Brand NEW! Eminence's Beta-10CX is a coaxial solution to the challenge of achieving efficient, extended range output from limited baffle space. Key Features Kapton coil former Polyamide-imide coated copper voice coil Ferrite magnet Extended pole piece Pressed steel basket Paper cone Cloth accordian surround The Eminence Beta-10CX 10" Coaxial Driver is recommended for professional audio midrange reproduction in sealed loudspeaker enclosures. Also suitable for midbass or floor monitor applications in vented 2-way speaker cabinets. The Beta-10CX's coaxial design facilitates use of an HF driver to extend frequency response. Standard 1-3/8"-18 TPI threaded insert for HF horn driver (sold separately). Made in the USA. 7-year manufacturer's warranty! Product Specifications Nominal Diameter 10" Moving Mass Of Diaphragm (Mmd) 29 Power Handling (RMS) 250 Watts Power Handling (MAX) 500 Watts Impedance 8? Frequency Response 60 to 4,000Hz Sensitivity 94.3dB 2.83V/1m Voice Coil Diameter 2" Thiele-Small Parameters Resonant Frequency (Fs) 49Hz DC Resistance (Re) 5.48? Voice Coil Inductance (Le) 0.67mH Mechanical Q (Qms) 6.16 Electromagnetic Q (Qes) 0.41 Total Q (Qts) 0.38 Compliance Equivalent Volume (Vas) 2.16ft Mechanical Compliance of Suspension (Cms) 0.37mm/N BL Product (BL) 10.88T·m Maximum Linear Excursion (Xmax) 5mm Surface Area of Cone (Sd) 344.9cm Materials of Construction Cone Material Paper Surround Material Cloth Voice Coil Wire Material Copper Voice Coil Former Kapton / Polyimide Basket / Frame Material Steel Magnet Material Ferrite Mounting Information Overall Outside Diameter 10.08" Baffle Cutout Diameter 9.18" Depth 3.98" # Mounting Holes 8 Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion) Sealed Volume 0.56ft Sealed F3 107Hz Vented Volume 1.62ft Vented F3 60Hz - All international buyers are responsible for all tax, duties and/or customs fees.