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I want one. I have read about these enclosures and I am facinated and I want to attempt one. For now I just need to design about three of them. My question is, who knows what about these enclosures?
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Is this for house or car? I asked it once before and was told it was a waste of time in a car. They need a lot of room too. Details on how to build them can be found in the Loudspeaker Design Cookbook. I would recommend getting the book, it has a lot of valuable info.
------------------ rybaudio@freeze.com MECP certified at 14 years old SQ first, SPL last
Posts: 3957 | From: State College, PA | Registered: Sep 2000
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posted
For a car, bring the challenge. Trick, well yeah, but so is a bandpass. I think I have the technical aspect down, I just need to make some designs. I will be using a folded line and most likely will use taper. I am not sure how much taper, probably a small one. I am surprised that they would only have a 1/2 octave response above and below the tuning, if that is true, I am wasting my time, but I doubt that is true, where did you get told that?
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I don't think that is true, the +- 1/2 octave thing. That would be a very small range, especialy with the front of the speaker radiating to the listening area.
------------------ rybaudio@freeze.com MECP certified at 14 years old SQ first, SPL last
Posts: 3957 | From: State College, PA | Registered: Sep 2000
| IP: Logged |
posted
Designing the enclosure is easy. Designing one while taking into account the car is the hard part.
With a TL you have to balance line length, cross sectional area, and fill. All three alter the pressure in the line and the velocity through it. Now stick a large (but rather unknown) acoustic resistance on the front of the vent like a car interior and all your calcs are worthless. If you have LOTS of time (like weeks)to experiment with fill densities (since the box is already built it is hard ot alter line length and area...), go right ahead and build it. Otherwise, expect margtinal to good results, but not great. If you are going to do it only halfassed, why bother.
------------------ Blow your mind - PORT your box!
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well don't let everyone discourage you. i wouldn't tell anyone that is advancing their knowledge to just forget about it. i have designed a few. one of them extremely impressive. hitting 137 with 1 8" and 200w. at a freq of 35hz. in a 87 civic and it would buckle the roof with normal music. also, fill density is totally optional. its just in how you want it to sound personally. the most important part with txlines is the qts of the driver you are using. you will find that if you use a high qts driver that your line will become very long and skinnier. and just about any driver with a qts over .6 will sound like total a$$. if you want to know alot more give me an email. jellis@valkyrie.net
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The only reasons to design a TL are low end extension and SQ. A car gives you all the low end extension you need without a TL, and the SQ is the hardest part to dial in in a car. SPL is the LAST thing I would build a TL for. And how can fill density be 'optional'? Unless you are building a full length line, fill is a NECESSITY.
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