xmax???

[deLeo 10+ year member]

Xmax: 27mm

this means the sub can have a max 27mm of excursion?

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[Q&A 10+ year member]

No.

 

[deLeo 10+ year member]

so how will i know howmuch the sub moves.. i need 2 plan it to fit under my seat.~!@>~!

 

[Q&A 10+ year member]

Xmax is a measurement of how far the voice coil sticks past the bottom and top of the front plate devided by two. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

If you can get the subs xmech measurement you would know how far the sub is capable of moving one way, though you may never reach that limit in use.

 

[Rashaddd 5,000+ posts]

Xmax is how far the cone will move each way before you start getting a little more distortion and start to lose magnet force

 

[RAM_Designs 5,000+ posts]

Xmax is a measurement of how far the voice coil sticks past the bottom and top of the front plate devided by two. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

There's other ways to measure xmax, not just one.

 

[smd4life 5,000+ posts]

Xmax is a measurement of how far the voice coil sticks past the bottom and top of the front plate devided by two. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifIf you can get the subs xmech measurement you would know how far the sub is capable of moving one way, though you may never reach that limit in use.

ok

 

[smd4life 5,000+ posts]

honestly thats the most stupid statement i've ever heard

 

[thorshammer1 10+ year member]

Xmax is a measurement of how far the voice coil sticks past the bottom and top of the front plate devided by two. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifIf you can get the subs xmech measurement you would know how far the sub is capable of moving one way, though you may never reach that limit in use.

x2

 

[bonesninja 5,000+ posts]

Fs = resonance frequency of the driver. In free-air, the driver's impedance will peak at this frequency.

Pe = Thermal capacity of the driver, in Watts. If continuously driven above its rated Pe, the driver may prematurely burn out and fail.

Qes = Electrical Q of the driver at Fs. Qes is a measure of the driver's tendency to resonate at Fs, based on its electrical characteristics, e.g. magnet strength, magnetic circuit characteristics, etc.). The driver's overall resonance characteristics are usually dominated by Qes.

Qms = Mechanical Q of the driver at Fs. Qms is a measure of the driver's tendency to resonate at Fs, based on its mechanical characteristics, e.g. surround compliance, the compliance of the spider, weight of the cone, etc.

Qts = Total Q of the driver at Fs. Qts is a measure of the driver's tendency to resonate at Fs, based on its overall characteristics. Qts can be calculated using the equation:

Qts= Qms*Qes/(Qms+Qes))

Re = DC resistance of the driver's voice coil. Re is less than the driver's rated impedance (normally 4 or 8 ohms).

Sd = Effective surface area of the driver. Roughly equal to the area of the cone plus 1/3rd of the surround.

Xmag = [DUMAX] 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.

Xmech = Maximum physical excursion capability of the driver. Exceeding Xmech normally results in damage to the driver.

Xsus = [DUMAX] Excursion limit due to the driver's suspension. Xsus is defined as the point at which the compliance of the suspension has decreased to 25% of the value at the cone's rest position.

Xmax = Linear (one-way) travel of the cone. Xmax is used to determine the maximum linear SPL capability of the driver, and can be defined in a number of ways. The DUMAX definition is objectively the best one, and it is defined as the shorter of the Xmag and Xsus values, in each direction of cone travel. This definition is more useful than the older definition of Xmax, which was solely dependent on the length of the voice-coil vs. the length of the gap.

Vas = Equivalent air compliance. The volume of air that has the same compliance ("springiness") as the driver's suspension. Because less air is more "springy" than more air, a large Vas represents a "loose" suspension

Vd = Peak displacement volume. Vd = Sd*Xmax

 

[mrogowski 5,000+ posts]

Xmax = Linear (one-way) travel of the cone. Xmax is used to determine the maximum linear SPL capability of the driver, and can be defined in a number of ways. The DUMAX definition is objectively the best one, and it is defined as the shorter of the Xmag and Xsus values, in each direction of cone travel. This definition is more useful than the older definition of Xmax, which was solely dependent on the length of the voice-coil vs. the length of the gap.

Indeed. Unfortunately, not all companies state it that way. Some actually say peak-to-peak excursion as Xmax. Those kinds of statements are becoming less and less as consumers become more technically informed. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[thorshammer1 10+ year member]

peak to peak excursion is what I always believed xmax to be. Hmmmm Need to do some studying.

Thanks