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<blockquote data-quote="audioholic" data-source="post: 2440747" data-attributes="member: 549629">Actually, what you&#039;ve read is that it makes almost no difference in audible terms. You have not read it makes no difference in enclosure volume specs, because it does. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif Clealry, when you take your sub out and mount it inverted, you are removing it from the enclosure volume, hence gaining some interior volume. There is simply no disputing this. Now, is it enough to be audible? Most likely not. But, add that to the space gained by removing the ports (and mounting them outside) and you are starting to talk about a decent amount of volume being added to the enclosure. Will those two factors combine to make an audible difference. IMO, yes, if he listens for it. Thos two things will probably yield not a heck of alot less gain in enclosure space than the .5 cubes he was wanting to rebuild for at the beginning of this thread.The push-pull configuration you are referring to is called isobarik. If you want to try it, be my guest, but you wont like the results. Twice the speakers, twice the money, for the same output as only one of the speakers.... for what&#039;s usually an inaudible improvement in distortion output. Yaay? Not. And to correctly isobarik mount two subs, there is more to it than simply having one push in on one side of the box while the other pulls outward from the other side. The further the gap between the two subs, the less efficient the isobarik phenomenon would be. Ive done it, Ive know people who have also... has always turned out to be more money, work and hassle than its worth.</blockquote>

[QUOTE="audioholic, post: 2440747, member: 549629"] Actually, what you've read is that it makes almost no difference in audible terms. You have not read it makes no difference in enclosure volume specs, because it does. [IMG]//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif[/IMG] Clealry, when you take your sub out and mount it inverted, you are removing it from the enclosure volume, hence gaining some interior volume. There is simply no disputing this. Now, is it enough to be audible? Most likely not. But, add that to the space gained by removing the ports (and mounting them outside) and you are starting to talk about a decent amount of volume being added to the enclosure. Will those two factors combine to make an audible difference. IMO, yes, if he listens for it. Thos two things will probably yield not a heck of alot less gain in enclosure space than the .5 cubes he was wanting to rebuild for at the beginning of this thread. The push-pull configuration you are referring to is called isobarik. If you want to try it, be my guest, but you wont like the results. Twice the speakers, twice the money, for the same output as only one of the speakers.... for what's usually an inaudible improvement in distortion output. Yaay? Not. And to correctly isobarik mount two subs, there is more to it than simply having one push in on one side of the box while the other pulls outward from the other side. The further the gap between the two subs, the less efficient the isobarik phenomenon would be. Ive done it, Ive know people who have also... has always turned out to be more money, work and hassle than its worth. [/QUOTE]

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