Tricker tweets? I know, Halloween has already come and gone, but I just had to use that because this little speaker has a trick about its tweeter. The Spectrum Audio 108cd is constructed of ¾" MDF for the baffle and ½" MDF for the sides, with a veryhigh-quality black ash vinyl covering all the way around. (A brown ash finish is also available.) Rapping on the cabinet results in a hollow bonk, rather than a solid thud.