The life of a speaker depends on the quality of the voice coil. The voice coil is the heart of the speaker. Now I will introduce the knowledge of the voice coil to the reader.
The voice coil is divided into ∮13.28, ∮14.28, ∮16.4, ∮19.43, ∮20.4, ∮25.5, ∮25.9, ∮30.5, ∮38.5, ∮35.5, ∮44.3, ∮49.5, ∮50.5, ∮5 , ∮60, ∮64.5, ∮75.5, ∮76.5, ∮78.6, ∮99.2, ∮100.2 and so on. According to the frequency response, it can be divided into low frequency, middle frequency and high frequency speaker voice coil. According to the material of the voice coil, there are PL, PSV, AL, ASV, KSV, etc. The first letter is the code of the voice coil skeleton material, P represents the paper tube, A represents the aluminum sheet, L is the temperature resistant 135 ℃ wire, SV represents Temperature-resistant 180 ℃ wire (temperature-resistant means that the glue attached to the surface of the wire will not fail at this temperature), K is a special material (glass fiber), the English name is KAPTON, and the temperature resistance is above 220 ℃. According to the number of layers wound by the voice coil, it can be divided into single layer, two layers, four layers and six layers. For the quality of the voice coil, first of all, from the outside, look at whether the wound wire is flat and clean, whether there are jumpers, looseness, overlap, whether the surface insulation of the wire is peeled off and scratched, and whether the sticker facing the wire is swollen or warped. Whether the inner diameter wall of the voice coil is smooth, whether there are burrs, and whether the resistance value is standard or not.
In addition to the frequency response and power of the loudspeaker, in addition to the strength of the magnetic field of the magnetic steel and the diaphragm, the impedance of the voice coil, the width of the wire, the size of the wire, the voltage and temperature resistance, and the maximum allowable current. For example: ASV∮25.5 & TImes; 30H & TImes; 3.6Ω & TImes; 0.26 / 4F means that this voice coil skeleton uses aluminum sheet (A), wire (SV) with temperature resistance above 180 ℃, voice coil inner diameter ∮ 25.5mm, voice coil height 30mm, impedance 3.6Ω, use ∮0.26 wire, around four layers. To make a voice coil, you must first know these.
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