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  1. DIY Subwoofers - General Discussion
    I think I know the answer to this question but would like more feedback so I can wrap my head around it. I have pair of LMS 5400 Ultra 18" both in 4cuft. sealed enclosures. During modeling with WinISD I saw that they can take 3200 watts each before exceeding x-max at about 10hz. Now if I add...
  2. DIY Subwoofers - General Discussion
    It seems that xmax results in greater overall SPL volume and also lower notes. But from what I can tell efficiency is impacted in that more excursion requires more power. Can anyone clear this up?
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