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Infinite Baffle efficiency clarification.
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<blockquote data-quote="soydeedo" data-source="post: 3714805" data-attributes="member: 574991"><p>Well I tried my best to search beforehand, but since most people just say IB it's not the easiest subject to research on here so please take it easy on me if it's hidden in some thread 13 pages back or something. =)</p><p></p><p><strong><span style="color: Red">If you don't want to read the backstory, etc just skip to the bold question at the bottom instead of skipping the whole thread. Thanks.</span></strong></p><p></p><p>Ok so the general rules of thumb that I've seen repeated over and over that pertain to my question are:</p><p></p><p>1) IB setups in trunks act somewhat like very large sealed boxes so they are more efficient and require much less power to get moving.</p><p></p><p>2) An IB setup will never get as loud as the same woofer in a regular sealed or ported box.</p><p></p><p>Alright with that out of the way let's get on with it. I have a 2002 civic with a weak 70a alternator so I'm looking for efficiency, and I'd like some more output than what I've got now. Right now I'm running 2 IDQ.v1 12's in a sealed box so I know I can throw out ~650w to my sub channel without significant voltage drop.</p><p></p><p>Now I know I can port them, but I don't want to take up 4cu ft net, probably 5cu ft gross [remember these are v1]. So I was thinking I could get some new drivers, go with a Trunk Baffle setup, save a boatload of space, and come out with some more output on the same amount of power.</p><p></p><p>My reasoning is this: a hypothetical driver can take 1000w sealed and put out x db. Ported will be x+3 db or so. IB/TB will be something like x-3 db, but only requires maybe 300w. Since that x-3 db is only a little less than that of a 1000w sealed driver it is still probably louder than one of my ~300w sealed IDQ.v1's, no? Is this reasoning correct? That's my whole question. Yes I know a lot depends on which driver I select as well, but say I went with IDMax's, Mag's, or hell even IDQ.v2 15's.</p><p></p><p><strong>I guess a more concise question would be whether an IB/TB setup with its significantly lower power requirements would have only slightly less output than a fully powered sealed box or would the output difference be pretty large?</strong> For reference slightly would be something like going from ported to sealed and large would be like halving the power to a boxed sub. I'm pretty sure it'd be noticeable but only slightly, but I need to make sure. I can probably take it from there.</p><p></p><p>Thanks for reading. =)</p></blockquote><p></p>
[QUOTE="soydeedo, post: 3714805, member: 574991"] Well I tried my best to search beforehand, but since most people just say IB it's not the easiest subject to research on here so please take it easy on me if it's hidden in some thread 13 pages back or something. =) [B][COLOR=Red]If you don't want to read the backstory, etc just skip to the bold question at the bottom instead of skipping the whole thread. Thanks.[/COLOR][/B] Ok so the general rules of thumb that I've seen repeated over and over that pertain to my question are: 1) IB setups in trunks act somewhat like very large sealed boxes so they are more efficient and require much less power to get moving. 2) An IB setup will never get as loud as the same woofer in a regular sealed or ported box. Alright with that out of the way let's get on with it. I have a 2002 civic with a weak 70a alternator so I'm looking for efficiency, and I'd like some more output than what I've got now. Right now I'm running 2 IDQ.v1 12's in a sealed box so I know I can throw out ~650w to my sub channel without significant voltage drop. Now I know I can port them, but I don't want to take up 4cu ft net, probably 5cu ft gross [remember these are v1]. So I was thinking I could get some new drivers, go with a Trunk Baffle setup, save a boatload of space, and come out with some more output on the same amount of power. My reasoning is this: a hypothetical driver can take 1000w sealed and put out x db. Ported will be x+3 db or so. IB/TB will be something like x-3 db, but only requires maybe 300w. Since that x-3 db is only a little less than that of a 1000w sealed driver it is still probably louder than one of my ~300w sealed IDQ.v1's, no? Is this reasoning correct? That's my whole question. Yes I know a lot depends on which driver I select as well, but say I went with IDMax's, Mag's, or hell even IDQ.v2 15's. [B]I guess a more concise question would be whether an IB/TB setup with its significantly lower power requirements would have only slightly less output than a fully powered sealed box or would the output difference be pretty large?[/B] For reference slightly would be something like going from ported to sealed and large would be like halving the power to a boxed sub. I'm pretty sure it'd be noticeable but only slightly, but I need to make sure. I can probably take it from there. Thanks for reading. =) [/QUOTE]
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