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DIY & Tutorials
DIY For Audio
My First DIY Subwoofer Project! All help and advice welcome!
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<blockquote data-quote="JimGore" data-source="post: 56839" data-attributes="member: 3"><p>The enclosure's internal volume and the tuning frequency "shape" the response at the bottom end of the graph. If you play around with the enclosure size of tuning frequency a bit you will see how it affects the predicted response. </p><p></p><p>* If you keep the tuning frequency constant, the smaller the box becomes, the less deep bass you get.</p><p>* If you keep the box volume constant, the higher the tuning frequency becomes, the more of a bump you will see in the response.</p><p></p><p>I decided on the 200l and 22Hz because of a number of factors:</p><p>1. The response goes down nice and low - you will get way below 20Hz out of these things.</p><p>2. The tuning frequency was chosen to give you a bit of boost centered around about 35Hz because you like "Punchy" bass. These will make you feel like you have been kicked in the chest.</p><p>3. I wanted the cone excursion to be within xmax at 200W RMS power, which this configuration will do with room to spare. Below about 17Hz you will run into excursion problems, but I think the safety margin is good enough, considering that one 15" driver will give you about 112dB at 200W. I doubt you will be able to stand listening to the two of them together pushing 200W into each driver.</p><p></p><p>Hope that helps a bit. Let us know if you have any other questions.</p><p></p><p>Regards,</p><p>Ian.</p></blockquote><p></p>
[QUOTE="JimGore, post: 56839, member: 3"] The enclosure's internal volume and the tuning frequency "shape" the response at the bottom end of the graph. If you play around with the enclosure size of tuning frequency a bit you will see how it affects the predicted response. * If you keep the tuning frequency constant, the smaller the box becomes, the less deep bass you get. * If you keep the box volume constant, the higher the tuning frequency becomes, the more of a bump you will see in the response. I decided on the 200l and 22Hz because of a number of factors: 1. The response goes down nice and low - you will get way below 20Hz out of these things. 2. The tuning frequency was chosen to give you a bit of boost centered around about 35Hz because you like "Punchy" bass. These will make you feel like you have been kicked in the chest. 3. I wanted the cone excursion to be within xmax at 200W RMS power, which this configuration will do with room to spare. Below about 17Hz you will run into excursion problems, but I think the safety margin is good enough, considering that one 15" driver will give you about 112dB at 200W. I doubt you will be able to stand listening to the two of them together pushing 200W into each driver. Hope that helps a bit. Let us know if you have any other questions. Regards, Ian. [/QUOTE]
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DIY & Tutorials
DIY For Audio
My First DIY Subwoofer Project! All help and advice welcome!
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