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Message: <blockquote data-quote="Yong_5290" data-source="post: 350825" data-attributes="member: 6425"> <table style='width: 100%'><tr><td> reason for using sealed box is not because you can run away with small box. Not many subs can give more bottom end in 1 cu.ft or less sealed box. Most ppl will end up having Qtc of 0.9 and above which is in boomy zone. Transfer function of the car may help a bit on the low end but the roll off is early. You want the sub-woofer to play sub-bass well into the low region at reasonable SPL level. But somehow ppl like the boomy bass ..... maybe they have yet to listen to sub-bass down low... B) one thing if you want small box ....... get a sub which can play low in small box and plenty of power due to efficiency trade off (Hoffman's Iron law). on the small sealed vs. ported box ...... well i fired up WinISD & here's what i got. Shiva in 1 cu.ft sealed will have F3 at roughly 44Hz. Shiva in 1 cu.ft ported box tuned at 26hz will have F3 roughly at 40 Hz. It has the same roll-off slope (approx.) as in that 1 cu.ft sealed box but louder by at least 2dB. well? reason for porting is to extend the freq. lower (as shown above) and the main part is to make it louder. Big ported box with big port area is meant to be loud which is why it is chosen to be done in the first place. You can make small ported box but why bother to do complicated box when what you want is more loudness? [/b]</td></tr></table> </blockquote> <table style='width: 100%'><tr><td> it will b good if u can show us how good is ur ported enclosure performing... tok onli is useless.... y dun join us in TT n show it 2 us :D</td></tr></table> [/QUOTE]

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