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Little bit different build - Nissan leaf
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<blockquote data-quote="defiance" data-source="post: 7322569" data-attributes="member: 549442"><p>That leviathan is a bit outside my current requirements; it approaches 100A max draw from what I've seen in tests. I know it'll usually draw less in the real world, but for this design I was looking for something under 60A max using that same (less in real world) assumption in order to miminize impact on the range.</p><p></p><p>You're right about the neo speakers - at this point every speaker I've chosen is neo magnet except the rears, and I'm thinking about just leaving the factory speakers (which are also neo magnet), since they'll be unused 95% of the time.</p><p></p><p>I'll look into the bamboo fiberboard you mentioned - haven't heard of it before - but I think I'm probably going to go with fiberglass. I'm betting I can get the enclosure solid but under 25lbs, where even cf or bamboo or other esoteric (expensive) materials would probably put me at 20. I think that's probably getting beyond the point of acceptably diminished returns //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif</p><p></p><p>disturbed- yes, the port is too small according to all the "rule of thumb" guides I've seen. What I'm seeing recommends 90in^2 of port area, where this is more like 50. When I designed it I was using WinISD, and it showed port velocities not over acceptable thresholds; I later saw all the guides showing a larger requirement. When I found that, I considered rebuilding it with the port widened to most of the width of the box and raised an inch (and of course much longer). However, I've run it quite a bit on the bench, and port noise is not really noticeable at all, so I've decided to keep it as is in spite of that "on-paper" weakness. To answer your question, the box is 7 cubes tuned to 29hz.</p></blockquote><p></p>
[QUOTE="defiance, post: 7322569, member: 549442"] That leviathan is a bit outside my current requirements; it approaches 100A max draw from what I've seen in tests. I know it'll usually draw less in the real world, but for this design I was looking for something under 60A max using that same (less in real world) assumption in order to miminize impact on the range. You're right about the neo speakers - at this point every speaker I've chosen is neo magnet except the rears, and I'm thinking about just leaving the factory speakers (which are also neo magnet), since they'll be unused 95% of the time. I'll look into the bamboo fiberboard you mentioned - haven't heard of it before - but I think I'm probably going to go with fiberglass. I'm betting I can get the enclosure solid but under 25lbs, where even cf or bamboo or other esoteric (expensive) materials would probably put me at 20. I think that's probably getting beyond the point of acceptably diminished returns [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] disturbed- yes, the port is too small according to all the "rule of thumb" guides I've seen. What I'm seeing recommends 90in^2 of port area, where this is more like 50. When I designed it I was using WinISD, and it showed port velocities not over acceptable thresholds; I later saw all the guides showing a larger requirement. When I found that, I considered rebuilding it with the port widened to most of the width of the box and raised an inch (and of course much longer). However, I've run it quite a bit on the bench, and port noise is not really noticeable at all, so I've decided to keep it as is in spite of that "on-paper" weakness. To answer your question, the box is 7 cubes tuned to 29hz. [/QUOTE]
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