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Low Earth Orbit
DIY Audio
New DIY Mid High (90deg) - AKA PM90
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<blockquote data-quote="Jack Arnott" data-source="post: 137341" data-attributes="member: 304"><p>Re: New DIY Mid High</p><p></p><p></p><p></p><p>In the BMS coaxial compression drivers, the mids and HF are not in perfect physical alignment. They are offset by less than 1cm, (IIRC), so that if you use the passive crossover, taking into account the phase shift that it creates, there will be summation at the crossover point. It is assumed that if you are going active, you will measure this, and correct for it with a slight bit of delay. </p><p></p><p>The HE version is one that I had made specifically for a client of mine who does high end studio and playback mixing projects, mostly in the LA area. As such, he takes months to design and build the specific speakers for the project, and more than that to rebuild the studio and install the speakers. So I also order these units for myself, and others. As such, BMS has not given me any documentation on these drivers. I am sure that this original client and Peter have the most documentation available. Other clients have bought them based only on their ears. </p><p></p><p>I cannot sell outside of my distributorship, North America, or where there is no distributor, but you can purchase them from US Speaker, your distributor, if they will custom order them, or (I found out this morning upon an overnight inquiry) (during which time my first reply to this disappeared and I am trying to re-creat it) you can get this item directly from BMS. Contact me and I will give you the person and email to contact. I sell in quantities as low as one. </p><p></p><p>An interesting, to me, side note. Even though the frequency at which the full fruition phase plug is fixing a problem is out of my hearing range now, with the right source and situation, I can still tell the difference between the two. </p><p></p><p></p><p></p><p>Yes, and he actually sold one last week. Which usually means a DIYer sampling.</p></blockquote><p></p>
[QUOTE="Jack Arnott, post: 137341, member: 304"] Re: New DIY Mid High In the BMS coaxial compression drivers, the mids and HF are not in perfect physical alignment. They are offset by less than 1cm, (IIRC), so that if you use the passive crossover, taking into account the phase shift that it creates, there will be summation at the crossover point. It is assumed that if you are going active, you will measure this, and correct for it with a slight bit of delay. The HE version is one that I had made specifically for a client of mine who does high end studio and playback mixing projects, mostly in the LA area. As such, he takes months to design and build the specific speakers for the project, and more than that to rebuild the studio and install the speakers. So I also order these units for myself, and others. As such, BMS has not given me any documentation on these drivers. I am sure that this original client and Peter have the most documentation available. Other clients have bought them based only on their ears. I cannot sell outside of my distributorship, North America, or where there is no distributor, but you can purchase them from US Speaker, your distributor, if they will custom order them, or (I found out this morning upon an overnight inquiry) (during which time my first reply to this disappeared and I am trying to re-creat it) you can get this item directly from BMS. Contact me and I will give you the person and email to contact. I sell in quantities as low as one. An interesting, to me, side note. Even though the frequency at which the full fruition phase plug is fixing a problem is out of my hearing range now, with the right source and situation, I can still tell the difference between the two. Yes, and he actually sold one last week. Which usually means a DIYer sampling. [/QUOTE]
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