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<blockquote data-quote="Peter Morris" data-source="post: 212596" data-attributes="member: 652">By turning it on it side I assumed you would be rotating the horn - sooo at the crossover of (say) 630Hz you have 3 sources of sound and the directivity is determined by the width/spacing of these three sources. As the frequency increases the pattern will tend to that of the horn and as it decreases it will tend towards the pattern created by the dipole of the 10&quot; or 12&quot; drivers.For a horn the size of the HF950 as you approach the cut off frequency of 400Hz the pattern becomes very wide, much wider than 90 degrees and tends to be controlled by the width of the horn not the angle of the horn walls at these frequencies.Have a look at this horn, the 60 degree horn used in the PM60 ... its 100 degrees at 600Hz <a href="http://www.eighteensound.com/en/products/horn/1-4/0/XT1464.pdf" target="_blank">http://www.eighteensound.com/en/products/horn/1-4/0/XT1464.pdf</a>Getting it all to work together is a lot more compliacted than just selecting nice components. <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile&nbsp; &nbsp; :)"&nbsp; data-smilie="1"data-shortname=":)" />I suspect the 12NW530 is a very nice speaker but I have never used any.</blockquote>

[QUOTE="Peter Morris, post: 212596, member: 652"] By turning it on it side I assumed you would be rotating the horn - sooo at the crossover of (say) 630Hz you have 3 sources of sound and the directivity is determined by the width/spacing of these three sources. As the frequency increases the pattern will tend to that of the horn and as it decreases it will tend towards the pattern created by the dipole of the 10" or 12" drivers. For a horn the size of the HF950 as you approach the cut off frequency of 400Hz the pattern becomes very wide, much wider than 90 degrees and tends to be controlled by the width of the horn not the angle of the horn walls at these frequencies. Have a look at this horn, the 60 degree horn used in the PM60 ... its 100 degrees at 600Hz [URL]http://www.eighteensound.com/en/products/horn/1-4/0/XT1464.pdf[/URL] Getting it all to work together is a lot more compliacted than just selecting nice components. :) I suspect the 12NW530 is a very nice speaker but I have never used any. [/QUOTE]

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