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<blockquote data-quote="Peter Morris" data-source="post: 138066" data-attributes="member: 652">Re: New DIY Mid HighHere is a picture of a couple of horns I have compared to the RCF 950 - The 18sound XT1460 and a 90 degree proprietary horn designed by a friend.Unfortunately I can&#039;t&nbsp; seem to find&nbsp; some of the plots I made.In short the XT1460 is almost 3 dB more efficient over the operating band especially down around 600 Hz when compared to the 90 degree RCF 950.&nbsp; The proprietary horn has similar efficiency above 1KHz to the 950, but it is 3 to 4 dB more efficient around 600 Hz.&nbsp; Its bigger and longer, and a little large for the DIY unfortunately :-(.&nbsp; The plots are comparing the raw response of a 4594HE with an 18sound NSD1480N - both on the XT1480.<a href="http://www.eighteensound.it/PRODUCTS/Products/CatID/3/ProdID=151#.VO8MonyUfHU" target="_blank">http://www.eighteensound.it/PRODUCTS/Products/CatID/3/ProdID=151#.VO8MonyUfHU</a>I did two plots to compare the Mid and HF of the NSD1480N to the raw 4594HE plot (orange). I have used 1 octave smoothing to make the efficiencies easier to compare. The 4594 is about 2.5 dB more efficient between 700 Hz and 4.0 Khz, and as you can see its more like 10 - 16 dB above 10 KHz.In total the 4594 will take about 3 dB more power than the 1480.</blockquote>

[QUOTE="Peter Morris, post: 138066, member: 652"] Re: New DIY Mid High Here is a picture of a couple of horns I have compared to the RCF 950 - The 18sound XT1460 and a 90 degree proprietary horn designed by a friend. Unfortunately I can't seem to find some of the plots I made. In short the XT1460 is almost 3 dB more efficient over the operating band especially down around 600 Hz when compared to the 90 degree RCF 950. The proprietary horn has similar efficiency above 1KHz to the 950, but it is 3 to 4 dB more efficient around 600 Hz. Its bigger and longer, and a little large for the DIY unfortunately :-(. The plots are comparing the raw response of a 4594HE with an 18sound NSD1480N - both on the XT1480. [URL]http://www.eighteensound.it/PRODUCTS/Products/CatID/3/ProdID=151#.VO8MonyUfHU[/URL] I did two plots to compare the Mid and HF of the NSD1480N to the raw 4594HE plot (orange). I have used 1 octave smoothing to make the efficiencies easier to compare. The 4594 is about 2.5 dB more efficient between 700 Hz and 4.0 Khz, and as you can see its more like 10 - 16 dB above 10 KHz. In total the 4594 will take about 3 dB more power than the 1480. [/QUOTE]

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