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DIY For Audio
Help needed - DIY subwoofer build
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<blockquote data-quote="Norval" data-source="post: 704590" data-attributes="member: 62"><p>You need to consider:</p><p>- Room gain</p><p>- Space</p><p>- cone excursion at the wanted power</p><p></p><p>A 300 liter ported tuned to 23 Hz gives you a -3db just above 21Hz. Downside, with room gain of almost 12 db it could sound boomy very easily if not placed properly. Cone excursion higher than smaller boxes.</p><p>A 150 liter ported also tuned to 23 Hz gives a -3db at around 27 Hz, but with a less steep roll-off. In room response should be down to below 20Hz. I think this configuration would be the easiest to deal with in room. But do include a High pass filter to limit cone excursion below resonance.</p><p>A 50 to 100 liter sealed box gives the lowest cone excursion. But response -3 db of just over 40Hz, and -6 at around 30 Hz. Its a small manageable box, easy to place in a room. Good cone excursion, but trade off is you won't get the very low don info. Many prefer this kind of bass though.</p><p></p><p>Personally I would go for a 150 liter ported with a Hi pass filter at 20 Hz.</p></blockquote><p></p>
[QUOTE="Norval, post: 704590, member: 62"] You need to consider: - Room gain - Space - cone excursion at the wanted power A 300 liter ported tuned to 23 Hz gives you a -3db just above 21Hz. Downside, with room gain of almost 12 db it could sound boomy very easily if not placed properly. Cone excursion higher than smaller boxes. A 150 liter ported also tuned to 23 Hz gives a -3db at around 27 Hz, but with a less steep roll-off. In room response should be down to below 20Hz. I think this configuration would be the easiest to deal with in room. But do include a High pass filter to limit cone excursion below resonance. A 50 to 100 liter sealed box gives the lowest cone excursion. But response -3 db of just over 40Hz, and -6 at around 30 Hz. Its a small manageable box, easy to place in a room. Good cone excursion, but trade off is you won't get the very low don info. Many prefer this kind of bass though. Personally I would go for a 150 liter ported with a Hi pass filter at 20 Hz. [/QUOTE]
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DIY & Tutorials
DIY For Audio
Help needed - DIY subwoofer build
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