I want to make a single driver speaker with my son for his first real set of speakers. I have good woodworking skills and want something that is inexpensive (as far as the drivers go). I want to give him the drivers for Christmas and then proceed with the build. For price, lets keep the driver at under $50 for the pair. I don't really have any restrictions on size. They can be floor standers or bookshelves. I would like something that has decent bass, but it is not a deal killer. Any ideas would be appreciated.