Conversely, if the box is too big the driver will move too easily and have trouble stopped and reversing. If the box is too small and sealed the cone will have a hard time moving, this is called over damped. The box presents some air movement resistance to the driver system. First of all, why is there a box? The box serves and obvious purpose as the sound waves from the back of the driver need to be isolated from the sound waves from the front. More exotic materials for the cone to be stiff and light cost more.Īnother key factor is the box size and design. Tighter gap for the voice coil requires more precision in manufacturing which costs more. Also, the wire needs to be heavy enough to handle the power you want in your amp but heavier wire adds weight which slows down the cone.īetter magnets cost more. More turns of wire makes more power but adds weight. You can get more power by having more magnet flux, a narrower gap for the flux to cross over the voice coil, or more turns of wire on the voice coil. The way the motor works in a speaker driver is the magnet generates flux which is concentrated around the voice coil. If the cone is too light it will distort under high output so it needs to be light and stiff and just heavy enough for the max output you want to achieve. There are two ways to make a car accelerate quicker, a lighter car (cone) or a more powerful motor (magnet and voice coil). Think of the cone as a car and the magnet and voice coil assembly as the motor. To do this the cone needs to react instantly and accelerate very quickly but when it's time for the cone to turn around and go back the other way you need the cone to stop instantly and reverse direction. You want the cone to perfectly follow the audio signal coming from the amp. The magnet and voice coil apply force to the cone.
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