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<blockquote data-quote="Jeffdachef" data-source="post: 8355008" data-attributes="member: 650438">Size and port area plays a big part, too much will play sloppy, not enough will cause turbulence and bad port velocity. Just the right amount, you can have 18s play double bass pedals clean in a ported box easily. Also you need to model your subs out on winisd or any other modeling software. It uses the ts parameters of the sub to model out its performance in transfer function, group delay and spl capabilities. Youll see if your specifiied tuning will give you a heavy low end, flat or peaky response.You determine if your sub works well or poorly in sealed or ported via calculating the efficiency bandwidth product (EBP).Also a bandpass box can also be tuned to have a flat response, it cannot match a sealed in precision but can come close. It depends on the sealed to ported ratio, tuning of the box, port area. All your assumptions are bassed on the garbage pre built bandpass boxes</blockquote>

[QUOTE="Jeffdachef, post: 8355008, member: 650438"] Size and port area plays a big part, too much will play sloppy, not enough will cause turbulence and bad port velocity. Just the right amount, you can have 18s play double bass pedals clean in a ported box easily. Also you need to model your subs out on winisd or any other modeling software. It uses the ts parameters of the sub to model out its performance in transfer function, group delay and spl capabilities. Youll see if your specifiied tuning will give you a heavy low end, flat or peaky response. You determine if your sub works well or poorly in sealed or ported via calculating the efficiency bandwidth product (EBP). Also a bandpass box can also be tuned to have a flat response, it cannot match a sealed in precision but can come close. It depends on the sealed to ported ratio, tuning of the box, port area. All your assumptions are bassed on the garbage pre built bandpass boxes [/QUOTE]

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