SD + XMAX = SPL ...correct?
50 Watt CAFz'r
Joined: Nov 2001
Posts: 306
Originally Posted by ShockingCanada
yes 4" coils are better at cooling however power handling doesn't have anything to do with former size it has to do with the wire guage. If you put a tiny wire on a 4" former it won't handle as much as a bigger wire on a 2.5" former. The only reason people don't do it is because to use a thick wire you need a longer length to get the same impedance so you either increase the coil height or the diameter which is why 4" coils handle more power, but it has nothing to do with the fact that its 4" and everything to do with the wire size. Also as for 4" coils being louder than 2.5" coils its IMPOSSIBLE to say that because its IMPOSSIBLE to prove it since the coils won't fit the same motor so a comparison can't be done.
Current handling has to do with wire size.
Current does NOT = power.
4" coils use a bigger motor than a 2.5" coil. That is why they're louder.
And yes, I can say a 4" coil is louder than a 2.5" coil because my subs with 4" coils are the loudest.
Now prove me wrong.
Originally Posted by A-Rok
4" coils use a bigger motor than a 2.5" coil. That is why they're louder.
And yes, I can say a 4" coil is louder than a 2.5" coil because my subs with 4" coils are the loudest.
And yes, I can say a 4" coil is louder than a 2.5" coil because my subs with 4" coils are the loudest.
But if there was a sub with a 3" coil that has the same SD and acheived the same xmax as your sub, yours would still be louder?
Last edited by andrewsfm; Mar 24, 2007 at 09:25 PM.
Why do people ignore the *minor* thing called install when arguing over which sub is the loudest?
And why on god's green earth do people bench-race t/s parameters, and at the same time completely ignore knowledgeable people with personal experience?
I say do a test with 3 subs, one with a 2.5" VC, one with a 3" VC and one with a 4" VC (similar impedances, all with similar xmaxes, similar installations in the same vehicle). Put each in their "recommended" enclosures and plug them into a 110V outlet for a full 3 seconds and measure what they do on the TL. Follow that up with a 240V outlet.
Best sub wins.
And why on god's green earth do people bench-race t/s parameters, and at the same time completely ignore knowledgeable people with personal experience?
I say do a test with 3 subs, one with a 2.5" VC, one with a 3" VC and one with a 4" VC (similar impedances, all with similar xmaxes, similar installations in the same vehicle). Put each in their "recommended" enclosures and plug them into a 110V outlet for a full 3 seconds and measure what they do on the TL. Follow that up with a 240V outlet.
Best sub wins.
50 Watt CAFz'r
Joined: Nov 2001
Posts: 306
Originally Posted by andrewsfm
So you're saying that it's all about the coil and motor size...
But if there was a sub with a 3" coil that has the same SD and acheived the same xmax as your sub, yours would still be louder?
But if there was a sub with a 3" coil that has the same SD and acheived the same xmax as your sub, yours would still be louder?
Which sub is loudest depends on your power, the sub design, your install, too many factors. I wager that most people here will get loudest with a 3" coil due to other limitations in their system.
Originally Posted by SPLN00B2
But if there was a sub with a 3" coil that has the same motor size as a sub with a 4'' coil, which one would be louder?
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Originally Posted by The A Team
Well the clear winner would be the sub with the 2.5" coil made by an engineer.
All else equal a 4" coil will only have advantages over something smaller.....
But I can also show many examples of low power 4" coils...... maybe not in car audio, but in the pro audio world coil dia is most certainly not the last word on power handeling or performance.... that said Id be careful claiming that 4" coils will always give a stronger or more powerful motor...
hmm.. my midbass speakers have 3" voice coils... but they can only handle about 175wRMS....
But I can also show many examples of low power 4" coils...... maybe not in car audio, but in the pro audio world coil dia is most certainly not the last word on power handeling or performance.... that said Id be careful claiming that 4" coils will always give a stronger or more powerful motor...
hmm.. my midbass speakers have 3" voice coils... but they can only handle about 175wRMS....
