Check the listing for details. Dayton Audio - CE30MB-16B - 1-1/4" Mini Speaker CE Series - 16 Ohm. Condition: New. Listed at 11.89 USD. 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 16Ω 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) 15.7Ω 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) 0.0014ft³ 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) 3.1cm² 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 0.000665ft³ Sealed F3 464.5Hz Vented Volume 0.0239ft³ Vented F3 261.1Hz - All international buyers are responsible for all tax, duties and/or customs fees.