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  #1  
Old 11-26-2009, 10:22 AM
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Default Why are 4inch coils so rare?

I've been wondering this for a while but I find that not many companies use 4" coils on their top models anymore. Is this because they have found a way to get a 3" coil to handle enough power and allow for more spider area?

Discuss.
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  #2  
Old 11-26-2009, 10:34 AM
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expensive and not practical..

most people don't need them, even if they think they do. plenty of 3" coil woofers that you can't, aside from clipping, burn the coil up on.
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Old 11-26-2009, 10:35 AM
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Quote:
Originally Posted by strpperpolef150 View Post
I've been wondering this for a while but I find that not many companies use 4" coils on their top models anymore. Is this because they have found a way to get a 3" coil to handle enough power and allow for more spider area?

Discuss.
Prolly cuz its soooo much overkill for the normal consumer.

3in with the right parts can take pretty much anything someone normal will throw at it.
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Old 11-26-2009, 10:42 AM
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Those are great explanations and understood for the average person but what about competitors who like to throw gobs of power at subs? I've seen some 3" coils take huge amounts of power but would their be any benefit to having a 4" coil?
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  #5  
Old 11-26-2009, 10:44 AM
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Quote:
Originally Posted by strpperpolef150 View Post
Those are great explanations and understood for the average person but what about competitors who like to throw gobs of power at subs? I've seen some 3" coils take huge amounts of power but would their be any benefit to having a 4" coil?
Pros (kinda):
Nice heavy coil
Greater thermal cooling
Its cool


Cons:
Expensive
Hard to find parts for
The same thing can be done with a 3" coil
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Old 11-26-2009, 10:46 AM
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Quote:
Originally Posted by grimreper912003 View Post
Pros (kinda):
Nice heavy coil
Greater thermal cooling
Its cool


Cons:
Expensive
Hard to find parts for
The same thing can be done with a 3" coil
i dont think a 3" coil on most subs will take 4-5k like a 4" would.
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Old 11-26-2009, 10:48 AM
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well the 4" will probably handle more than the 3" granted all the other parts are up to par. like the atomic apxx with a 3" coil can handle "25k" for burps while the apxx with a 4" coil can handle "30k" for burps. atleast thats what i heard from atomic.
but yeah if you look at cost of parts for 4" coils they are more expensive and the average person is not going to put even 25k on a sub for a burp.
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Old 11-26-2009, 10:48 AM
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Quote:
Originally Posted by RidnClean View Post
i dont think a 3" coil on most subs will take 4-5k like a 4" would.
I think it can be done. Proper cooling and if you set your signal correctly. Also depends if we are talking about a 15 second burp, 30 second burp or music.
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Old 11-26-2009, 10:48 AM
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For one thing, with a 4" coil you need to use larger wire to get the same winding height as a 3" coil at the same impedance. This means the 4" coil will have more mass and a lower FS than a 3" coil with the same winding height and impedance.
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Old 11-26-2009, 10:50 AM
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^dont they usually conpensate for that? my apxx has a fs of 37 which isnt to high but its deff not a ht sub.
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