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Single 18" LF Box vs Double
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<blockquote data-quote="Silas Pradetto" data-source="post: 51764" data-attributes="member: 34"><p>Re: Single 18" LF Box vs Double</p><p></p><ol> <li data-xf-list-type="ol">Watts don't mean anything. If you're specifying multiple boxes to get to a target SPL, you should be looking at that, not watts.</li> <li data-xf-list-type="ol">Two single 18s vs a double 18 will have exactly the same output if the double box is exactly double - double the volume, double the port area, and double the watts (read: the same input voltage).</li> <li data-xf-list-type="ol">From speaking with people that know more than me, like Phil Graham, one of the most important aspects of subwoofer design is the port area. Closely consider this in your calculation; it can be far more detrimental than the specs on paper.</li> <li data-xf-list-type="ol">There is no 'coupling' either. When two identical speakers are used together and their outputs sum 100% constructively, there is a 6dB increase in output. This comes from 3dB as a sensitivity increase (twice as much cone) and 3dB from the power handling increase (double the power is now extracted per an input voltage). I think most people think that there is magic coupling when subs are used together because this guarantees the outputs to be 100% combined constructively. Using subs separate will yield the exact same output, but only where the outputs of both sub stacks are combining 100% constructively - which only happens in the 'power ally'. </li> </ol></blockquote><p></p>
[QUOTE="Silas Pradetto, post: 51764, member: 34"] Re: Single 18" LF Box vs Double [LIST=1] [*]Watts don't mean anything. If you're specifying multiple boxes to get to a target SPL, you should be looking at that, not watts. [*]Two single 18s vs a double 18 will have exactly the same output if the double box is exactly double - double the volume, double the port area, and double the watts (read: the same input voltage). [*]From speaking with people that know more than me, like Phil Graham, one of the most important aspects of subwoofer design is the port area. Closely consider this in your calculation; it can be far more detrimental than the specs on paper. [*]There is no 'coupling' either. When two identical speakers are used together and their outputs sum 100% constructively, there is a 6dB increase in output. This comes from 3dB as a sensitivity increase (twice as much cone) and 3dB from the power handling increase (double the power is now extracted per an input voltage). I think most people think that there is magic coupling when subs are used together because this guarantees the outputs to be 100% combined constructively. Using subs separate will yield the exact same output, but only where the outputs of both sub stacks are combining 100% constructively - which only happens in the 'power ally'. [/LIST] [/QUOTE]
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Single 18" LF Box vs Double
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