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Speaker Asylum General speaker questions for audio and home theater. |
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Speaker Asylum General speaker questions for audio and home theater. |
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In Reply to: Sealed vs. Ported speakers in medium sized room. posted by carcass93 on December 15, 2006 at 07:16:49:
One possible advantage of a ported system is that you can very significantly alter the shape of the response curve at low frequencies by changing the port tuning. While this isn't a built-in feature with most speakers, it's still usually possible to lower the tuning frequency, which is the way you want to go to tighten up the bass. Lowering the tuning frequency will raise the -3 dB point but lower the -6 dB point.I will concede that sealed has many theoretical advantages, but the woofers I think sound best are much better suited for ported enclosures.
Ported speakers naturally have a 4th order rolloff below system resonance, so it will be hard to get a good blend with a subwoofer that incorporates a 2nd order lowpass filter. You need to use a subwoofer with a 4th order lowpass crossover filter, which unfortunately is much less common than the less expensive 2nd order filter found in most commercial subwoofers (most subwoofers sales are based on loudest-deepest-cheapest-in-smallest-possible-box, and the crossover isn't a major selling point). On the othe had, if your main speakers are sealed, then a sub with a 2nd order low pass filter will work just fine.
So I don't think that using a ported speaker eliminates the subwoofer option, but I do think that more commercially available subwoofers are likely to blend well with the sealed-box speaker.
Duke
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Follow Ups
- Re: Sealed vs. Ported speakers in medium sized room. - Duke 17:00:32 12/15/06 (2)
- Sub's crossover order - carcass93 17:38:11 12/15/06 (0)
- edit - Duke 17:02:55 12/15/06 (0)
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