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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: 138938" data-attributes="member: 652"><p>Re: New DIY Mid High</p><p></p><p></p><p></p><p><span style="font-size: 15px">[SUB]<span style="font-family: 'arial'"><span style="color: #000000">Hi Bennett,</span></span></span></p><p><span style="font-size: 15px"><span style="font-family: 'arial'"><span style="color: #000000"></span></span></span></p><p><span style="font-size: 15px"><span style="font-family: 'arial'"><span style="color: #000000">To get the most out of this design you really need to crossover at 700Hz or less to ensure good directivity, in addition the bent horn struggles to get up to 800Hz. It will work but it’s not optimum. </span></span></span></p><p><span style="font-size: 15px"><span style="font-family: 'arial'"></span></span></p><p><span style="font-size: 15px"><span style="font-family: 'arial'"><span style="color: #000000">The recommended crossover for the 980 is 1200Hz and 1000Hz for the 1080. I looked at the 1080 however there are very few HF horns with a 1.5” entry, and none that I could find had the physical dimensions and cut off frequency needed. There were a lot more 2” entry horns but once again I could not find anything in the appropriate size with a cut of frequency that was low enough and that also had good pattern control.</span></span></span></p><p><span style="font-size: 15px"><span style="font-family: 'arial'"><span style="color: #000000"></span></span></span></p><p><span style="font-size: 15px"><span style="font-family: 'arial'"><span style="color: #000000">If you are going to crossover at 800Hz or more I think another design approach would be better. </span></span></span></p><p><span style="font-size: 15px"><span style="font-family: 'arial'"><span style="color: #000000"></span></span></span></p><p><span style="font-size: 15px"><span style="font-family: 'arial'"><span style="color: #000000">The driver that looked interesting from the B&C in terms of going low and sounding nice was the was the DCX50. </span></span></span></p><p><span style="font-size: 15px"><span style="font-family: 'arial'"></span></span></p><p><span style="font-size: 15px"><span style="font-family: 'arial'"><a href="http://bcspeakers.s3.amazonaws.com/2013/04/30/09/59/06/40/DCX50.pdf" target="_blank"><span style="color: #0000ff">http://bcspeakers.s3.amazonaws.com/2013/04/30/09/59/06/40/DCX50.pdf</span></a></span></span></p><p><span style="font-size: 15px"><span style="font-family: 'arial'"></span></span></p><p><span style="font-size: 15px"><span style="font-family: 'arial'"><span style="color: #000000">Although it’s relatively new it does not look like it was very popular and has been discontinued. It was also only available in 2” and I was not sue about its output capacities (??) </span></span>[/SUB]</span></p></blockquote><p></p>
[QUOTE="Peter Morris, post: 138938, member: 652"] Re: New DIY Mid High [SIZE=4][SUB][FONT=arial][COLOR=#000000]Hi Bennett, [/COLOR] [COLOR=#000000]To get the most out of this design you really need to crossover at 700Hz or less to ensure good directivity, in addition the bent horn struggles to get up to 800Hz. It will work but it’s not optimum. [/COLOR] [COLOR=#000000]The recommended crossover for the 980 is 1200Hz and 1000Hz for the 1080. I looked at the 1080 however there are very few HF horns with a 1.5” entry, and none that I could find had the physical dimensions and cut off frequency needed. There were a lot more 2” entry horns but once again I could not find anything in the appropriate size with a cut of frequency that was low enough and that also had good pattern control. If you are going to crossover at 800Hz or more I think another design approach would be better. [/COLOR] [COLOR=#000000]The driver that looked interesting from the B&C in terms of going low and sounding nice was the was the DCX50. [/COLOR] [URL="http://bcspeakers.s3.amazonaws.com/2013/04/30/09/59/06/40/DCX50.pdf"][COLOR=#0000ff]http://bcspeakers.s3.amazonaws.com/2013/04/30/09/59/06/40/DCX50.pdf[/COLOR][/URL] [COLOR=#000000]Although it’s relatively new it does not look like it was very popular and has been discontinued. It was also only available in 2” and I was not sue about its output capacities (??) [/COLOR][/FONT][/SUB][/SIZE] [/QUOTE]
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