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Low Earth Orbit
DIY Audio
New DIY Mid High (90deg) - AKA PM90
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<blockquote data-quote="Stef Smits" data-source="post: 215785" data-attributes="member: 11637"><p>Getting the portlength right in practise is not that easy because to my knowledge, not one simulation program can design for example a shelved port right. You will end up with a correction that needs to be done in practise, hence the multiple versions.</p><p></p><p>-I would say truck pack dimesions are pretty allright for the KS28. Four a side give 226cm or three on carts give 210cm (without covers).</p><p>Most of the times, KS28 will be used in large venues. rolling carts with three stacked makes placement very easy. </p><p></p><p>-With drivers like the one used in the KS28 (something like the B&C 18SWX100) you will need large vents (without L vents around 0,5 times Sd) to counter noise and portlosses as much as possible. This gives the problem that you need long ports which need to fit in a certain box size (with al problems that come extra with long ports). L-vents/curved/laminar do counter this problem with better airflow and smaller portarea, which then again gives a shorter port.</p><p></p><p>-I would say the chamber volume is even smaller then 350L for both drivers. And I would say thats even small for the used drivers.</p><p></p><p>-The low tuning can give extra dimensions to the sound experience with the proper source material. Some interesting AES papers are written about that.</p><p></p><p>-I do know the B22/B2 and can appreciate the sound, but they still are a 'one-note wonder'. Did not hear the newer SL, but traingle ports are factual more compromised due to the losses involved.</p><p></p><p>-SCP series of Coda are cool, but heard they are not as loud as most dual 18's.</p></blockquote><p></p>
[QUOTE="Stef Smits, post: 215785, member: 11637"] Getting the portlength right in practise is not that easy because to my knowledge, not one simulation program can design for example a shelved port right. You will end up with a correction that needs to be done in practise, hence the multiple versions. -I would say truck pack dimesions are pretty allright for the KS28. Four a side give 226cm or three on carts give 210cm (without covers). Most of the times, KS28 will be used in large venues. rolling carts with three stacked makes placement very easy. -With drivers like the one used in the KS28 (something like the B&C 18SWX100) you will need large vents (without L vents around 0,5 times Sd) to counter noise and portlosses as much as possible. This gives the problem that you need long ports which need to fit in a certain box size (with al problems that come extra with long ports). L-vents/curved/laminar do counter this problem with better airflow and smaller portarea, which then again gives a shorter port. -I would say the chamber volume is even smaller then 350L for both drivers. And I would say thats even small for the used drivers. -The low tuning can give extra dimensions to the sound experience with the proper source material. Some interesting AES papers are written about that. -I do know the B22/B2 and can appreciate the sound, but they still are a 'one-note wonder'. Did not hear the newer SL, but traingle ports are factual more compromised due to the losses involved. -SCP series of Coda are cool, but heard they are not as loud as most dual 18's. [/QUOTE]
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New DIY Mid High (90deg) - AKA PM90
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