Master the basic details and ability of loudspeaker 1

- Sep 18, 2020-

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The simplest way to understand the performance and applicability of the horn is to understand the parameter meaning marked on the back of the horn. We can learn a little about the basic characteristics of the horn from its basic specifications. This article will introduce the basic parameters of the horn, such as "frequency", "response" and "sensitivity", and roughly understand the basic details of a loudspeaker from the appearance. Before purchasing, you can "have a spectrum in mind" on the data to know the basic characteristics of the horn. It will not be impossible to start with or understand the introduction of the salesperson.

What is fenestration? Why is it?

Simple understanding of loudspeaker crossover

As the name implies, the so-called sound splitting is to divide the human hearing frequency from 20 to 20 kHz into several frequency bands, and send them to the corresponding high, medium and low tone monomers. Its principle is to use capacitance, resistance and inductance to filter the signal sent by the amplifier above a certain frequency (low pass filter), or below (high pass filter, commonly known as high pass), or up and down (band pass, commonly known as band-pass). Through the high-low-pass electronic circuit, the whole range frequency is divided into low-frequency, intermediate frequency and high-frequency ranges. The electronic circuit to realize this kind of high and low pass is called .

Arendal's ˊ split network design almost uses customized parts in materials

Because there must be a working frequency between the high and low tone units, but we do not want to use the same frequency to pronounce at the same frequency, so there is a sound splitter. If you take apart the speaker box, you will see some wires and some passive parts, such as capacitors, resistors and inductors. These parts are the main components of the frequency divider network, commonly known as the frequency divider. Some manufacturers weld these parts to the circuit board, and some directly to the horn unit. Both methods have advantages and disadvantages.

Division is to let each monomer work together

The higher the order of the loudspeaker, the more subdivided it is for the sound splitter, so as to work in the best characteristic range, give play to the division and combination effect, and achieve the goal of hi-fi high fax. Therefore, the first important part of the loudspeaker is the splitter. The sound splitter (frequency divider) is the soul of the loudspeaker system. According to the position of the splitter on the signal path, the splitter can be divided into passive splitter and active splitter. The passive splitter is located between the power amplifier and the loudspeaker, while the active splitter is located in front of the power amplifier. Active voice splitter can be divided into analog and digital according to the mode of signal processing. Digital active voice splitter can usually provide functions other than voice splitting, such as limitation, delay, etc. Some people say that the splitter without external power supply is a passive splitter, which is described here as a passive splitter. The passive splitter has obvious disadvantages: it is bulky and consumes a lot of power, but the cost is relatively low. However, the cost of a high-efficiency passive splitter is likely to be more expensive than that of an active splitter, because the passive components that can withstand high voltage and current are very expensive.

The active splitter is located in front of the power amplifier in the signal path, and the signal level processed is also the small signal before being amplified; on the contrary, the passive splitter processes the large signal between the power amplifier and the loudspeaker. However, due to this characteristic, the active splitter has the possibility of adding extra noise.

An ideal full range loudspeaker system does not need a sound splitter. However, due to the wide spectrum range of audio signal, it is impossible to use the same loudspeaker unit to interpret the whole frequency response signal of 20 ~ 20kHz. Generally speaking, the large-diameter loudspeaker unit with more than 12 inches has good bass performance and little distortion, but it exceeds 1.5khz Its performance is very poor; the 1-2-inch tweeter has good performance when playing signals above 3kHz, but it can't play midrange and bass signals. However, although the purpose of sound splitting has been achieved, the passive components inside the frequency divider also consume the output power of the amplifier. In fact, the finer the division, the higher the positioning.