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What exactly does a higher Xmax on a sub provide?
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<blockquote data-quote="akheathen" data-source="post: 7476068" data-attributes="member: 629234"><p>theory? well x-max is total maximum movement(from a new sub) all will depend on how you tune the enclosure and the motor controll it will have, but plain an simple, more <strong>X-MECH</strong> is going to move more air for a given cone area, being allowed to do so. generally, the more x-mech, the lower the fs may be. the reason i am accentuating "x-mech" is that you can see x-max all over, usually having an x-mech 2x what the x-max is (x-max is the movement from dead rest to max excursion, where x-mech is total movement peak-to-peak) sometimes, you will find a sub sneak a deceptive x-max, where you will have as much as 3-4x as much forward movement from rest as bottoming movement. many times i've seen something like "15mmx-max, 21mm x-mech" also, make sure that the x-max, is not actually representing x-mech. i am actually seeing that more common nowadays. it's one cheat to sell you on the better sounding figure. for instance, sub "a" has an x-max of 17mm, and sub "b" has an x-max of 22.... while 22 does sound alot better than 17, manufacturer "a" advertises correct x-max, and manufacturer "b" is representing x-mech, usually with a astrix, or foot-note of "p-p", and the real comparison is 34mm vs 22mm. now, there are also more factors. lloking at the qts, bl, and other parameters may allow you to push the 2 subs in different ways, and the lower x-max sub might be able to be run harder in a restricted enclosure option, where the larger movement could simply allow you to gain a little efficiency off a lower power level without exceeding the suspension limits</p></blockquote><p></p>
[QUOTE="akheathen, post: 7476068, member: 629234"] theory? well x-max is total maximum movement(from a new sub) all will depend on how you tune the enclosure and the motor controll it will have, but plain an simple, more [B]X-MECH[/B] is going to move more air for a given cone area, being allowed to do so. generally, the more x-mech, the lower the fs may be. the reason i am accentuating "x-mech" is that you can see x-max all over, usually having an x-mech 2x what the x-max is (x-max is the movement from dead rest to max excursion, where x-mech is total movement peak-to-peak) sometimes, you will find a sub sneak a deceptive x-max, where you will have as much as 3-4x as much forward movement from rest as bottoming movement. many times i've seen something like "15mmx-max, 21mm x-mech" also, make sure that the x-max, is not actually representing x-mech. i am actually seeing that more common nowadays. it's one cheat to sell you on the better sounding figure. for instance, sub "a" has an x-max of 17mm, and sub "b" has an x-max of 22.... while 22 does sound alot better than 17, manufacturer "a" advertises correct x-max, and manufacturer "b" is representing x-mech, usually with a astrix, or foot-note of "p-p", and the real comparison is 34mm vs 22mm. now, there are also more factors. lloking at the qts, bl, and other parameters may allow you to push the 2 subs in different ways, and the lower x-max sub might be able to be run harder in a restricted enclosure option, where the larger movement could simply allow you to gain a little efficiency off a lower power level without exceeding the suspension limits [/QUOTE]
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What exactly does a higher Xmax on a sub provide?
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