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<blockquote data-quote="hispls" data-source="post: 8641631" data-attributes="member: 614752">I&#039;ve never gained much by moving seats around but if you&#039;re competing&nbsp; a tenth here and a tenth there adds up especially if you&#039;re pretty neck and neck with someone else in your class it can be fun.&nbsp;&nbsp; Where you sit in the vehicle can make a difference too or if you stand outside.&nbsp; Test EVERYTHING.37hz PEAK is low for SPL especially with so little piston area.&nbsp; Are you actually tuned there or a little lower?&nbsp; &nbsp; If you&#039;re crowding the port into a hard surface in the vehicle it&#039;s almost definitely NOT tuning where modeling software says it is.&nbsp;&nbsp; In the second graph (I assume this is just your response curve at lower power) there seems to be a second peak up in the mid 50s.&nbsp; That is probably where the truck wants to peak.&nbsp;&nbsp; Most woofers won&#039;t actually peak right at port tuning frequency so do some modeling and see what size and port tuning gives you the best peak centered around that spot and then see what kind of number you can get.&nbsp;&nbsp; Small box with big external flared port I&#039;d think considering power isn&#039;t an issue and it&#039;ll give you more flexibility to move it around and tweak tuning.</blockquote>

[QUOTE="hispls, post: 8641631, member: 614752"] I've never gained much by moving seats around but if you're competing a tenth here and a tenth there adds up especially if you're pretty neck and neck with someone else in your class it can be fun. Where you sit in the vehicle can make a difference too or if you stand outside. Test EVERYTHING. 37hz PEAK is low for SPL especially with so little piston area. Are you actually tuned there or a little lower? If you're crowding the port into a hard surface in the vehicle it's almost definitely NOT tuning where modeling software says it is. In the second graph (I assume this is just your response curve at lower power) there seems to be a second peak up in the mid 50s. That is probably where the truck wants to peak. Most woofers won't actually peak right at port tuning frequency so do some modeling and see what size and port tuning gives you the best peak centered around that spot and then see what kind of number you can get. Small box with big external flared port I'd think considering power isn't an issue and it'll give you more flexibility to move it around and tweak tuning. [/QUOTE]

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