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Low Earth Orbit
DIY Audio
60 Degree DIY Mid Hi - AKA PM60
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<blockquote data-quote="Peter Morris" data-source="post: 211896" data-attributes="member: 652"><p>To me it looks like there are some ideas that MAY have come from the PM90/60, IF they did I'm happy to take it as a compliment <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>The thing that is unique with my design is the amount of SPL and quality you can get out of a speaker on a pole. If it didn’t need to be pole mounted a lot of the design compromises would change, you wouldn’t need a bend the horn, it could be longer and wider at the mouth etc. and you would probably end up with something more like the OHM design that Marjan mentioned.</p><p></p><p>Using Lake processing the PM90/60 can achieve –</p><ul> <li data-xf-list-type="ul">A very flat frequency response from 100Hz up to 18KHz <em>(Note: its difficult to maintain efficiency and get the response to go that low in a small box, operating above 160Hz and achiving efficency in a box of this size is much much easier)</em></li> <li data-xf-list-type="ul">An almost perfect flat phase response over the entire vocal region</li> <li data-xf-list-type="ul">Excellent pattern control for what is a relatively small box</li> <li data-xf-list-type="ul">Stunning impulse response and waterfall plots with every driver operating in its piston range.</li> <li data-xf-list-type="ul">And it will even reproduce a 500Hz square wave on and off both axis - very few speakers can do that.</li> </ul></blockquote><p></p>
[QUOTE="Peter Morris, post: 211896, member: 652"] To me it looks like there are some ideas that MAY have come from the PM90/60, IF they did I'm happy to take it as a compliment :) The thing that is unique with my design is the amount of SPL and quality you can get out of a speaker on a pole. If it didn’t need to be pole mounted a lot of the design compromises would change, you wouldn’t need a bend the horn, it could be longer and wider at the mouth etc. and you would probably end up with something more like the OHM design that Marjan mentioned. Using Lake processing the PM90/60 can achieve – [LIST] [*]A very flat frequency response from 100Hz up to 18KHz [I](Note: its difficult to maintain efficiency and get the response to go that low in a small box, operating above 160Hz and achiving efficency in a box of this size is much much easier)[/I] [*]An almost perfect flat phase response over the entire vocal region [*]Excellent pattern control for what is a relatively small box [*]Stunning impulse response and waterfall plots with every driver operating in its piston range. [*]And it will even reproduce a 500Hz square wave on and off both axis - very few speakers can do that. [/LIST] [/QUOTE]
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60 Degree DIY Mid Hi - AKA PM60
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