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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: 132511" data-attributes="member: 652"><p>Re: New DIY Mid High</p><p></p><p></p><p></p><p>I used a BMS 4594HE with an RCF HF950 horn and 2 x RCF MB12N351s. You could use the MB12N405 for a bit more power but it makes the box a bit heavier than I wanted. The 12's are on a folded or bent and ported horn about 2ft (600mm) long.</p><p></p><p>The HF950 horn flare has a 400Hz cut off frequency and a 300 x 300mm mouth. The mid horn(s) exit above and below the HF so that the spacing will provide some directivity control just as it does with your Flex array but in the vertical plan. The dual diaphragm concentric compression driver can easily operate down to this frequency. </p><p></p><p>Think in terms of the Flex Array in point source mode with a 90 x 50 horn pattern, using a similar HF / VHF combination and crossover frequencies, and two fully horn loaded 12" drivers instead of the 10's.</p><p></p><p>"How does it sound?" - It sounds like the best studio monitor you have ever heard. The vocal are so clear and it goes loud. Everyone that has heard it comments about the clarity and that they can hear things in their favorite music they have never heard before. </p><p></p><p>Processing is Lake FIR. I don't think you need to use the lake, but it won't be able to make a square wave without it. I did the square wave just to see if I could ... and it will do a resonable square wave from 300Hz to 3kHz.</p><p></p><p>When I have a moment I will post some pictures and some hornresp sims which I have compared it to an EAW KF850 - the idea was the output of an EAW KF850 but with a speaker on a stick. It needed to be a useful size and weight and look good.</p><p></p><p>At this stage the plots are just the prototype, but I thought some people may be interested.</p></blockquote><p></p>
[QUOTE="Peter Morris, post: 132511, member: 652"] Re: New DIY Mid High I used a BMS 4594HE with an RCF HF950 horn and 2 x RCF MB12N351s. You could use the MB12N405 for a bit more power but it makes the box a bit heavier than I wanted. The 12's are on a folded or bent and ported horn about 2ft (600mm) long. The HF950 horn flare has a 400Hz cut off frequency and a 300 x 300mm mouth. The mid horn(s) exit above and below the HF so that the spacing will provide some directivity control just as it does with your Flex array but in the vertical plan. The dual diaphragm concentric compression driver can easily operate down to this frequency. Think in terms of the Flex Array in point source mode with a 90 x 50 horn pattern, using a similar HF / VHF combination and crossover frequencies, and two fully horn loaded 12" drivers instead of the 10's. "How does it sound?" - It sounds like the best studio monitor you have ever heard. The vocal are so clear and it goes loud. Everyone that has heard it comments about the clarity and that they can hear things in their favorite music they have never heard before. Processing is Lake FIR. I don't think you need to use the lake, but it won't be able to make a square wave without it. I did the square wave just to see if I could ... and it will do a resonable square wave from 300Hz to 3kHz. When I have a moment I will post some pictures and some hornresp sims which I have compared it to an EAW KF850 - the idea was the output of an EAW KF850 but with a speaker on a stick. It needed to be a useful size and weight and look good. At this stage the plots are just the prototype, but I thought some people may be interested. [/QUOTE]
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New DIY Mid High (90deg) - AKA PM90
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