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<blockquote data-quote="hispls" data-source="post: 8405453" data-attributes="member: 614752">For 250$ a whack what kind of cones are you getting?Assuming you get an extra cm before the spider hits the top plate, will you have an extra cm before the coil hits the bottom plate?&quot;Somewhere in the 30&#039;s&quot; is a pretty big difference when you&#039;re really pushing things to the limit.&nbsp; Tune to 31hz and the port will still control the cones down to mid to low 20s, though you may still run into mechanical limits as you approach 20 even if you tune around there (you begin to need a lot more displacement as you go down in frequency to maintain the same acoustic power).... tune to 38/39 and you&#039;ll need to be careful below 35.&nbsp; &quot;DD Box&quot; tunes within a couple cycles of 40hz and I promise you everything will be happy if you tune there and you will get huge output.&nbsp;&nbsp; Generally speaking, when you try to low-tune a woofer that&#039;s critically damped you&#039;ll wind up with a two humped camel for a frequency response which IMO sounds absolutely awful.&nbsp;&nbsp; Best to just sacrifice on the low extension and deal with it, or buy yourself some LMS 5400&#039;s, Re XXX, Sundown X, or similar that&#039;s designed to play pipe organ/whale songs.</blockquote>

[QUOTE="hispls, post: 8405453, member: 614752"] For 250$ a whack what kind of cones are you getting? Assuming you get an extra cm before the spider hits the top plate, will you have an extra cm before the coil hits the bottom plate? "Somewhere in the 30's" is a pretty big difference when you're really pushing things to the limit. Tune to 31hz and the port will still control the cones down to mid to low 20s, though you may still run into mechanical limits as you approach 20 even if you tune around there (you begin to need a lot more displacement as you go down in frequency to maintain the same acoustic power).... tune to 38/39 and you'll need to be careful below 35. "DD Box" tunes within a couple cycles of 40hz and I promise you everything will be happy if you tune there and you will get huge output. Generally speaking, when you try to low-tune a woofer that's critically damped you'll wind up with a two humped camel for a frequency response which IMO sounds absolutely awful. Best to just sacrifice on the low extension and deal with it, or buy yourself some LMS 5400's, Re XXX, Sundown X, or similar that's designed to play pipe organ/whale songs. [/QUOTE]

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