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Double 10 and Horn
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<blockquote data-quote="Peter Morris" data-source="post: 146163" data-attributes="member: 652"><p>Re: Double 10 and Horn</p><p></p><p></p><p></p><p>If the 10s are crossed low enough then they will sum very well, which they do.</p><p> </p><p>The crossover frequency is 650Hz. Its wavelength is 528mm, more or less twice the spacing of the 10’s. </p><p></p><p>Now because the low frequency source is not circular and is twice as high as it is wide its directivity is a better match for the 90 x 50 HF horn</p><p>. </p><p>With two drivers you can achieve an efficiency greater than 99dB w/m with 700 watts of power handling. The box can also be quite small with a very useful form factor. </p><p></p><p>The 2.5 way design has a lot of issues in my opinion. The phase shift caused by the low pass filter means that the LF 10 will not combine correctly with extended range 10 unless you implement some fancy all-pass correction. In addition one 10 is doing much more work than the other; that is you have not used all the power available.</p><p></p><p>There is also no reason that you could not use one of the new 14’s or 15’s that are available. They will give you more low frequency but the trade-off will be efficiency in the low and upper mids. </p><p>The double 10 was designed as a light weight (25 kg) mid/hi box not a full range cabinet … it just depends on what you want.</p></blockquote><p></p>
[QUOTE="Peter Morris, post: 146163, member: 652"] Re: Double 10 and Horn If the 10s are crossed low enough then they will sum very well, which they do. The crossover frequency is 650Hz. Its wavelength is 528mm, more or less twice the spacing of the 10’s. Now because the low frequency source is not circular and is twice as high as it is wide its directivity is a better match for the 90 x 50 HF horn . With two drivers you can achieve an efficiency greater than 99dB w/m with 700 watts of power handling. The box can also be quite small with a very useful form factor. The 2.5 way design has a lot of issues in my opinion. The phase shift caused by the low pass filter means that the LF 10 will not combine correctly with extended range 10 unless you implement some fancy all-pass correction. In addition one 10 is doing much more work than the other; that is you have not used all the power available. There is also no reason that you could not use one of the new 14’s or 15’s that are available. They will give you more low frequency but the trade-off will be efficiency in the low and upper mids. The double 10 was designed as a light weight (25 kg) mid/hi box not a full range cabinet … it just depends on what you want. [/QUOTE]
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