Because you loose so much output when doing IB. You have to make up for it in cone area. So 2 15's usually sounds like a single 12 in a box in output levels.
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Because you loose so much output when doing IB. You have to make up for it in cone area. So 2 15's usually sounds like a single 12 in a box in output levels.
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Is it worthwhile going IB over say sealed ?
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if you have great mid bass....yes.
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Let say you have great midbasses. .... how are the IB better than say sealed ?
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one of the things I've found that seem to be too simple to be true, is how putting a speaker into an enclosure, essentially trapping the back wave, almost always makes the resulting output have "extra" stuff, in the sound. Now, not getting technical with the basics of decay and enclosure resonance, this "busy-ness" of an enclosed speaker design, just is not a part of open baffle projects, infinite baffle projects.
whether this is important into frequencies where reflection inside a box is irrelevant due to the wave LENGTH, is pretty well debated in audio, from home to car and beyond.
I like to think that we're actually getting "signature" from the design, in how a speaker system develops it's harmonics.
Some speakers ring and what we shouldn't be able to hear, is represented very well in harmonic excitation.
In a car, the fact that each compartment contributes, either negatively or positively, "cannot be neutral, in a zero-sum way," means that adding a sub in box, or on a baffle also means changing the car's internal dimensional data, it's acoustic signature changes. So one cannot really expect to make a sealed sub sound like an IB wall, but it's surprising with today's DSP tools, how close one can get.
And that's what you see, when people try to explain the difference. Some systems can use the extra "clutter" of a box, and some just sound cleaner without a boundary reinforcement in play.
I'm going to say this: IB or Sealed. I like Sealed (always) and sealed enclosures just been good to me score wise. But I have heard two vehicles with IB Image Dynamics IDW15s (accord and Steve head's S10 Blazer) and they sounded really good. So really it will come down to how much room you are willing to sacrifice and what kind of output you want.
Thanks everyone for your input !!!
I'll be posting a re-build log here in the coming weeks....
Another vote for IB. I'm rolling with two large-magnet SBP's in probably less volume of trunk space taken up as a typical box for a small-volume 10" sub.
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