why do speakers have a magnet?
does it matter how much the magnet weights
- cplkittleLv 61 decade agoFavorite Answer
The magnet is part of the 'motor' of the sub. The coil inside the magnet has alternating current running through it. The coil acts as an electromagnet and pulls itself up or pushes itself down moving the cone of the speaker.
The bigger the magnet, the stronger the magnetic field inside the speaker where the coil is.
The size of the magnet is not something that should be considered when shopping for a sub. Anyone can put a huge magnet on a piece of crap speaker. The trick is to balance the motor strength with the resistance of the spider and the weight of the cone so that one is not that much stronger than the other.
There is no real trick to comparing subs. Basically you get what you pay for.
- Anonymous1 decade ago
if you ever get two magnets and put them in front of each other, oposite poles atract but one positive and one negative repel, so the same with speakers , to make the cone move the use a magnet , and a voice coil the idea of the voice coil is to have a magnetic field that can be altered for diferent frequencies or strength, and it also has to be lightweight , so when the amp pushes a current through the voice coil it makes it magnetic pulling or repelling from or against the magnet , generating sound waves, AND YES , the hevier magnets are better, the bigger the magnet gets the bigger the sound will be practically, and the magnet will be able to have more control over the cone, sience the magnet is what is used to repel the voice coil the stronger the magnet, the stronger the magnetic field will be in which the voice coil reacts to the magnet
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- oklatomLv 71 decade ago
So the speaker cone will have something to be attracted to or push against, producing vibration which is then heard by your ears as "sound".
To a point anyway, the bigger the magnet the better the sound. There is a coil of wire at the smallest part of the speaker that acts as an electromagnet. Without the other magnet, there would be no movement of the speaker cone, therefore no sound.
- 7 years ago
The magnet is required for it's magnetic field. The voice coil is not a magnet but rather a magnetic field generator. Useful if you ever need to destroy electronics. That field has an affect on the magnet at the base. Which cause the coil to be drawn in or pushed away. There is only one magnet., but two fields intersecting.
- 1 decade ago
The heavier the magnet the more noise the speaker will make.
The magnet works against an electromagnet . When audio signal goes through the electro magnet the electromagnet activates and causes the speaker to vibrate and make noise.
- DorothyLv 45 years ago
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probably if the magnetic field is as strong as I think it is, from your description of the speaker placement - then the speaker in the CB will be affected the CB will probably transmit & receive fine - but you probably will have to use an external CB speaker to hear the received signal
- Anonymous1 decade ago
because the sound is generated by electrical pulses, the magnet is attached to the membrane, when the electrical pulses go throught the magnet they vibrat making the membrane vibrate. This produces the sound. So without a magnet there would be no speaker.