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convert Thiel-Small parameters to optimum enclosure volume, and vice-versa?
Is there a straightahead method for determining the optimum volume for
a loudspeaker enclosure based on a particular driver's Thiel-Small parameters? And conversely, is there a way to determine the optimum Thiel-Small parameters (or, really, to select an appropriate driver) based on an existing enclosure's volume & port size? And is there a way to determine how a given driver will perform in a given enclosure if you have all that information? Thanks. |
#2
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Roscoe East wrote: Is there a straightahead method for determining the optimum volume for a loudspeaker enclosure based on a particular driver's Thiel-Small parameters? Yes, if you are willing to define what you mean by "optimum." The problem being is that optimum is a multi-dimensional system. For example, does optimum mean maximum bandwidth, flattest response, greatest low frequency excursion limited output, best transient response, smallest size and so forth? Or some combination thereof? Which performance parameter(s) are you willing to compromise to optimize some other parameter(s)? You may answer "I want maximally flat (Butterworth) response" as "optimum," and then learn that the driver you have simply can't get you there in ANY enclosure. Another driver might get you there, but at significant cost, for example, a driver with a Qts of 0.2 COULD be used in a maximally flat, sealed box system, to be sure, but you'd end up with a very efficienct system with a very high cutoff frequency, most likely. After you spent all that money on this driver with it's big magnet, you might be justified in concluding that it's not an "optimal" design. And conversely, is there a way to determine the optimum Thiel-Small parameters (or, really, to select an appropriate driver) based on an existing enclosure's volume & port size? Again, if you can answer the question I posed above, the answer is yes. And is there a way to determine how a given driver will perform in a given enclosure if you have all that information? Yes, to a very great extent, especially in the so-called "piston band" region of operation. |
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