Originally Posted by LTD02
i'm a little lost. what is the advantage of this design?
this design seems to do quite well for a low cost driver in a complex build of modest size.
is the target the skilled woodworker with no money (the amish, lol)?
i'm honestly not understanding what frontier this build is hitting on.
I tried to clarify my ideas behind this design earlier. Over at AudioKarma, Zilch and the folks have some collaborative DIY designs, one of which is the Indignia. The Indignia is a very listenable speaker, yet is a very affordable project, and is simple enough that it is possible for someone new to DIY to build. Well, like most of the smaller speakers on the planet, the Indignias needed a sub to really sound their best. Hence, Insubnia was born. This tapped horn is an offshoot of the Insubnia project.
If I recall, the Indignia's are about 85-87 dB 1W 1m, so I don't need a crazy efficient sub to match well with them. They don't take a ton of power, so a 105 dB limit was fine. Since I could compromise SPL, I chose to go as low as I could and kept it as small as possible. The Exodus Anarchy is a great fit in this regard, as it has a relatively large XBL2 motor and a tiny little cone. The rest of the driver's parameters provide a good fit for use in a tapped horn too.
Now - is it practical? No, probably not. Since when is audio ever about practical? Sure, a cheap 12" in a 3 cubic foot ported box might provide a similar response for far less money in a simple box. That was not my intent.
This build is an easy way for anyone to play with a tapped horn. Sure, the driver costs a bit, but it is still a ~$200 build all in, with one of Jack's amps driving it. Is it cool? No doubt. Did it hang with the JTR's you see in that pic near the front of this thread until we got way past the recommended drive levels? It did just fine thank you, and better than I anticipated.
I initially designed this to see if I could. Once I mentioned it on several forums, people started asking about it, so I figured there was a little interest. I finished the design and developed a nice fold, Radman12 took the plunge and built one, then I measured the results, so here we are.
So - really - what is this for? It certainly will not work in a big home theater setting, at least not alone. Four would be a good start, and there still may be headroom issues. I really designed it for someone like me to use in a secondary system. I like my bass with movies and music on my primary system, and I miss the low end when I am listening to other systems that do not reach as low.