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Car Audio Equipment
Subwoofers
Which is louder; 4 sealed subs or 1 ported?
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<blockquote data-quote="T3mpest" data-source="post: 7067485" data-attributes="member: 560148"><p>more coils/cone area IS more effecient inherently. If you keep power equal, but divide it among 2x as many woofers you GAIN 3dbs' by doing so, even more if they coils are hot enough to experience significant power compression. For example two type R's on 500 watts is going be 3dbs louder than a single on 1000 watts, assuming all else equal so scale the box and port... You'd need 2000 watts on a single driver to equal SPL, again no compression involved which as we know, isnt' near reality. You only need to move 4x the cone area 1/4 the distance to keep equal SPL. You actually have to use 1/4 the power to get 1/2 teh excursion however, both cases work towards 4 12's sealed being louder, especially if we are concerned about a. how it sounds and more about overall ouput, not just one peak measurement on a meter.</p><p></p><p>There is no magic amount of power that gets a speaker moving. As a matter of fact once you get past a certain point, more power actually STOPS giving you more ouput, or begins to barely add more ouput despite great increases in wattage. doubling power is good for 3dbs, but once you past 1/2 of the speakers RMS, in most cases anyway, you actually gain less.</p></blockquote><p></p>
[QUOTE="T3mpest, post: 7067485, member: 560148"] more coils/cone area IS more effecient inherently. If you keep power equal, but divide it among 2x as many woofers you GAIN 3dbs' by doing so, even more if they coils are hot enough to experience significant power compression. For example two type R's on 500 watts is going be 3dbs louder than a single on 1000 watts, assuming all else equal so scale the box and port... You'd need 2000 watts on a single driver to equal SPL, again no compression involved which as we know, isnt' near reality. You only need to move 4x the cone area 1/4 the distance to keep equal SPL. You actually have to use 1/4 the power to get 1/2 teh excursion however, both cases work towards 4 12's sealed being louder, especially if we are concerned about a. how it sounds and more about overall ouput, not just one peak measurement on a meter. There is no magic amount of power that gets a speaker moving. As a matter of fact once you get past a certain point, more power actually STOPS giving you more ouput, or begins to barely add more ouput despite great increases in wattage. doubling power is good for 3dbs, but once you past 1/2 of the speakers RMS, in most cases anyway, you actually gain less. [/QUOTE]
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Car Audio Equipment
Subwoofers
Which is louder; 4 sealed subs or 1 ported?
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