Brand NEW! Including 90 Days USA Factory Warranty. Dayton Audio?s CE40-28P-8 is an economical mini speaker that features a high-output neodymium motor, a lightweight paper cone, a front gasket, and a molded plastic frame drilled for conventional mounting. 8 ohm impedance. Key Features Racetrack-shaped paper cone with fabric surround Slim design for narrow and shallow profile installation High-energy neodymium 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 CE40-20P-8 is a slim driver that?s perfect for applications that require its shallow profile and rectangular shape. Its high-quality design features a paper cone, fabric surround, textile spider, high-performance neodymium motor, and an injection-molded frame that?s drilled for conventional mounting. Product Specifications Nominal Diameter 1 x 2" Moving Mass Of Diaphragm (Mmd) 0.37 Power Handling (RMS) 2 Watts Power Handling (MAX) 4 Watts Impedance 8? Frequency Response 550 to 15,000Hz Sensitivity 75dB 2.83V/1m Voice Coil Diameter 0.5" Thiele-Small Parameters Resonant Frequency (Fs) 608Hz DC Resistance (Re) 7? Voice Coil Inductance (Le) 0.26mH Mechanical Q (Qms) 3.96 Electromagnetic Q (Qes) 9.87 Total Q (Qts) 2.83 Mechanical Compliance of Suspension (Cms) 0.18mm/N BL Product (BL) 1.03T·m Maximum Linear Excursion (Xmax) 0.1mm Surface Area of Cone (Sd) 5.28cm Materials of Construction Cone Material Paper Surround Material Cloth Magnet Material Neodymium Mounting Information Overall Outside Diameter 1.13" x 1.57" Baffle Cutout Diameter 0.97" x 1.32" Depth 0.45" # Mounting Holes 4 - All international buyers are responsible for all tax, duties and/or customs fees.