Homemade labyrinth three-point speaker, Speaker
Keywords: homemade labyrinth three-point speaker
Homemade labyrinth triple frequency speaker
The speaker is made by the author two years ago, and the sound of listening effect is good, production methods and expensive will be exchanged. The elderly and young people are slightly different, and young people like to hear the rushing music, the elderly love to listen to classical music and light music, so the choice of speaker varies slightly. The labyrinth triple frequency speaker produced is a third modification of the early Hewei kit. First, the speaker structure is positioned as a labyrinth, and the midpet is closed.
There is not much to make a lot of speakers, and the structure of the box is shown in Figure 1.
The casing material is an insulating plate, a front plate thickness of 33 mm, a side panel thickness of 16 mm, and a base of 25 mm cast iron plate. The box is not used in front of the cabinet. The 7kg asphalt perfusion inner cavity, the inner cavity fills the glass fiber cotton, and a sponge and cloth are padded. With insulating board, the material is high, the quality is heavy, the processability is good, and the speaker requirements are met. The 25mm thick cast iron base is for weight. We know that the stiffness of the substance is related to the material, and it is also related to the thickness of the material, so when making a speaker, the front barrier will be thick. In order to prevent the vibration of the entire box, there must be a certain stability in addition to the stiffness of the box. The stability is related to the bottom area of the box, and is also related to the height of the force point. For speakers that have long body, the bottom area is small, and the center of gravity is high at the bottom of the speaker. Therefore, the stability of such speakers has to be considered, so that a 260 mmx280mmmx25mm cast iron plate is increased at the bottom of the speaker. This move adapts to any speaker.
The speaker is completed, connected to the power amplifier, audio source audition, and feel that the Sino-Tesque is a good performance, and the sound taste has changed. After listening to a few songs, I always feel less, inadvertently seeing the speaker line rust, so that the speaker line is removed, and the contact resistance is 2Ω! After cutting it, there is rustic line, The linear resistance is then measured, and the resistance is less than 0.5 Ω. Connect the sound box cable to reconnect, the effect is immediate. I often saw the magazine reporting the role and importance of the wire in the sound, but I can't always pay attention to my attention. This mistake made me pay attention to the quality of the wire. Later, it was highly improving, and there was also a high improvement in the transparency and brightness. In the past electronic theory learning, it only believed that the wire is better, and it is better to change the resistivity of the conductor. Didn't think of different conductors The electronics will actually have this characteristic in the transmission. The unexpected sound effect, so I am shocked, I hope everyone may wish. Figure 2 is a three-frequency circuit.
Author: Wang Changming
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