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<blockquote data-quote="SpeedEuphoria" data-source="post: 6973615" data-attributes="member: 623992">BTW this IS the Box I think? that Polk spec&#039;s for those subs:<img src="http://i115.photobucket.com/albums/n314/speedeuphoria/Polk10spic-1.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />See where I changed the port length total so it now equals the 18&quot; that polk suggests, not the 32.5&quot; like you had it. Crap they figure it off the back wall, which would make the tuning even higher and the box slightly bigger.Not sure how polk wants you to do it. If like the RE calc your tuning will be more like 40hzThis would be with 18&quot; port length as RE calc figures it.<img src="http://i115.photobucket.com/albums/n314/speedeuphoria/Polk10s2.png" alt="" class="fr-fic fr-dii fr-draggable " style="" />If we knew the sub displacement then we would know which one is right, it may be the 2nd one, but thats kinda high tuning.On another note, most here dont go exactly by the manufacturers specs. They go slightly bigger box and normally tune 30-35hz, maybe more for 10&#039;s? Also they use 12-16 square inches of port per cube(mostly 16). But most want to get Loud.</blockquote>

[QUOTE="SpeedEuphoria, post: 6973615, member: 623992"] BTW this IS the Box I think? that Polk spec's for those subs: [IMG]http://i115.photobucket.com/albums/n314/speedeuphoria/Polk10spic-1.jpg[/IMG] See where I changed the port length total so it now equals the 18" that polk suggests, not the 32.5" like you had it. Crap they figure it off the back wall, which would make the tuning even higher and the box slightly bigger. Not sure how polk wants you to do it. If like the RE calc your tuning will be more like 40hz This would be with 18" port length as RE calc figures it. [IMG]http://i115.photobucket.com/albums/n314/speedeuphoria/Polk10s2.png[/IMG] If we knew the sub displacement then we would know which one is right, it may be the 2nd one, but thats kinda high tuning. On another note, most here dont go exactly by the manufacturers specs. They go slightly bigger box and normally tune 30-35hz, maybe more for 10's? Also they use 12-16 square inches of port per cube(mostly 16). But most want to get Loud. [/QUOTE]

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