Amateur speaker production

Thoughts on amateur production of speakers <1>

The speaker occupies the most important position in the audio system, which has been recognized by everyone. Because it is the final pass for music restoration, that is to say, the audio signal is finally restored to sound by the speaker (speaker); it is conceivable that the quality of the speaker (including the sound quality and efficiency balance timbre) is crucial to the entire audio system important.

Amateur DIY speakers are the most affordable and most successful. Many people say that DIY speakers are impossible to succeed under amateur conditions, but I think it is different now. The progress of society and the development of technology have provided industry enthusiasts with more than good conditions. For example, there are many high-performance speakers and crossover components available for purchase, technically with the help of network experts, etc.; in the audio system, the speakers involve the least electronic knowledge, and enthusiasts can basically master it through short-term learning The method of DIY speakers is of course not easy to do well. The key to the correct thinking is the accumulation of experience.

There are two main difficulties in DIY speakers: one is the production and adjustment of the crossover, and the second is the cabinet structure design; hobbyists should avoid the most important things to determine what kind of speakers to make, this is the first step towards success.

I talked about this today. I have limited skills and lack of experience. I just try to tell my fellow fans what I think of. Please criticize and correct me!

 Thoughts on amateur production of speakers <2>

Personal abilities are always limited, so it is a good strategy to maximize strengths and avoid weaknesses, especially for amateur DIY. After analysis, the author believes that there are three speaker systems that are more suitable for amateur DIY:
<1> Two-unit two-way bookshelf box.
〈二〉Three-unit two-frequency floor box;
<Three> Three-unit 2.5-frequency floor-to-ceiling box; the following is a brief analysis.

1) Two-unit two-frequency division: This is the most common and classic system, and its advantage is that the frequency division network is (relatively) simple and the cabinet production is also more convenient. The production of this system must first pay attention to the choice of speakers and the matching of treble and mid-bass.

2) Three-unit two-frequency division: In fact, it is an expansion of the previous system, that is, adding a same mid-bass unit (parallel and series methods) to enhance the low-frequency response of the system; therefore, there is only one crossover point, but There are many changes to the cabinet.

3) Three-unit 2.5 frequency division: It is also expanded on the basis of the first type of system, that is, adding a subwoofer unit. Although there are two crossover points, the subwoofer (passive) frequency division network is extremely simple. So it's not too difficult.
At present, almost all DIY kits are nothing more than these three modes, which are for the convenience of amateur DIY enthusiasts; and the three types of finished boxes on the market also account for the vast majority, which shows that manufacturers try to choose simple tasks as much as possible. , So the success rate is high! Next time I will talk about the purchase of units and other issues, welcome everyone to criticize and correct, thank you!

Thoughts on amateur production of speakers (3)

Now that we have talked about it, let's talk about the purchase of the speaker unit:
For those with certain hearing, you should first consider that the tone of the speaker is what you like. The tone of the speaker is mainly determined by the material of the vibrating cone. There are many contents here. Please refer to the relevant information. It is best to have actually listened to it.

Secondly, it is necessary to fully consider the effective connection of the tweeter and the mid-bass unit. For example, the upper limit of the ordinary mid-bass unit is only about 5KHZ, and the lower limit of the treble is only about 3KHZ. This is still the manufacturer's information. The actual situation is hard to say. It is difficult to guarantee, so it can be seen that the crossover point is only 3KHZ-5KHZ, and the upper limit of the fever mid-woofer unit is 7K--8KHZ and the lower limit of the tweeter is 1K--2KHZ, so it is better to have mid-bass and tweeters. One is the fever unit. (Take 6.5 inches as an example)

It is extremely undesirable to buy two treble and bass on the street, and then make your own crossover and box according to a certain book. Such a unit has no parameters and no guarantee of quality. It is absolutely necessary to buy an old brand-name unit; it is best to buy a kit , The success rate is high, and the profit of about one hundred yuan is to be given to the merchants. But you must not buy high-priced kits, such as Hivi. Can't make a good noise and cost money! Box system is the advantage of DIY. You can give full play to your imagination. The deeper you understand the theory of speaker structure, the better you will do. I sincerely wish you all the success of DIY speakers!
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