Brand NEW! Built for loud, clear vocal performance in tight, compact spaces, PRV Audio's 6MR500-NDY-4 neodymium-powered midrange features a sensitivity of 100 dB (2.83V/1m) and weighs about 3 pounds! 4 ohm impedance. Key Features Wide bandwidth that reaches out to 15 kHz and higher Naturally damped response for reduced top-octave ringing Low inductance for great transients and improved high frequency response High EBP for horn-loaded enclosures High 96 dB sensitivity means more sound per watt The 6MR500-NDY-4, from PRV Audio, is made to be a class-leading midrange woofer in the pro audio realm, as well as high output car and home audio, thanks to high-power neodymium radial slugs that immerse the voice coil in a strong magnetic field. Not only does the unique motor design keep the mounting depth at less than 3" (great for car doors), it provides superior speaker control for reduced distortion. Additionally, the pole piece copper has a copper sleeve which lowers inductance thereby improving high frequency response. With a usable, extended frequency response from 104 to 12,500 Hz, this midwoofer also works great as a high output, full-range satellite speaker. A bumped backplate, vented magnet system, vented pole piece, Kapton former, open cast-aluminum frame, and treated-cloth surround allow for high power handling, while protecting this driver from extreme transient power peaks. Product Specifications Nominal Diameter 6-1/2" Moving Mass Of Diaphragm (Mmd) 14.14 Power Handling (RMS) 250 Watts Power Handling (MAX) 500 Watts Impedance 4? Frequency Response 105 to 12,500Hz Sensitivity 96dB 2.83V/1m Voice Coil Diameter 2" Thiele-Small Parameters Resonant Frequency (Fs) 99.8Hz DC Resistance (Re) 3.8? Voice Coil Inductance (Le) 0.05mH Mechanical Q (Qms) 23.1 Electromagnetic Q (Qes) 0.47 Total Q (Qts) 0.43 Compliance Equivalent Volume (Vas) 0.18ft Mechanical Compliance of Suspension (Cms) 0.18mm/N BL Product (BL) 8.77T·m Maximum Linear Excursion (Xmax) 4.42mm Surface Area of Cone (Sd) 143cm Materials of Construction Cone Material Paper Surround Material Cloth Voice Coil Wire Material CCA Voice Coil Former Kapton / Polyimide Basket / Frame Material Cast Aluminum Magnet Material Neodymium Mounting Information Overall Outside Diameter 6.43" across the flats, 7.08" Baffle Cutout Diameter 5.71" Depth 2.95" # Mounting Holes 4 Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion) Sealed Volume 0.2ft Sealed F3 204Hz Vented Volume 0.25ft Vented F3 100Hz - All international buyers are responsible for all tax, duties and/or customs fees.