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<blockquote data-quote="sexy" data-source="post: 7365377" data-attributes="member: 612355">When you play music under the tuning of the enclosure its not as likely to be real hard on your sub as playing tones for three seconds strait. When you play anything below the tuning of the box you loose back pressure. That pressure helps control the movement of the sub so that it moves in and out the right amount and moves strait not damaging the coils on the sub.If I were running a competition and someone asked me about playing under the tuning of a box I would try to explain all I could to them. You should not need to play under that box tune though. I will explain; most people going to compete with a regular daily driver are going to see that their peak note will be right around 45hz give or take a couple.So the judge was playing it safe with that answer and giving you a chance to learn more about your system. He also probably knows from years of experience (like me) that you will not need to play that low to get your best score. 147.5 is pretty good for someone just learning you should be happy with that.If you get to go again do a sweep from 40hz to 60hz and you will most likely find that your peak is right around 45hz.Another point here is that it was meca and in meca you are allowed to have a door or window open. With a door or window open you have less back pressure inside the car to help control the movement of the sub I forgot to mention that before.</blockquote>

[QUOTE="sexy, post: 7365377, member: 612355"] When you play music under the tuning of the enclosure its not as likely to be real hard on your sub as playing tones for three seconds strait. When you play anything below the tuning of the box you loose back pressure. That pressure helps control the movement of the sub so that it moves in and out the right amount and moves strait not damaging the coils on the sub. If I were running a competition and someone asked me about playing under the tuning of a box I would try to explain all I could to them. You should not need to play under that box tune though. I will explain; most people going to compete with a regular daily driver are going to see that their peak note will be right around 45hz give or take a couple. So the judge was playing it safe with that answer and giving you a chance to learn more about your system. He also probably knows from years of experience (like me) that you will not need to play that low to get your best score. 147.5 is pretty good for someone just learning you should be happy with that. If you get to go again do a sweep from 40hz to 60hz and you will most likely find that your peak is right around 45hz. Another point here is that it was meca and in meca you are allowed to have a door or window open. With a door or window open you have less back pressure inside the car to help control the movement of the sub I forgot to mention that before. [/QUOTE]

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