm itself functions will never be. Today, sing arm faced eliminated, it is unable to do so itself should do.

Sing arm of English Tonearm, is from the Edison phonograph follows. When Chinese people generally call this with the horn mounted together sound reinforcement, follow rows section for the tone arm. Thanks to Cantonese speaking tone arm is not good, therefore, the 50 's, magazines, on this something commonly known as sing arm. Mono era, the first note to sing the importance of the SME's arm. In the past is evident as early as there is a set of technical theories exist, such as the United States by GE to design the world's first branch points and auxiliary arm (Dynavector inspiration source) products, Grey is oil-impregnated bearing axis arm single point. May these wonderful and making the problem did not sing arm in our minds. But the first branches SME3012 make my siya M3D (is that time of top-level Shure) has completely changed the performance of shock, is still fresh. SME arm to Hong Kong, we are already playing stereo. The new ADC-1 mounted according to instructions on SME3012 with 1 g of singing, and there is a paragraph to a type.

However, the research yet to SME3012 side pressure of confrontation. But the results you want?, ADC-1 to 1.8 g only eliminates muddle-headed (as the ADC to advertise the Impressionistic watercolor) screen. Ideal singing star makes needle boom on line is never wrong. The needle and disc sheath tangent% o degree angle that overlap. Any of the needle and the angle of disc sheath is to track error (Trackingerror). The needle is affected by factors such as physical machine geometry, you work to closely follow the direction of disc sheath on line, produced on error (Tracingerror).

Track error and boundary pressure troubles

Technically, the traditional arc track arm (arm tip, as the Centre for circumference operation) cannot eliminate rail. But in the geometric composition on the circumference of the RADIUS on line, so that the tip goes beyond the core discs (Overhang) and provide the front arm tube bending (or changtou shell inflection point) of devious angle (Offset), Commander of the tip in the whole and discs in contact with any point on the Circle line produces limited rail. Any kind of effective length (from axis-tip line) in 8.5 inch (216mm) or above in singing the arm, you can use the appropriate mix Offset to next Over-hang up to ± 2 ° c-rail track in the arc by mistake, singing the arm is not to bring any follow rows changtou headaches. For years, experts have repeatedly tried to use variable-angle design punctuated with a blade angle on line by the end of the disc dieshou has been affected by the change of mechanical push strategy of O-degree track error sing arm (Warden, BJ and Garard). The trouble is that energy necessary those from discs, and because activities Tan-gent arm part too much, and has produced a new trouble, therefore has not a soft circuitous corner singing arm can survive.

A install the exact row arm along the arc, 『 new 』 adjusting the needle position on the disc so changtou draw with two o-degree track error circle trajectory. The entire 12-inch discs follow rows track maximum track error value of ± 2 ° example for 9-inch arm. Of course, the effective length increase corresponding to improve rail in error, and the tip 『 see 』, friction and reduced. However, increasing the length of the arm tube improve the above specification would have to pay the other costs.

The arc to sing arm, ± 2 ° simply unavoidable. Today, all the better you can cope with this changtou number of errors caused by, but the needle for physical machine geometry and the operation of induced on line distortion (Tracingdistortion) is not within the scope of this article.

Even then, Newton aien carbocisteine Muscovy students, this world cannot have a 『 from head to tail is tangent to the traditional structure of singing arm 』, said that this person will be irresponsible. Sing the devious angle arm, how will the needle and the friction of the CDs are forward (and the centrifugal force of the emission lines belong and dish of the tangent) drag (drag), changes direction into the centripetal side pressure (Sidepressure or bias Bias). Side pressure is one stereo discs is only affected by electroacoustic community in the age concern things that trouble for HiFi track errors in more than 10 times, it is up to now did not neutralize it (or accurately counterbalance it).

Side pressure on the discs sheath core side (left channel) bear needle pressure far exceeded by the side of the week, so that the discs depletion of acceleration, distortion. In a standard roll weight, the left channel from the excessive pressure which they sing to right channel. Left channel dish is certainly wear faster lines, right channel plate pattern due to insufficient was sung to the needle on line at irregular vibrations.

It is a known side pressure and friction, while the needle and dynamic friction disc sheath and practically no two seconds. All active edge pressure design essentially static regulation, therefore, all edge pressure treatments and cannot be effectively offset side pressure that makes singing arm in actionWith edge pressure, immense pressure or reverse side pressure. Very unstable.

Side pressure (i.e. bias) is something everyone can see what the changtou in rotation on smooth disc, you can enjoy the edge pressure to sing the arm to the core. The reverse side pressure increase, and may make the singing arm comes out in the opposite direction. General-edge pressure, is to sing the arm rests on the both sides smooth disc not drift. Some arm easy to do, some will just have to sing the arm in the central part of a smooth disc remain stationary.

Side pressure energy decrease, and the following factors: sang proportion, sing, sing arm-disk speed, PIN-to-plate pattern of contact area, and disk shocks for. streak

Someone talk his way out, said 33 go dish edge pressure greater than 45 go, with smooth experiment at once can prove that the ridiculous. It further stated that the performance of smooth disc does not represent a sheath material characteristics. Really angry, he wants you to believe that there are sharp edges of the 45 go dish down transformation have sharp and smooth 33 disc experiment concludes, on the contrary. Really twisted veins!

His theory is 45 go dish the same loudness of amplitude than the 33 go in more limited, it is impossible for him to understand the views of wishful thinking. Correct Dan promoted the Sing Sing arm after arm and immediately produce edge pressure centripetal force, more trouble edge pressure regulator to deal with the harmful engine. Therefore, traditional arm from power needed, from disk at a sufficient mobile sing arm 『 effective quality 』 (Effectivemass) and overcome the friction force of up to sing arm. Note that the power of mobile to sing arm and move the needle of power can not be mixed up, though both closely related, but two things.

Straight arm on line no centripetal force, disc sheath is to supply dynamic mobile sing arm. And pin point and pivot of distance short focal point will be imposed on the larger energy, is the same as the fulcrum do grams. While the fulcrum architecture and traditional arm back, to the whole arm body for parallel movement to drive core goes on, the required energy is definitely more. Straight arm on line are hoping to adopt quality light arm tube and pretexts ball to overcome the power consumption. In addition some electro-acoustics home study active (active) on a straight line through the line arm. In theory, as long as a set of accurate photosensitive (Optical) servo system, power press disc sheath of instant distance and precise movement of singing arm, can solve the problem on line. However, outstanding photosensitive servo system does not resolve to sing arm vertical activities. Back to to cushion the concept of physical for 『 floating 』 straight arm, there appears to be a viable way.

Zero-gravity and infinite mass weight

This topic up to the quality and attractiveness of friction and gravity. Once upon a time, SME, sing arm of friction and quality to be equal to zero. This is the old fever most of singing arm theory. Zero-gravity and zero friction effects did not follow rows needle disturbing force of thousands. This is never dream, SME can do very low-weight and extremely low friction of traditional arm. In the 1950s, enthusiasts Duet arm harmonic oscillations problems simply ignorant, contrary to sing on changtou and arm of matching issues. (The time if you on rap-up will change the tone, you must be crazy, no doubt). Thus, the physical characteristics of the boom willgradually be exposed by the experts. ADC, Grado, count dooku to further explanation. Until we first saw a person out of Japan 『 giant 』 SME, brand name is NEAT, is amazing in this world could someone make tons of singing arm.

SME's O-theoretical, finally a revolutionary internally. SMEV-is a fully according to 『 new 』 discovery and creation of singing arm, go TheArm route. NEAT is Japan HiEndHiFi products one of split stone quarries, their hard work and enjoy all the seeds to withstand the afford full transit thorn in Japan HiEnd history disappear.

NEAT is single-heavyweight production bearing axis, and later SAEC have something I don't know, but NEATT Chengshi took a boom in the early 1960s to Hong Kong, the better the sound (AR, Marantz, Grado, Magnecord ...) Responsible tour Po Qiao asked me with a total of rice, Japan who tell me an unprecedented sing arm theory: sing arm of frictional force should equal zero, but the quality is equal to the weight should be infinite! only and infinite qualitative heavy coupling, the needle of oscillation can be 100% accurate sensing wheel, only the infinite mass weight and will not cause changtou coupled harmonic tremors!

But NEAT and in the future other arguments of the same products can only do very high quality heavy sing arm. In any case, traditional arm is unable to eliminate harmonic tremors, unable to prevent the occurrence of harmonic oscillations. In fact, the zero-gravity and infinite mass weight is, after all, the word of physics. Singing is a medium weight jib of the machine, load weight, the height of the coupling changtou height of compliant degrees determines the combination of harmonic oscillations weekly rate.

New breakthrough brings disadvantages

When you first come out SME arm, we not only on the side pressure of nothing, even the two head needle, and only limited to 33 78 go needle and PIN number of RADIUS turns. At that time only round tip that 33 go dish has been widelyused in the diamond needle replacement 48 to 58 years Mono phase of precious stones. HiFi electronic knowledge, and knowledge a bit different, the former are often no more detailed discussion of the book to go. Academia is to rely on each year's AES, RIAA, and other international meetings on the exchange of experience. These first-hand information, intermittently through several worldwide wireless publications (HiFi is wire!) Disclosure. Until players generally know, generally, it is too late. Our readers may wish to look up your children in school textbooks, if so see the Phonograms and amplifying a section of the way, guarantees you cited is perfect. Player's knowledge is at hand, HiFi, student textbooks is an electro-acoustic on the medieval history of common sense.

Think in the same year, a lot of common sense, HiFi are from publicity text absorption. This learning has a shortcoming was blind, she only senses. Generally, the promotion of new technologies, commodities the first step is always the old technology of shortcomings set out in detailWhip messing up, Schilling consumers believe their is also used for 『 stale 』 things must be eliminated. The second step is to introduce the new product's breakthrough, smallpox from falling out, after the unprecedented overwhelming, and enable consumers to trust the new product is a necessity, and product quality is perfect.

We read all 『 breakthrough 』 of electroacoustic new products with a perfect, once and for all hope to replace the purchase. However, these words may have made their breakthrough brings many shortcomings!?

In any case, the text of the new technology also should read. For example, that we are on changtou from siya Shure article learn soft degrees (Compliance) of importance, from SME article to learn the benefits of low-quality and weight and axle absoluteness of blades. Trackability is the Word make Shure to, even audio encyclopedia also recorded it, but the audio industry as the best reference book, singing arm technology source information is extremely leather of the poor.

Static and dynamic balance

Sing the factors affecting the tone arm, friction, track errors and quality to three topics were the first find. But people do not understand the two points of friction and track errors easier to control and less important, and quality of the heavy size determines that sing arm matching personality.

Singing of quality heavy arms refers to its effective quality heavy, 『 (EffectiveMass), according to design experts say that sing arm, effective mass weight is singing the whole movement of the arm and mass to subtract them with all kinds of methods for 『 decoupling 』 (Decouple) back to the rest of the mass, that is effective. It is up to now, on the effective quality to the interpretation of the word remains with a grain of salt, or thought it was the engineer of wishful thinking. Is a part of activities to sing arm by changtou Shell to balancing spindle's end, least dozen g weight, and how to 『 decoupling 』 calculation method on the 2g to effective quality 22g? (According to memory, the effective quality heavy Beogram400 is 2g below), we can imagine, when a pair of over 100 g heavy machinery pivot was an external drive, it's effective 『 inertial 』 (1nertia) quality to what computing? General might think that when singing the arm in the obtaining and suck completely balanced State, i.e., o, and then tune 1.5g sing to, sing arm 『 dynamic 』-weight is 1.5g. This view is wrong, because O heavy state, only the needle end 『 static 』 quality to equal 0. 1.5g sing to represent the needle end 『 static 』 weight (sing to the static balance arm) is the only completely 1.5g is equal to the (static) arm in the operation of the always provide 1.5g needle side pressure, sing the arm in the operation, arm body with dish core and disc surface slight fluctuations in the changing a little vertical and horizontal promotion, undermining its own staticbalance. Balance spindles in jitter when the pendulum effect, decreasing the action against gravity, of singing (up shake), increase with gravity action singing weight (shaking down). Left and right side the jitter is increased or decreased, the higher the quality heavy pressure on the arm, the pendulum effect Yue Jin, on the other hand, the higher the degree of flexibility on the head, the more vulnerable the pendulum effect of interference.

Everyone must know static balancing (StaticBalance) is anything, it is a full-on balance spindles to obtain sing about in the stationary jib is tumbling (no operation) is fully balanced arm balance (DynamicBalance) arm is the merge type design, first obtain a static balance, then to spring right-side pressure attached to the needle tip. About theory, balance is not subject to the influence of gravity, so no pendulum effect, but the world is not a pure balance arm, general balance arm in action is still affected by gravity, but to a lesser extent.

Those first to obtain static balance balancing spindle and sing with the spring adjusting the weight of the arm itself 『 dynamic 』 part available may be less, because simply by adjusting the balance of thallium is available subject to availability of singing. This can prove to sing arm, static and dynamic weighing two adjustments to sing the way the different sound characteristics. A case study in United States, this TheArm arm early arrival, agents will find told me that at first I was skeptical about this until the test person repeatedly, finally affirmed the distinction between the two: single sing with balance for immediate adjustment weight (pure static), get more huge dynamic and somewhat lost a little bit of clarity. Liu geek even offers a variety of blending modes to suit a variety of adjustment of light Yuet head.

There are many people who know the fever a bunch of theories that we view track nearly nothing. Even arguments attacking the enthusiasts 『 pot 』sound of ridiculous. You know, 『 pot 』 electronic mechanical physics, theory and technology with it. Also, see the pot immediately with the oscilloscope front and back of the wave of differently in pot. Unfortunately, static and dynamic balance on the same arm provides distinct sound character, oscilloscope is invisible.