Xmax

[eric78702 10+ year member]

What does Xmax mean when you are looking at the sub specs?

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[jake760 10+ year member]

I believe it is how far the cone can move in one direction while maintaining linear motor force. Or something like that.

 

[-01limited- 10+ year member]

Subwoofer T/S Parameters//content.invisioncic.com/y282845/emoticons/santa.gif.e1ec9cf2e0a0dd232ad35aa594a126d0.gif

 

[-01limited- 10+ year member]

I believe it is how far the cone can move in one direction while maintaining linear motor force. Or something like that.

Something like that:

 

[eric78702 10+ year member]

So it has to do with the excursion of the sub?

 

[-01limited- 10+ year member]

So it has to do with the excursion of the sub?

Correct. The higher the xmax, the more your cone is gonna travel.

 

[eric78702 10+ year member]

Does a higher Xmax make the subs hit the lows better or it doesn't really matter?

 

[-01limited- 10+ year member]

Does a higher Xmax make the subs hit the lows better or it doesn't really matter?

I'd say there are a lot more factors to getting a sub to hit lows than the xmax. I've been kinda researching this topic a lot lately and it seems that it has to do more with motor strength and other factors of the sub. An analogy that kept popping up was "its not how far you can throw a punch, but how hard you can throw the punch":readytog:

 

[eric78702 10+ year member]

Yeah I've also been told a lot that it all depends on the box. That will determind how the lows will sound.

 

[-01limited- 10+ year member]

Yeah I've also been told a lot that it all depends on the box. That will determind how the lows will sound.

Honestly a box probably makes the biggest difference out there. Some of the subs specs will help you with the size and design of your box also.

 

[eric78702 10+ year member]

But it all come down to the box and power doesn't it?

 

[nateberrier 10+ year member]

box and motor force/power help but on the low notes you have to be able to get a good amount of excursion with good control but i would say the first two mentioned are most important by far. tons of hard spiders help too lulz.

 

[sundownz Pro Seller]

From the prior link :

"Excursion limit due to the magnetic limitations of the driver's motor. Xmag is defined as the displacement at which the BL product has fallen to 70% of its value at the cone's rest position."

That is fairly standard in the industry -- it is how I rate our drivers.

A driver can technically move WELL beyond x-max but BL related distortion will be pretty high beyond it.

More linear x-max will help with low frequency extension -- especially in a sealed box -- but other specs will also have alot to do with it... but say you have two identical drivers spec wise one has 10mm x-max and one has 30mm... safe to say the one with 30mm has alot more maximum output at low frequencies.

 

[eric78702 10+ year member]

Motor force?

 

[helotaxi 5,000+ posts]

^^^How much force the motor (magnet assembly and coil) can exert on the cone. In a ported enclosure, this largely determines the maximum output of the system.