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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: 137314" data-attributes="member: 652"><p>Re: New DIY Mid High</p><p></p><p>I made a few more measurements-</p><p></p><p>Every thing is more or less +/- 3dB without correction over the operating bandwidth except the top end of the 4594 HF where it starts to drop around 6KHz.</p><p></p><p>4594 on RCF HP950 horn </p><p>- VHF and VHF IIR corrected with 4 x IIR filters</p><p>- HF and HF corrected with 1 x IIR filter</p><p></p><p>12 inch mid compared to sim. I took 5 measurements at different distances from the box and averaged the result. The ground reflection was causing some issues.Its a better result than the previous plot.</p><p></p><p>Note: SPL divisions are 5dB</p></blockquote><p></p>
[QUOTE="Peter Morris, post: 137314, member: 652"] Re: New DIY Mid High I made a few more measurements- Every thing is more or less +/- 3dB without correction over the operating bandwidth except the top end of the 4594 HF where it starts to drop around 6KHz. 4594 on RCF HP950 horn - VHF and VHF IIR corrected with 4 x IIR filters - HF and HF corrected with 1 x IIR filter 12 inch mid compared to sim. I took 5 measurements at different distances from the box and averaged the result. The ground reflection was causing some issues.Its a better result than the previous plot. Note: SPL divisions are 5dB [/QUOTE]
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New DIY Mid High (90deg) - AKA PM90
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