This would be with someone who has the knowledge of doing it correctly and not relying on a program to do everything for them. But, like you said, you want to do it yourself, so a program may be your way to go and nothing can beat trial and error as long as you log everything you do and learn from it.
programs tend to end up with bullshit results anyway. it's great if your car is the size of a corn field, not so great if you drive an actual car. There are ways to get ''cabin gain'' but it's just a guess. the best way will probably always be the good old test and tune method
it is likely that you will succeed in this goal as Tlines are made for SQ when designed properly, but give a great amount of output as well. Like the horn enclosure, this is mainly due to coupling. The difference is, the horn can be exponentially larger than a tline for that reason. The tline was nominally made for HT with stuffing to limit the ability for HF bands to pass through the line, but allow the LF band to go through it. This seperates the frequency range of the full range driver used to increase sound quality and accuracy of reproduction-simply put. Horns work a little different, but ironically can be calculated the same way for a different purpose, to couple the driver to the environment for high efficiency. The tline was not designed for efficiency, but to allow high efficient drivers to lower distortion in the LF range by seperation as a physical means of crossover effects. This is the basic ideas of each, though much more can be said about them and their other purposes.
I was wondering how that turned out, never heard back from you. //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif//content.invisioncic.com/y282845/emoticons/crying.gif.ec0ebefe590df0251476573bc49e46d8.gif
Programs, yes. Formulas, no. Because no program can account for the effects of cabin gain yet that I am aware of. What I do with my responses are done using individual formulas to make it as accurate as possible. Not perfect, obviously, but optimal. So, crap results from programs, i would agree to that on most of them, but cabin gain being a guess, it does not have to be. It just takes a LONG TIME to figure for it all, and calculating for up to 7 resonances of each path is all we need anyhow. After that, it becomes pretty blob-like with all of the gain responses together, then having to average them all afterward is a LOT easier. I can figure for hundreds of responses for a single vehicle in a matter of hours, but I do have a lot of the acoustical formulas set up in excel to help me speed up the process. And for those who are wondering, its not just getting the length of the modes that make the difference, as modal response is another thing. Like I always tell people that become interested, a LOT of work and time needs to be put into it, and it's not something I believe can be taught so quickly on a forum, but from what I have said so far in this post alone is enough for now //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif.
That would be nice to see, as RAM, you seem to do a great job with making the builds look pretty good. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
