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<blockquote data-quote="audioholic" data-source="post: 6329767" data-attributes="member: 549629">Finally someone with some real world experience chimes in.The point of the 10mm vs 10mm xmax is, if both subs are moving the same amount in otherwise the same conditions, they will produce the same acoustic energy. It doesn&#039;t matter if one takes 10 watts to do it while the other takes 10,000 watts (say due to suspension stiffness differences). The trick is to find the happy medium between power handling, and excursion. You want to reach maximum excursion, at or very near tuning (where excursion is minimized), without melting the coil. This is why a serious SPL rig that has been tuned precisely (like Dante&#039;s) would bottom out the subs horribly if burped at the improper frequency. An SPL rig that is tuned just right is bordering on catastrophic speaker failure every time it burps. lol //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gifTo put it another way, the sub is burping at a point where enclosure tuning puts maximum damping on cone excursion (or almost, burp tends to be what Tommy, 10-15 hz above tuning?) so it takes alot of BL to overcome that damping effect. At the same time, pushing the cone to its maximum excursion potential, again while surpassing the enclosure&#039;s damping factor on excursion which is at its (almost) maximum. In order to perform this task, (generally) lots of wattage is needed to overcome the stiff speaker suspension and excessive enclosure damping. This wattage needs to be dissipated in the form of heat.Would you say that&#039;s an accurate general description of the controlled chaos of an SPL burp in a finely tuned rig?</blockquote>

[QUOTE="audioholic, post: 6329767, member: 549629"] Finally someone with some real world experience chimes in. The point of the 10mm vs 10mm xmax is, if both subs are moving the same amount in otherwise the same conditions, they will produce the same acoustic energy. It doesn't matter if one takes 10 watts to do it while the other takes 10,000 watts (say due to suspension stiffness differences). The trick is to find the happy medium between power handling, and excursion. You want to reach maximum excursion, at or very near tuning (where excursion is minimized), without melting the coil. This is why a serious SPL rig that has been tuned precisely (like Dante's) would bottom out the subs horribly if burped at the improper frequency. An SPL rig that is tuned just right is bordering on catastrophic speaker failure every time it burps. lol [IMG]//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif[/IMG] To put it another way, the sub is burping at a point where enclosure tuning puts maximum damping on cone excursion (or almost, burp tends to be what Tommy, 10-15 hz above tuning?) so it takes alot of BL to overcome that damping effect. At the same time, pushing the cone to its maximum excursion potential, again while surpassing the enclosure's damping factor on excursion which is at its (almost) maximum. In order to perform this task, (generally) lots of wattage is needed to overcome the stiff speaker suspension and excessive enclosure damping. This wattage needs to be dissipated in the form of heat. Would you say that's an accurate general description of the controlled chaos of an SPL burp in a finely tuned rig? [/QUOTE]

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