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<blockquote data-quote="audioholic" data-source="post: 2165066" data-attributes="member: 549629">*sigh* Not this discussion again.Sealed boxes give you a flatter, more natural response curve. Vented designs give unnatural spikes in output across the frequency spectrum (not a flat response). This is the main reason to chose sealed over vented for SQ applications (phasing is another reason).JL Audio and I disagree on their wording. I know where they are coming from though: vented systems control cone motion more, so less cone motion = less distortion. In very simplistic terms, thats true. But for a given excursion level, vented enclosures (single reflex and dual reflex) do not output less distortion. Also, distoriton is a bit harder to hear in vented designs (especially bandpass). JL&#039;s wording is very misleading. For example, a bandpass enclosure is very good at masking distortion noises the speaker may be making. On the surface that seems like a good thing (as JL&#039;s wording implies), but it also leads to problems. You can be doing great harm to your speaker(s) and not even realize it with a bandpass.... the sub&#039;s in there banging away and all you hear is that boom-boom-boom one note wonder. The sub&#039;s in there stressing, and the box is making a single note sound that&#039;s overpowering the rest of the system, but hey JL Audio says its less distortion than a sealed system would be... must be true SQ there right?&quot;Distortion&quot; can be described many different way. There&#039;s signal distortion, speaker distortion, and there&#039;s sound wave distortion. Disrupting any of those three ultimately &#039;distorts&#039; the final sound. *shrug*</blockquote>

[QUOTE="audioholic, post: 2165066, member: 549629"] *sigh* Not this discussion again. Sealed boxes give you a flatter, more natural response curve. Vented designs give unnatural spikes in output across the frequency spectrum (not a flat response). This is the main reason to chose sealed over vented for SQ applications (phasing is another reason). JL Audio and I disagree on their wording. I know where they are coming from though: vented systems control cone motion more, so less cone motion = less distortion. In very simplistic terms, thats true. But for a given excursion level, vented enclosures (single reflex and dual reflex) do not output less distortion. Also, distoriton is a bit harder to hear in vented designs (especially bandpass). JL's wording is very misleading. For example, a bandpass enclosure is very good at masking distortion noises the speaker may be making. On the surface that seems like a good thing (as JL's wording implies), but it also leads to problems. You can be doing great harm to your speaker(s) and not even realize it with a bandpass.... the sub's in there banging away and all you hear is that boom-boom-boom one note wonder. The sub's in there stressing, and the box is making a single note sound that's overpowering the rest of the system, but hey JL Audio says its less distortion than a sealed system would be... must be true SQ there right? "Distortion" can be described many different way. There's signal distortion, speaker distortion, and there's sound wave distortion. Disrupting any of those three ultimately 'distorts' the final sound. *shrug* [/QUOTE]

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