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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: 208344" data-attributes="member: 652"><p>Hi.</p><p></p><p>The PM90/60 was designed to produce the most SPL and sound quality possible for a pole mounted speaker. It was designed to go down to 100 Hz so that it could be flown and not sound like there was a gap between the tops and a ground stack sub. Getting good output down to 100 Hz and keeping the size and weight down is the tricky bit.</p><p></p><p>In your application I would probably use something else. The PM90/60 does not have flat raw frequency response and is designed to be run with DSP processing. The mid horn is bent so there is a limit to how high it can be crossed over. As a result the HF driver has to work quite hard. This was the reason for selecting the BMS 4594 – it is designed to go low.</p><p></p><p>This design cannot be built with one driver. If you only need to go from 200-250Hz up you can use a "straight" horn and cross over to the HF driver at a higher frequency. This gives you a lot more cost effective options when selecting a HF driver, I would check out B&C’s new DE1090TN.</p></blockquote><p></p>
[QUOTE="Peter Morris, post: 208344, member: 652"] Hi. The PM90/60 was designed to produce the most SPL and sound quality possible for a pole mounted speaker. It was designed to go down to 100 Hz so that it could be flown and not sound like there was a gap between the tops and a ground stack sub. Getting good output down to 100 Hz and keeping the size and weight down is the tricky bit. In your application I would probably use something else. The PM90/60 does not have flat raw frequency response and is designed to be run with DSP processing. The mid horn is bent so there is a limit to how high it can be crossed over. As a result the HF driver has to work quite hard. This was the reason for selecting the BMS 4594 – it is designed to go low. This design cannot be built with one driver. If you only need to go from 200-250Hz up you can use a "straight" horn and cross over to the HF driver at a higher frequency. This gives you a lot more cost effective options when selecting a HF driver, I would check out B&C’s new DE1090TN. [/QUOTE]
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New DIY Mid High (90deg) - AKA PM90
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