Time domain characteristics are very important indicators of loudspeaker systems. Many professional terms used to evaluate the sound performance of loudspeaker systems are related to them, such as transient response, hierarchy.
Sense, clarity, location of sound field and so on. Engineers in the electroacoustics industry have done a lot of research on time-domain properties, but only qualitative analysis and a few
It is assumed that even the authoritative American electroacoustic testing system, LMS, does not have the test function of time domain characteristics.

With the rapid development of computer science and technology, the time-domain characteristics of loudspeaker system can be quantitatively measured and analyzed. There are DAAS in West Germany, LAUD in America, Italian and some of our domestic test instruments in the test system. The test of time-domain characteristics has a high requirement on the test environment. The test results of a computer test system in a free environment can only be used as a reference.

The characteristics of time domain mainly include the following aspects:

Step response

Step response, also known as transient, refers to the speed of the loudspeaker system to follow the input signal, of course, the faster the better, and also sensitive to weak signals.

The transient response index of loudspeaker system is related to many factors. The box horn unit, frequency dividing circuit and components, and even the wiring all affect it. The loudspeaker system with good transient characteristics "moves like wind, static as a clock", can accurately and faithfully counter.

Reflecting the instantaneous changes in audio signals, enthusiasts are pursuing the "infinite size, fiber must appear" is actually a pursuit of speaker transient characteristics.

Transient is speed. The factors that affect speed are not only speaker system and sound source, but also amplifier. The transmission speed of audio current between silver wire and copper wire is very different (not only the resistance value is so simple).

Similarly, copper wire is divided into brass wire (copper aluminum alloy), copper wire (pure copper wire), multi-N copper wire (N is the first letter of English 9, such as 6N for 99.9999%), single crystal copper wire, single strand wire, multi-strand wire, and even multi-strand special stranded wire, a wide variety of words.

All of this is about speed and timbre (which determines the main component of timbre). The gallbladder goes to the stone machine faster, from analog to digital circuits faster, the silver wire can't catch up with the so-called non-resistive carbon fiber line, and the cable will certainly travel half a beat slower than the fiber.

How fast is it going to be? Digital circuits are very advanced today, and someone comes out and says, "Digital tastes bad, and old-fashioned craftsmanship is much more addictive (craftsmanship is slower). "The public says that the public is reasonable."

There is no need to argue whether the equipment is fast or slow, as long as you like it. But for loudspeaker system, the author personally preferred faster, perhaps is a "occupational disease", more attention to test indicators, for a few

People agree that the music is very strong, but the speaker system with poor time domain characteristics disagrees.

This so-called musical flavor of things may have some special feeling to listen to a few slow songs, but whether the overall performance pass or not is a question mark.

Music is infinite. Don't simply divide it into strings, percussion, brass, voice, and symphony. Every nation in the world has its own music. What's the "musical flavor"? I think it's better to do a good job of electro-acoustic indicators honestly, and faithfully restore the feeding signal. If there is a signal, hurry up.

Open your mouth and shut up without signals. It's good to have no personality.  Damping is the primary factor affecting the transient performance of loudspeaker systems. It includes resistance Ni and mechanical damping of the horn unit, resistance Ni of frequency division networks, acoustic damping of the box, and even damping of the transmission medium (as experienced readers might think)

With the same set of equipment, there will be a slight change in the voice in sunny and rainy days when the air humidity is different.

Low damping loudspeaker system is a popular practice in the world at present. It is not difficult to see that the masters have done a lot of work to reduce damping in order to improve the transient response of loudspeaker system.

Several new units in Denmark's Weifa Speakers Famous Factory have copper short-circuit rings designed to improve the unit's high-frequency impedance, but also to reduce the resistance of the ni, one of which is the high-pitch unit with a bullet (forgetting what model, small cyclone used in high-end products); the PMC's famous eight-clawed fish low. The PU material is chosen as the edge of the sound unit to reduce the damping. If the readers are interested in listening, the low-frequency transient response is really good, listening to the drum is very interesting. PP sound basins, low damping butyl rubber dangling edges are also helpful, readers can also listen to it, the original high transient response speaker system is so lifelike and vivid.