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<blockquote data-quote="Peter Morris" data-source="post: 138546" data-attributes="member: 652">Re: New DIY Mid HighIts not easy as a DIY-er to produce accurate sensitivity figures.I did some comparisons with different drivers and horns and came to the conclusion that the DIY HF section was running at about&nbsp; 112 dB watt per meter average, peaking at about 114 dB. This is consistent with the manufactures specifications. It is about 2 dB more efficient in the mid band compared to an 18sound driver I measured - once again this was consistent with the manufactures specifications - see plots below.I have shown what the Lake processing curves look like assuming that the LF and HF had the same impedance by raising the LF gain 6dB - The gain is then on average 7 dB more on the LF than the HF. Based on the HF sensitivity of 112 dB, the 12&quot; LF has an average sensitivity of 105 dB and a peak of 110 dB.That my best guess ... and its as per my original specification in my first post. The only change since then is that the crossover is now 700Hz.I have also modelled everything else I could find and compared them. Its probably reasonable to assume that there is some relativity between the results even if the absolute values are not perfect. In that respect, for its size and weight the DIY has more output than anything I could find.&nbsp; That&#039;s one of the reasons I decided to build it.I hope this helps - PeterEDIT - PS in the current world of exaggerated BS specifications - LF maximum SPL = 147.5 dB, HF&nbsp; Maximum SPL = 144 dB 8O~8-O~:shock:8O~8-O~:shock::roll: (maximum/peak efficiency x peak watts)</blockquote>

[QUOTE="Peter Morris, post: 138546, member: 652"] Re: New DIY Mid High Its not easy as a DIY-er to produce accurate sensitivity figures. I did some comparisons with different drivers and horns and came to the conclusion that the DIY HF section was running at about 112 dB watt per meter average, peaking at about 114 dB. This is consistent with the manufactures specifications. It is about 2 dB more efficient in the mid band compared to an 18sound driver I measured - once again this was consistent with the manufactures specifications - see plots below. I have shown what the Lake processing curves look like assuming that the LF and HF had the same impedance by raising the LF gain 6dB - The gain is then on average 7 dB more on the LF than the HF. Based on the HF sensitivity of 112 dB, the 12" LF has an average sensitivity of 105 dB and a peak of 110 dB. That my [B]best guess[/B] ... and its as per my original specification in my first post. The only change since then is that the crossover is now 700Hz. I have also modelled everything else I could find and compared them. Its probably reasonable to assume that there is some relativity between the results even if the absolute values are not perfect. In that respect, for its size and weight the DIY has more output than anything I could find. That's one of the reasons I decided to build it. I hope this helps - Peter EDIT - PS in the current world of exaggerated BS specifications - [COLOR=#b22222]LF maximum SPL = 147.5 dB, HF Maximum SPL = 144 dB [/COLOR]8O~8-O~:shock:8O~8-O~:shock::roll: (maximum/peak efficiency x peak watts) [/QUOTE]

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