Dayton Audio CE Series CE30MB-16B 1-1/4" Mini Speaker Black 16 Ohm The Commercial Engineering (CE) series of speaker drivers from Dayton Audio provides engineers, designers, and integrators with a line of economical small drivers that fit the diverse range of applications found in consumer electronics and audio-enabled electronic projects. The Dayton Audio CE30MB-16A is a compact, high-efficiency "headphone-style" mini speaker with a lightweight Mylar diaphragm and extended frequency range. It’s a rugged choice for adding audio to inexpensive headphones, electronic toys, and portable electronics. Note: The Mylar diaphragm is very fragile. To prevent damage, avoid contact with the diaphragm when handling. This driver should be installed behind a grille.