Brand NEW! Including 90 Days USA Factory Warranty. The Dayton Audio CE30P-4 features a paper cone, round plastic frame, rubber surround, and powerful neodymium motor structure, for small devices and projects that require big sound from a small driver. 4-ohm impedance. Key Features ? Extremely compact size in a press-fit frame ? Paper cone, rubber surround ? High-output double neodymium magnet motor Dayton Audio is pleased to introduce the new Commercial Engineering (CE) Series of small loudspeaker drivers. Engineers, designers, and integrators will benefit from how effortlessly these speaker components satisfy the diverse demands associated with consumer electronics and audio-enabled projects. Multiple types and styles are available within the CE Series driver family. Each was produced to provide excellent audio quality no matter what the overall system design goals may be, and to suit a wide spectrum of engineering requirements. These versatile yet economical loudspeakers are available in sizes from 28 mm (1-1/8") to 90 mm (3-1/2") in diameter, and with power ratings from 1.5 watts to 5 watts continuous RMS power. The Dayton Audio CE30P-4 provides big-speaker features in an extremely compact unit. It features a paper cone, rubber roll surround, and high-energy double neodymium motor structure, mounted to a robust injection-molded plastic frame that?s perfect for press-fit or glued mounting. Its design makes it perfect for use in multimedia loudspeakers, small docking speakers for portable music players, or compact television frames and sound bars, plus a variety of other applications. Product Specifications Nominal Diameter 1" Moving Mass Of Diaphragm (Mmd) 0.65 Power Handling (RMS) 2 Watts Power Handling (MAX) 4 Watts Impedance 4? Frequency Response 280 to 14,000Hz Sensitivity 81dB 2.83V/1m Voice Coil Diameter 0.51" Thiele-Small Parameters Resonant Frequency (Fs) 336Hz DC Resistance (Re) 3.4? Voice Coil Inductance (Le) 0.19mH Mechanical Q (Qms) 3.62 Electromagnetic Q (Qes) 1.03 Total Q (Qts) 0.8 Compliance Equivalent Volume (Vas) 0.00028ft Mechanical Compliance of Suspension (Cms) 0.34mm/N BL Product (BL) 2.16T·m Maximum Linear Excursion (Xmax) 0.3mm Surface Area of Cone (Sd) 4.1cm Materials of Construction Cone Material Paper Surround Material Rubber Magnet Material Neodymium Mounting Information Overall Outside Diameter 1.25" Baffle Cutout Diameter 1.19" Depth 0.57" Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion) Sealed Volume 0.000478ft Sealed F3 372.2Hz Vented Volume 0.00108ft Vented F3 179Hz - All international buyers are responsible for all tax, duties and/or customs fees.