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<blockquote data-quote="Bennett Prescott" data-source="post: 141596" data-attributes="member: 4">Re: 60 Degree&nbsp; DIY Mid HiHi Ossian, others have posted great answers but I wanted to get back to you as well.BMS don&#039;t make it clear on what horn they have measured the sensitivity numbers for any of their compression drivers, so we have been unable to replicate them. On any of our horns, we measure sensitivity averaged across the stated usable frequency range of the driver similar to our flagship 3&quot; or 4&quot; coil compression drivers. As Ivan notes everyone&#039;s application is different, so it is critical to test to destruction in order to see which driver can deliver more real world SPL.Our spec sheets list both AES and &quot;continuous&quot; (2x AES) power, the latter is intended to be used as an amplifier sizing guide: e.g. the <a href="http://www.bcspeakers.com/products/hf-driver/1-4/de980tn" target="_blank">DE980TN</a> will likely be well matched by an amplifier that can deliver about 220 watts. Nothing magic about power handing in a compression driver - there&#039;s no active cooling, thermal mass is what it is, and the coils are very short and light, so power handing is more or less dictated by the diameter of the coil. Of course some coil suppliers can deliver better power handling than others, we have only been able to qualify two HF coil suppliers in the world.We hope to have first samples of the DE1090TN and DE990TN available to our OEM customers in the late fall, and probably will begin manufacturing for distribution around the end of the year.</blockquote>

[QUOTE="Bennett Prescott, post: 141596, member: 4"] Re: 60 Degree DIY Mid Hi Hi Ossian, others have posted great answers but I wanted to get back to you as well. BMS don't make it clear on what horn they have measured the sensitivity numbers for any of their compression drivers, so we have been unable to replicate them. On any of our horns, we measure sensitivity averaged across the stated usable frequency range of the driver similar to our flagship 3" or 4" coil compression drivers. As Ivan notes everyone's application is different, so it is critical to test to destruction in order to see which driver can deliver more real world SPL. Our spec sheets list both AES and "continuous" (2x AES) power, the latter is intended to be used as an amplifier sizing guide: e.g. the [URL="http://www.bcspeakers.com/products/hf-driver/1-4/de980tn"]DE980TN[/URL] will likely be well matched by an amplifier that can deliver about 220 watts. Nothing magic about power handing in a compression driver - there's no active cooling, thermal mass is what it is, and the coils are very short and light, so power handing is more or less dictated by the diameter of the coil. Of course some coil suppliers can deliver better power handling than others, we have only been able to qualify two HF coil suppliers in the world. We hope to have first samples of the DE1090TN and DE990TN available to our OEM customers in the late fall, and probably will begin manufacturing for distribution around the end of the year. [/QUOTE]

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