Everything in the world is a compromise of some sort to gain something else and anyone who tells you different is not being honest with you. Saying it another way, to get this you have to give up that. When someone makes rational excuses for a compromise they are, as the old saying goes, “trying to sell you something.” (I find it interesting that “sales” is generally perceived as being a dishonest profession, one tolerated and even encouraged behavior from which the root of many of this world’s problems arise.) The joke “How can you tell when a salesperson (or politician, or...) is lying? When his/her lips are moving.” simplistically sums up the impression people have about honesty in general. OK, I’m off the soap box now and let’s get on with the show and get honest and talk about desired gains and resulting compromises.
All speaker cabinets resonate in three "modes" just as rooms do: axial (simple back-and-forth from two walls), tangential (simple bounce off of all three or four walls), and oblique (complex bounce off of all five or six walls). Making a wedge-shaped cabinet uses fewer parallel surfaces (and fewer surfaces) and minimizes the number of resonant axial modes. Wedge cabinets do little to reduce the number of tangential or oblique modes. In the next part of this series, we will see if there are other ways to deal with the remaining resonant modes. Until then, listen to your stereo with your ears and not your eyes.
But there is more about basic cabinet design and you can read about it in Part 3.
Related ArticlesSee all entries about speaker enclosures in Part 1, Part 2, Part 3, and Part 4. Also, a related article on the effects of crossover network components on driver performance.