The Sabian 10" AA Compression Stax feature hole patterns to enhance the sound. The bottom cymbal is thin, un-lathed and flat, with 6 one-inch holes. The top is slightly smaller than the bottom, has 6 rows of Aero holes and is medium thin. The smaller top creates a tight fit, and the holes project a quick attack, emulating an electronic “clap”. Overall, they are darker and lower-pitched than many of the stacking combinations popular today. A special process gives them their unique finish.