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<blockquote data-quote="Papermaker85" data-source="post: 8479531" data-attributes="member: 572595"><p>check it.. grab you a 4" cheap motor and test soft parts BEFORE ya drop 5k. i'm pretty familiar with designs while im not nearly as seasoned as nick, George or Jacob i've put together a few woofers and i have general knowledge so to speak.</p><p></p><p>a low FS does necessarily indicate greater lowend output there is a point of diminishing returns</p><p></p><p>when your building a woofer for a ported box you have to understand and compensate for the alignment you wish to use and how the enclosures dampening affects the woofer in order for it to sound a certain way.</p><p></p><p>you want a large box woofer or you prefer to use a smaller box and keep group delay low? do you want it to be peaky in 5-10hz or you want something with abit wider bandwidth? how low do you want it to play? i typically don't tuned be about 32 unless the design forces me too. like for example 24 or so for HT drivers..</p><p></p><p>the softer spiders require smaller boxes to keep the dampening high enough to properly control the woofer. the stiffer spiders can use a mush larger more efficent box by haveing much more control over the mass vs using hte com,pliance of the box to control the mass. typically the stiffer suspension and lower QE drivers peak harder and can have a higher total system efficiency from taking advantage of the larger box/port area. granted you loose alittle SQ because of hte phase shift and high group delay.</p><p></p><p>personally i build around 3 concepts. low mass, linear as possible designs while maintaining dampening for the alignment and excellent cooling/high power compression limits. the low mass helps automatically to be-able to LINEARLY control the mass both mechanically and electrically. you start stacking spiders and using several glue joints it only adds the possibility of non-linear stroke. some of the higheest distortion figure come from mechanical parts of the woofer at high output levels.</p><p></p><p>good luck and keep us updated</p></blockquote><p></p>
[QUOTE="Papermaker85, post: 8479531, member: 572595"] check it.. grab you a 4" cheap motor and test soft parts BEFORE ya drop 5k. i'm pretty familiar with designs while im not nearly as seasoned as nick, George or Jacob i've put together a few woofers and i have general knowledge so to speak. a low FS does necessarily indicate greater lowend output there is a point of diminishing returns when your building a woofer for a ported box you have to understand and compensate for the alignment you wish to use and how the enclosures dampening affects the woofer in order for it to sound a certain way. you want a large box woofer or you prefer to use a smaller box and keep group delay low? do you want it to be peaky in 5-10hz or you want something with abit wider bandwidth? how low do you want it to play? i typically don't tuned be about 32 unless the design forces me too. like for example 24 or so for HT drivers.. the softer spiders require smaller boxes to keep the dampening high enough to properly control the woofer. the stiffer spiders can use a mush larger more efficent box by haveing much more control over the mass vs using hte com,pliance of the box to control the mass. typically the stiffer suspension and lower QE drivers peak harder and can have a higher total system efficiency from taking advantage of the larger box/port area. granted you loose alittle SQ because of hte phase shift and high group delay. personally i build around 3 concepts. low mass, linear as possible designs while maintaining dampening for the alignment and excellent cooling/high power compression limits. the low mass helps automatically to be-able to LINEARLY control the mass both mechanically and electrically. you start stacking spiders and using several glue joints it only adds the possibility of non-linear stroke. some of the higheest distortion figure come from mechanical parts of the woofer at high output levels. good luck and keep us updated [/QUOTE]
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