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Junior Varsity
Casual JTR Noesis and Danley SM80 meet up-also QU24
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<blockquote data-quote="Peter Morris" data-source="post: 130774" data-attributes="member: 652"><p>Re: Casual JTR Noesis and Danley SM80 meet up-also QU24</p><p></p><p></p><p></p><p></p><p><span style="font-size: 12px"><span style="color: #000000"><span style="font-family: 'Calibri'">Absolutely, but ultimately we are judged by “casual listening” - the audience. They don’t care about any of that stuff just so long as it sounds good. In general the two are however directly related.</span></span></span></p><p><span style="font-size: 12px"><span style="color: #000000"><span style="font-family: 'Calibri'"></span></span></span></p><p><span style="font-size: 12px"><span style="color: #000000"><span style="font-family: 'Calibri'">JTRs box was of particular interest to me. About 15 years ago I built a double 10 and horn box very similar to the N3TX for our own use. It was passive / active, pole mountable and had fly points top and bottom. It was slightly smaller than the N3TX. The original version was sealed but to get a bit more LF I changed the design and added some ports.</span></span></span></p><p><span style="font-size: 12px"><span style="color: #000000"><span style="font-family: 'Calibri'"></span></span></span></p><p><span style="font-size: 12px"><span style="color: #000000"><span style="font-family: 'Calibri'">It turn out to be one of the most useful speakers I have ever owned. It was the right size and weight and had lots of horse power and throw. It is still a great box for so many applications.</span></span></span></p><p><span style="font-size: 12px"><span style="color: #000000"><span style="font-family: 'Calibri'"></span></span></span></p><p><span style="font-size: 12px"><span style="color: #000000"><span style="font-family: 'Calibri'">FWIW my latest version uses the BMS 4594ND with an RCF-HF950 horn and some Eighteen Sound 10” drivers. It can be run 2 or 3 way active and is generally used with our double 18” subs. For processing it requires one or two Lab Gruppen Lake – LM26’s.</span></span></span></p><p><span style="font-size: 12px"><span style="color: #000000"><span style="font-family: 'Calibri'"></span></span></span></p><p><span style="font-size: 12px"><span style="color: #000000"><span style="font-family: 'Calibri'">The frequency response is +/- 1.5 db from about 100Hz to 20KHz, the phase response (depending on the processing selected) is flat from about 100Hz to 20KHz and the impulse response is almost perfect. I have included a link to RCF’s spec sheet so you can see some of the polar response plots of the horn.</span></span></span></p><p><a href="http://www.rcf.it/en_US/products/precision-transducers/horns/hf950" target="_blank"><span style="font-family: 'Calibri'"><span style="font-size: 12px"><span style="color: #0000ff">http://www.rcf.it/en_US/products/precision-transducers/horns/hf950</span></span></span></a></p><p><a href="http://www.rcf.it/en_US/products/precision-transducers/horns/hf950" target="_blank"><span style="font-family: 'Calibri'"><span style="font-size: 12px"><span style="color: #0000ff"></span></span></span></a></p><p><span style="font-size: 12px"><span style="color: #000000"><span style="font-family: 'Calibri'">The catch with my design is, it’s very expensive to build and process. If you want the phase response flat from 100Hz you need to allow 12.5ms of FIR process time and you need to use 2 x LM26s … but they do sound great, better than our line arrays </span><span style="font-family: 'Wingdings'"><span style="font-family: 'Wingdings'">J</span></span><span style="font-family: 'Calibri'">. FWIW it can also be processed with one lake or a normal DSP ... anyway ...</span></span></span></p><p></p><p><span style="font-size: 12px"><span style="color: #000000"><span style="font-family: 'Calibri'">I don’t know if it’s possible, and I have been hinting elsewhere … but could you build one of your SBH horns using say 3 x 8” drivers that was +10 degrees – 20 degrees in a similar size and weight box with a passive active option. I don’t live in the US, so your requirements may be different but I think it would be a winner <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 :-)" data-smilie="1"data-shortname=":-)" /></span></span></span></p></blockquote><p></p>
[QUOTE="Peter Morris, post: 130774, member: 652"] Re: Casual JTR Noesis and Danley SM80 meet up-also QU24 [SIZE=3][COLOR=#000000][FONT=Calibri]Absolutely, but ultimately we are judged by “casual listening” - the audience. They don’t care about any of that stuff just so long as it sounds good. In general the two are however directly related. [/FONT][/COLOR][/SIZE] [SIZE=3][COLOR=#000000][FONT=Calibri]JTRs box was of particular interest to me. About 15 years ago I built a double 10 and horn box very similar to the N3TX for our own use. It was passive / active, pole mountable and had fly points top and bottom. It was slightly smaller than the N3TX. The original version was sealed but to get a bit more LF I changed the design and added some ports. [/FONT][/COLOR][/SIZE] [SIZE=3][COLOR=#000000][FONT=Calibri]It turn out to be one of the most useful speakers I have ever owned. It was the right size and weight and had lots of horse power and throw. It is still a great box for so many applications. [/FONT][/COLOR][/SIZE] [SIZE=3][COLOR=#000000][FONT=Calibri]FWIW my latest version uses the BMS 4594ND with an RCF-HF950 horn and some Eighteen Sound 10” drivers. It can be run 2 or 3 way active and is generally used with our double 18” subs. For processing it requires one or two Lab Gruppen Lake – LM26’s. [/FONT][/COLOR][/SIZE] [SIZE=3][COLOR=#000000][FONT=Calibri]The frequency response is +/- 1.5 db from about 100Hz to 20KHz, the phase response (depending on the processing selected) is flat from about 100Hz to 20KHz and the impulse response is almost perfect. I have included a link to RCF’s spec sheet so you can see some of the polar response plots of the horn.[/FONT][/COLOR][/SIZE] [URL="http://www.rcf.it/en_US/products/precision-transducers/horns/hf950"][FONT=Calibri][SIZE=3][COLOR=#0000ff]http://www.rcf.it/en_US/products/precision-transducers/horns/hf950 [/COLOR][/SIZE][/FONT][/URL] [SIZE=3][COLOR=#000000][FONT=Calibri]The catch with my design is, it’s very expensive to build and process. If you want the phase response flat from 100Hz you need to allow 12.5ms of FIR process time and you need to use 2 x LM26s … but they do sound great, better than our line arrays [/FONT][FONT=Wingdings][FONT=Wingdings]J[/FONT][/FONT][FONT=Calibri]. FWIW it can also be processed with one lake or a normal DSP ... anyway ...[/FONT][/COLOR][/SIZE] [SIZE=3][COLOR=#000000][FONT=Calibri]I don’t know if it’s possible, and I have been hinting elsewhere … but could you build one of your SBH horns using say 3 x 8” drivers that was +10 degrees – 20 degrees in a similar size and weight box with a passive active option. I don’t live in the US, so your requirements may be different but I think it would be a winner :-)[/FONT][/COLOR][/SIZE] [/QUOTE]
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