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<blockquote data-quote="helotaxi" data-source="post: 4509045" data-attributes="member: 550915">The difference between 2 12s on 1500 watts and the one 17&quot; on 750 would be 3dB.&nbsp; If you were to compare the 17 on 750 to a single 12 on 750, the difference would be 3dB with the 17&quot; being louder.&nbsp; With the pair of 12s you have twice the surface area (+3dB) with twice the power (+3dB) compared to the single 12.&nbsp; With the single 17 you only have twice the surface area.&nbsp; The bigger sub is actually going to move more than half as much as the single 12 on the same power because of the non-linear nature of the BL curve and suspension compliance (at higher excursion the motor weakens and drives the cone with less force and the suspension stiffens up as it approaches its limits).&nbsp; The pair of 12s on 750 total would be louder than the single 12 on 750 as well.Remember that this is all theoretical.&nbsp; The pair of 12s would still have an advantage in output and SQ because of power compression.&nbsp; That might be slightly reduced by phase cancellation because of slight variances in the exact specs of the pair of drivers.&nbsp; Also the larger cone of the 17 with 2x the Sd will probably weight more than 2x that of one of the 12s making the difference in efficiency less than 3dB as well.</blockquote>

[QUOTE="helotaxi, post: 4509045, member: 550915"] The difference between 2 12s on 1500 watts and the one 17" on 750 would be 3dB. If you were to compare the 17 on 750 to a single 12 on 750, the difference would be 3dB with the 17" being louder. With the pair of 12s you have twice the surface area (+3dB) with twice the power (+3dB) compared to the single 12. With the single 17 you only have twice the surface area. The bigger sub is actually going to move more than half as much as the single 12 on the same power because of the non-linear nature of the BL curve and suspension compliance (at higher excursion the motor weakens and drives the cone with less force and the suspension stiffens up as it approaches its limits). The pair of 12s on 750 total would be louder than the single 12 on 750 as well. Remember that this is all theoretical. The pair of 12s would still have an advantage in output and SQ because of power compression. That might be slightly reduced by phase cancellation because of slight variances in the exact specs of the pair of drivers. Also the larger cone of the 17 with 2x the Sd will probably weight more than 2x that of one of the 12s making the difference in efficiency less than 3dB as well. [/QUOTE]

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