Thinking about that Danley that reaches 126db at 20hz with only a 12" in a transmission line-style box. I'm thinking I could take one of the many crowd-pleasing 15" or 18" drivers we all use, here, and throw it into my riser and snake a transmission line through it to get something pretty damn comparable. I'd want to model it using King's MathCAD worksheets, first, of course. Let's say I use a Ficaraudio Q18. 1210" sd, which means a cross-sectional area for the line of around 375 sq in. So, let's say a cross-sectional area of 2.75'x1' underneath the riser. I can't see the tuning being less than 15hz (could it be less?), giving a 1/4 wavelength of just under 20'. Given a riser 14'x6', this should be no problem. Using the Harman papers to guesstimate positioning for a normal listening room, you could place the upfiring driver in the rear-center, offset to the left, snake the line to the front, across to the right, and exiting out the rear, offset to the rear-center, offset to the right, like so:
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Does the Danley do something special, aside from a transmission line, to reach it's output with only a 12"? Granted, they call it a horn, but a transmission line gives you very similar properties that a horn does, right? Maybe less output, but using a good 18" driver, should more than make up for that?
Any thoughts?
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Does the Danley do something special, aside from a transmission line, to reach it's output with only a 12"? Granted, they call it a horn, but a transmission line gives you very similar properties that a horn does, right? Maybe less output, but using a good 18" driver, should more than make up for that?
Any thoughts?
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