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<blockquote data-quote="Based" data-source="post: 8260542" data-attributes="member: 660638">1 18 would be pretty much like having 2 12s in terms of loudness. 4 15s would be like 3 18s pretty much although 3 18s have a LITTLE more cone area but still pretty similar.Google subwoofer cone area chart and if you ever need to know what would be louder, refer to the chart. more cone area means more air that will be moved (typically), and sound is basically squiggly air so more air = more loud. You should also look at the xmax of whatever subs you&#039;re comparing but typically cone area should be the determining factor in what will be louder. Now, regarding exactly how MUCH louder 4 15s would be compared to 1 18, idk how to calculate that. 4 15s have triple the cone area of 1 18 though so you should expect it to be a lot louder lol.You also need to consider if you are giving the subs the power they need, and if your box is made for the subs.</blockquote>

[QUOTE="Based, post: 8260542, member: 660638"] 1 18 would be pretty much like having 2 12s in terms of loudness. 4 15s would be like 3 18s pretty much although 3 18s have a LITTLE more cone area but still pretty similar. Google subwoofer cone area chart and if you ever need to know what would be louder, refer to the chart. more cone area means more air that will be moved (typically), and sound is basically squiggly air so more air = more loud. You should also look at the xmax of whatever subs you're comparing but typically cone area should be the determining factor in what will be louder. Now, regarding exactly how MUCH louder 4 15s would be compared to 1 18, idk how to calculate that. 4 15s have triple the cone area of 1 18 though so you should expect it to be a lot louder lol. You also need to consider if you are giving the subs the power they need, and if your box is made for the subs. [/QUOTE]

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