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<blockquote data-quote="d audio 450" data-source="post: 160459" data-attributes="member: 545894">i could be wrong but to my knowledge (notice how i start off every contradicting reply i write with that lol) the size of the sub will not greatly influence volume.&nbsp; The weight and stiffness of the cone directly relate to how fast the sub will go from point A to point B.&nbsp; An 18 will only move more air, not move air harder.&nbsp; Same principle of adding wattage ina stereo setup.&nbsp; if you have 2 50watt speakers and you put 50watts into them, you are not hearing 100watts...you are hearing 50.&nbsp; SPL- the pressure reached in the positive and negative compressions of air have the same absolute value.&nbsp; If that value goes up, the sound becomes louder.&nbsp; The weight of the cone also has alot to do with the response time of the sub itself.&nbsp; The more weight that the coil has to move, the slower response time.&nbsp; (again, i could be wrong).&nbsp; this is why 10&#039;s are commonly called &quot;tighter&quot; than 15&#039;s or 18&#039;s.&nbsp; The inertia from an 18 is greater than the inertia from a 10.&nbsp; (Although a bigger and stronger coil/mag structure can compensate)&nbsp; therefore the response of an 18 COULD be considered &quot;boomy&quot; as opposed to &quot;punchy&quot;.&nbsp; keep in mind though that the density of the magnetic flux( basiclly strength of magnet) in the magnet structure&nbsp; also has a big influence on response time and all.hopefully somone managed to understand my babble- and i helped in some way or another.-pat</blockquote>

[QUOTE="d audio 450, post: 160459, member: 545894"] i could be wrong but to my knowledge (notice how i start off every contradicting reply i write with that lol) the size of the sub will not greatly influence volume. The weight and stiffness of the cone directly relate to how fast the sub will go from point A to point B. An 18 will only move more air, not move air harder. Same principle of adding wattage ina stereo setup. if you have 2 50watt speakers and you put 50watts into them, you are not hearing 100watts...you are hearing 50. SPL- the pressure reached in the positive and negative compressions of air have the same absolute value. If that value goes up, the sound becomes louder. The weight of the cone also has alot to do with the response time of the sub itself. The more weight that the coil has to move, the slower response time. (again, i could be wrong). this is why 10's are commonly called "tighter" than 15's or 18's. The inertia from an 18 is greater than the inertia from a 10. (Although a bigger and stronger coil/mag structure can compensate) therefore the response of an 18 COULD be considered "boomy" as opposed to "punchy". keep in mind though that the density of the magnetic flux( basiclly strength of magnet) in the magnet structure also has a big influence on response time and all. hopefully somone managed to understand my babble- and i helped in some way or another. -pat [/QUOTE]

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