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T-Line box for a Fi Bl 12
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<blockquote data-quote="Immacomputer" data-source="post: 6155592" data-attributes="member: 570419"><p>It's not that it gives bad results, it's just not an ideal transmission line for most drivers. It will still have transmission line properties and most will still sound great, be very efficient, and have an effortless bottom end.</p><p></p><p>Another problem with that watered down method is that you're not compensating for the cabin of the vehicle (which is also a 1/4 wave resonator), which will actually make the line appear much longer to the driver and to the ear. They also don't have to be that large as you don't need to use 1xSd for the line area. My current transmission line in my car is tuned to 35hz (driver Fs is 24) and the line area is only about 44in^2 (Sd = 75in^2). It models poorly alone but when I take on the expansion and line length of my cabin, I have a flat response from 17-65hz with only a mild impedance rise at 22hz. The modeled and measured results were very close too.</p></blockquote><p></p>
[QUOTE="Immacomputer, post: 6155592, member: 570419"] It's not that it gives bad results, it's just not an ideal transmission line for most drivers. It will still have transmission line properties and most will still sound great, be very efficient, and have an effortless bottom end. Another problem with that watered down method is that you're not compensating for the cabin of the vehicle (which is also a 1/4 wave resonator), which will actually make the line appear much longer to the driver and to the ear. They also don't have to be that large as you don't need to use 1xSd for the line area. My current transmission line in my car is tuned to 35hz (driver Fs is 24) and the line area is only about 44in^2 (Sd = 75in^2). It models poorly alone but when I take on the expansion and line length of my cabin, I have a flat response from 17-65hz with only a mild impedance rise at 22hz. The modeled and measured results were very close too. [/QUOTE]
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T-Line box for a Fi Bl 12
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