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Low Earth Orbit
DIY Audio
New DIY Mid High (90deg) - AKA PM90
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<blockquote data-quote="Peter Morris" data-source="post: 133254" data-attributes="member: 652"><p>Re: New DIY Mid High</p><p></p><p></p><p></p><p>Hi Josh,</p><p></p><p>Great website! </p><p></p><p>FWIW below are a couple of different alignments for the 21SW152. The white traces are in 280L box tuned at 25,30,35 & 40Hz. The red is what B&C suggests - 190L @ 33Hz. At the 25Hz tuning you have ended up with there is only a small ripple, the problem really starts when its tuned above 30Hz, which is what I expect Marjan heard.</p><p></p><p>Did you ever do a waterfall plot of the 21SW152 ... I would also love to see some waterfall plots and impulse response of some more tapped horns.</p><p></p><p>(I selected my best guess for QL, Qa & Qp to match your design, a Vc temp rise of 30 degrees and 2000 watts input)</p></blockquote><p></p>
[QUOTE="Peter Morris, post: 133254, member: 652"] Re: New DIY Mid High Hi Josh, Great website! FWIW below are a couple of different alignments for the 21SW152. The white traces are in 280L box tuned at 25,30,35 & 40Hz. The red is what B&C suggests - 190L @ 33Hz. At the 25Hz tuning you have ended up with there is only a small ripple, the problem really starts when its tuned above 30Hz, which is what I expect Marjan heard. Did you ever do a waterfall plot of the 21SW152 ... I would also love to see some waterfall plots and impulse response of some more tapped horns. (I selected my best guess for QL, Qa & Qp to match your design, a Vc temp rise of 30 degrees and 2000 watts input) [/QUOTE]
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New DIY Mid High (90deg) - AKA PM90
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