How To Overhaul Your Woofer's Voice Coil!

　　The woofer is a kind of horn. It turns the electronic signal into a sound transducer. It consists of an electromagnet, a coil, and a speaker film. It converts the current frequency into sound. According to the principle of physics, when the current passes through the coil to generate an electromagnetic field, the direction of the magnetic field is Right hand rule. Suppose, the speaker plays the C tone, and its frequency is 256Hz, that is, vibrates 256 times per second, the speaker outputs 256Hz alternating current, and the current changes 256 times per second, emitting the C tone frequency. When the electric coil vibrates with the speaker membrane, it pushes the surrounding air to vibrate, and the speaker produces sound.

　　How To Overhaul Your Woofer's Voice Coil!

　　The following describes how to repair the common woofer fault coil burnt, open circuit or short circuit; the coil and the magnet touch

　　Maintenance method:

　　1. First, use a utility blade to make the joint between the dust cover and the paper cone along the slope of the paper cone, draw a small opening about 2 to 3 mm in the knife, and slowly tear it by hand, taking care to prevent damage to the paper cone.

　　2. Find the voice coil and use a multimeter to find the open circuit, which is usually the connection between the voice coil and the copper wire. After soldering with a soldering iron, use AB glue to restore it. Be careful with the voice coil. If there is any deformation, the cone will be wiped, and the sound will not sound right. A lot of AB glue is applied between the paper cone and the voice coil, otherwise it will sound bad. broken sound.

　　3. If the voice coil of the entire woofer is damaged and the burnt scorch marks can be seen, replace the voice coil directly. When replacing, look at the resistance and parameters of the voice coil. After the replacement, just glue it according to the original assembly. Finally, You can connect the power amplifier test machine successfully.

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