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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: 137209" data-attributes="member: 652"><p>Re: New DIY Mid High</p><p></p><p></p><p></p><p>Hi Uwe,</p><p></p><p>In my case the costs – 2 x Lake LM26, 3 x Powersoft K6’s and 1 x Powersoft K10 :roll: … anyway I think it could be reduced to 1 x <em>normal</em> IIR 3 way stereo digital crossover and 3 amplifiers. The costs will be a "normal" looking phase response and maybe a little less SPL.</p><p></p><p>There are a few reason why this box was initially 3- way, Lake processed and is using the HE version of the 4594 other than I did have the amps and processing sitting around in a road case. </p><p></p><p>Firstly I wanted to build a <em>"no compromise"</em> design, the ultimate speaker on a stick. I wanted as much sound quality and SPL that I could possibly get out of a box that was small and light enough to be mounted on a standard heavy duty speaker stand. As I only envisaged that this would be a stand-alone box I selected a 90 degree horn, but there is no reason why a 60 degree version could not be built.</p><p></p><p>The 4594HE sounds great but also provides a lot of other advantages. You automatically have a point source for a large portion of the audio spectrum and it’s lighter and smaller than a separate MID + HF driver combination.</p><p></p><p>As I understand (I may be wrong) the HE version is a new addition to the range, but the standard 4594 will work just fine. I don’t see any problem using BMS’s passive crossover. I use this combination in my double 10 and horn. I suspect that I can probably get a bit more SPL running all active before I have any reliability issues. I note that USSpeakers now has the HE version of the 4599 mid driver for sale.</p><p></p><p>The other reason for the all active design, as I said above is that I already had amp racks with Lake processing set up to run my Flex Array, just had to plug the DIY in and write a new program. It’s also easier to use FIR filters and crossovers to achieve what you want compared designing passive crossovers. </p><p></p><p>As I said at the beginning of this threat, this is only a prototype. Next I’m planning to try some all IIR settings and see how well it performs. I have ordered some 18sound XT1464 60 degree horns to try, but it will take 2 or 3 weeks for them to arrive. I have some B&C 12’ drivers (12NDL76) that are a little lighter than the RCF and should work. They will provide a little more space inside the box and allow the XT1460’s to used - yes the clearances are that tight.</p><p></p><p>My initial impression is that it sounds better than the "Meyer stack". The advantage the DIY has is the amount of labour needed to set it up, the size truck you need to deliver it and SPL and coverage you can achieve without have to go to a fully flown line array. That’s mean a lot less expense for the customer, BUT it’s not on anyone’s rider <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite15" alt=":cry:" title="Crying :cry:" loading="lazy" data-shortname=":cry:" />.</p></blockquote><p></p>
[QUOTE="Peter Morris, post: 137209, member: 652"] Re: New DIY Mid High Hi Uwe, In my case the costs – 2 x Lake LM26, 3 x Powersoft K6’s and 1 x Powersoft K10 :roll: … anyway I think it could be reduced to 1 x [I]normal[/I] IIR 3 way stereo digital crossover and 3 amplifiers. The costs will be a "normal" looking phase response and maybe a little less SPL. There are a few reason why this box was initially 3- way, Lake processed and is using the HE version of the 4594 other than I did have the amps and processing sitting around in a road case. Firstly I wanted to build a [I]"no compromise"[/I] design, the ultimate speaker on a stick. I wanted as much sound quality and SPL that I could possibly get out of a box that was small and light enough to be mounted on a standard heavy duty speaker stand. As I only envisaged that this would be a stand-alone box I selected a 90 degree horn, but there is no reason why a 60 degree version could not be built. The 4594HE sounds great but also provides a lot of other advantages. You automatically have a point source for a large portion of the audio spectrum and it’s lighter and smaller than a separate MID + HF driver combination. As I understand (I may be wrong) the HE version is a new addition to the range, but the standard 4594 will work just fine. I don’t see any problem using BMS’s passive crossover. I use this combination in my double 10 and horn. I suspect that I can probably get a bit more SPL running all active before I have any reliability issues. I note that USSpeakers now has the HE version of the 4599 mid driver for sale. The other reason for the all active design, as I said above is that I already had amp racks with Lake processing set up to run my Flex Array, just had to plug the DIY in and write a new program. It’s also easier to use FIR filters and crossovers to achieve what you want compared designing passive crossovers. As I said at the beginning of this threat, this is only a prototype. Next I’m planning to try some all IIR settings and see how well it performs. I have ordered some 18sound XT1464 60 degree horns to try, but it will take 2 or 3 weeks for them to arrive. I have some B&C 12’ drivers (12NDL76) that are a little lighter than the RCF and should work. They will provide a little more space inside the box and allow the XT1460’s to used - yes the clearances are that tight. My initial impression is that it sounds better than the "Meyer stack". The advantage the DIY has is the amount of labour needed to set it up, the size truck you need to deliver it and SPL and coverage you can achieve without have to go to a fully flown line array. That’s mean a lot less expense for the customer, BUT it’s not on anyone’s rider :cry:. [/QUOTE]
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