Brand NEW! 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-16B 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. Product Specifications Nominal Diameter 1" Power Handling (RMS) 0.5 Watts Power Handling (MAX) 1 Watts Impedance 16? Frequency Response 400 to 20,000Hz Sensitivity 77dB 2.83V/1m Voice Coil Diameter 0.5" Thiele-Small Parameters Resonant Frequency (Fs) 401Hz DC Resistance (Re) 15.7? Voice Coil Inductance (Le) 1.35mH Mechanical Q (Qms) 2.55 Electromagnetic Q (Qes) 5.28 Total Q (Qts) 1.72 Compliance Equivalent Volume (Vas) 0.0014ft Mechanical Compliance of Suspension (Cms) 3.23mm/N BL Product (BL) 0.6T·m Maximum Linear Excursion (Xmax) 0.1mm Surface Area of Cone (Sd) 3.1cm Materials of Construction Cone MaterialPoly / Mylar Diaphragm Magnet Material Neodymium Mounting Information Overall Outside Diameter 1.17" Baffle Cutout Diameter 1.04" Depth 0.2" Recommended Enclosure Volume Sealed Volume 0.000665ft Sealed F3 464.5Hz Vented Volume 0.0239ft Vented F3 261.1Hz - All international buyers are responsible for all tax, duties and/or customs fees.