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<blockquote data-quote="audioholic" data-source="post: 5112625" data-attributes="member: 549629">That is a common mistake. You need to remember, how a speaker produces a 60hz sound is by the cone making 60 cycles a second. An 80 hz note requires 80 cycles per second. So the &#039;speed&#039; of each speaker&#039;s cone motion is the same, or they wouldn&#039;t be playing the same note anymore. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gifGenerally the cancellation spoke of when saying not to mix ported and sealed is when you have two different systems playing the same frequency band, but each is displaying a different frequency response (ported will have a peak in output near tuning, sealed will roll off shallower than ported below tuning, etc). When 2 different systems with different responses try to play the same band, they dont reinforce each other properly. Normally 2 drivers playing the same frequencies, in the same enclosure types/sizes/alignments, will reinforce each other uniformly. But with the two unlike systems, at some points in the freq spectrum you will get reinforcement, and in some places you will get cancellation. This leads to erratic over all frequency response of both systems mated together. Erratic response is exactly what you dont want.So yes, adding more subs, even when different types, sizes, or in different enclosures, will make it over all sound louder to your ear. But if you really sat down and listened critically, you would hear response problems (assuming your ears are trained to recognize the cues). This is also another common mistake or argument people use, that adding more subs obviiously makes it louder so that&#039;s beneficial. But few people think about what it does to actual frequency response.Sorry, I actually tried to keep it short.</blockquote>

[QUOTE="audioholic, post: 5112625, member: 549629"] That is a common mistake. You need to remember, how a speaker produces a 60hz sound is by the cone making 60 cycles a second. An 80 hz note requires 80 cycles per second. So the 'speed' of each speaker's cone motion is the same, or they wouldn't be playing the same note anymore. [IMG]//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif[/IMG] Generally the cancellation spoke of when saying not to mix ported and sealed is when you have two different systems playing the same frequency band, but each is displaying a different frequency response (ported will have a peak in output near tuning, sealed will roll off shallower than ported below tuning, etc). When 2 different systems with different responses try to play the same band, they dont reinforce each other properly. Normally 2 drivers playing the same frequencies, in the same enclosure types/sizes/alignments, will reinforce each other uniformly. But with the two unlike systems, at some points in the freq spectrum you will get reinforcement, and in some places you will get cancellation. This leads to erratic over all frequency response of both systems mated together. Erratic response is exactly what you dont want. So yes, adding more subs, even when different types, sizes, or in different enclosures, will make it over all sound louder to your ear. But if you really sat down and listened critically, you would hear response problems (assuming your ears are trained to recognize the cues). This is also another common mistake or argument people use, that adding more subs obviiously makes it louder so that's beneficial. But few people think about what it does to actual frequency response. Sorry, I actually tried to keep it short. [/QUOTE]

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