Google has various suggestions for keyword & preferred texts related to the ad you are placing. However, he found an article titled “current and power. Amplifiers“This is a top-level read on the subject of audio, concerned with the advanced aspects, with a well-deserved emphasis on a simple fact about electricity:
He and Newton didn’t know him (he lived before Ohm and Amber), so he didn’t stick to electrocution. I suggest not to use words whose meaning we do not know, because they come from stupidity.
This text is very likely to give a brighter picture of the topic of sound and electricity than the video suggested in the comments under the March entry. You can also go to the salon audio network guide, where there is a more simple text titled “Why is an appropriate power source in an audio system important?And there are, among other things:
In the case of power amplifiers, especially those with very high output power, the need for any power auxiliary devices must be carefully analyzed. Using these makes sense when network disruptions can be very annoying. Most of the well-designed power supplies found in power amplifiers can “handle” external noise.
The only question is how the content of this advanced text will be interpreted by the reader. The text is clear to people with reliable knowledge, but it has been made available online to everyone. It was also created with the aim of the general lack of reliable knowledge on these issues, so it should be assumed that the reference points will also be appropriate. What someone interprets is absolutely unpredictable. It may come as a surprise, because there are many strange theories and it can be a point of reference for the reader. It is not surprising that various comments appear under the texts available on the Internet. It is not surprising to say that there has been nothing new in the topic of sound since the eighties, while at the same time, in some illogical coexistence of opportunism, its absolute denial is praised.
Someone praised the loudspeaker mentioned by the manufacturer “Newly developed by Technics Active Noise Reduction technology which precisely isolates and eliminates power output stage distortion caused by anti-speaker electromotive force and voltage drop.“Those who know this topic know that work in this field has been carried out since the 1980s. Technicians have introduced a lot of new solutions, marketers have more descriptions about it, and it is easy to get lost in the maze.
Innovative novelties with the KEF label may be more difficult for readers. The British tradition of loudspeaker offerings is characterized by a special appetite for electricity, which led to the development of loudspeakers. Now KEF’s flagship offering includes an active solution without energy-consuming passive crossover. This is a very good move. Active computer speakers have been in widespread use for years, but even here on the program’s website, a commentator has linked this topic more to a modern TV solution. This sudden association is probably due to a different context in the published content, when the example is used with the RTV Marketplace view in this case.
It can also be difficult to read the common thread of what Technics and KEF have to offer for the average interested, these are just two different ways to tackle the same problem. Technics has new solutions to Britain’s loudspeaker appetite, and KEF is eliminating twice its traditional offering. Many indicate that the reviews available on the Internet on this topic are not enough to understand it, because the exhaustive text tires many people. Knowing the references may also be of great importance here, more specifically, the lack of motivation to supplement them, which many commentators mean later, because they only want to be appreciated and therefore gain nothing from them.
The latest KEF display in the top view has a lot of features that can be very useful with RTV equipment, but it generates a high price for the product. This makes it easy to overlook the innovative feature of active crossover. It makes it easier for the amplifier to power the speakers, and even with less watts, it can more faithfully reproduce music. Technologies in their marketing materials draw attention to: “Neutralizing the electromotive force of the amplifier“This is a particularly complex problem when there is a passive junction between the amplifier and the amplifier, and the more advanced this is, the greater the challenge. One proven solution for conventional amplifiers is to provide enough current to faithfully generate the transmitted signal using music, which for It is just A very intensely variable voltage is supposed to control the movement of the diaphragm in the photovoltaic transducer.
The frequency response of 20Hz-20kHz means between 20,000 and 20,000 movements. times per second. In transmission graphs, each frequency is generated individually in the measurement with only one voltage level. This is a “time graph” from a measurement in which the individual frequencies are always given the same voltage, so the line must be straight. There is no such comfort with music, because it is a “conglomerate” of many frequencies and voltages transmitted simultaneously. In a very simplified way, it can be hinted that music contains many signals from various instruments, and each of them is also a “collection” of its own. Disruptions in the power supply of the amplifier are “integrated” with the music, which also applies to interference from the power grid, as stated in the salon audio manual, but in efficient operating equipment they are minimized.
The stability of the semiconductor operation of the amplifier, and therefore the power supply in it, remains a challenge. Semiconductors work more consistently in class A, which entails high costs for the manufacturer, because you need to provide an efficient power supply and, in the case of transistors, also effective cooling. The more current transistors are received, the more expensive their power and cooling must be, and the cost increases logarithmically. With tubes, the cost increases to a lesser extent, so high-quality amplifiers have been a little cheaper to produce for a long time. There have been attempts to reduce the costs of transistors in various ways, including Mastosita In the 80s, I provided solutions under the brands JVC and Technics using the extension Class A. On this topic, the hi-fi dictionary categorically states the following:
In addition, manufacturers of audio devices used different terms for the company with the word category in the name. For example, Class AA, Class Super A, or New Class A. These terms have practically no more informational value, and can sometimes be misleading.
RMS has posted a very neat explanation on this topic:
Grade AA. It is a way to build a “two in one” amplifier, i.e. a high-quality low-power amplifier that operates in Class A, and another amplifier that operates in Class B more powerfully. Both amplifiers are connected to a special bridge so that the less powerful one works with small signals, and with a larger signal, the more powerful one runs smoothly. These amplifiers have low nonlinear distortions and very small phase shifts. These amplifiers are promoted by, among other things, technologies. It’s more of a marketing category, and has little to do with the traditional division of loudspeakers into categories.
What Technics offers now is a continuation of the many advanced solutions that are powered, but offered to play home music is somewhat outdated. There is even greater potential in active speakers, which in the RTV market is still closely associated with the presentation offered to gamers and the reproduction of impressive sound effects, and not for experienced music listeners.
Active speakers are nothing new. They were successfully introduced in the 1950s with mono tube amplifiers. However, installing a tube amplifier in a subwoofer has several drawbacks. So there was the audio duo and the two-wire from the stereo show, which many people misunderstood and often damaged expensive hi-fi equipment.
The images above show that less experienced people can easily understand what the hi-fi dictionary says for the first solution: An audio system configuration where two separate amplifiers are used to drive the individual speakers in a loudspeaker systemiacze” and for the second: “Dual-cable connection is a rather old idea, but first-time users often have different doubts and fears.”. Even with such an unambiguous definition, many can be misunderstood. Amplifiers for such connections must have specially adapted passive transmissions. This cross design is relatively simple in principle, but it can be confused with the ambitions of different manufacturers. In the first case, crossovers connected before the amplifiers are a more practical solution.
For a good cash register, the digital crossover is a relatively new solution, and at a low price, it can be more accurate than an analog solution. A simple solution with this crossover has long been used in computers to output the bass amplifier. The British KEF offers a very elegant solution, which of course could be better. Currently, it is adapted to the requirements of RTV viewing with embedded systems. It is hardware dependent and therefore contains DAC duplication. The Finnish product offers more advanced solutions with software support, which is mentioned in the entry entitled “Active studio monitors with automatic room calibration system.
The passive junction behind the power amplifier consumes electricity, and the more “handle” it is, the more expensive its components should be.
Active crossover before power amplifiers is a more efficient solution, but with conventional amplifiers it is quite bulky. It is more practical to combine it with the speakers in the speaker housing. On the other hand, digital crossover has almost unlimited development potential.