Brand NEW! Including 90 Days USA Factory Warranty. The 8MB450-4 v2 8" from PRV Audio is a pro audio midbass woofer that offers smooth lower response through a punchy midbass range and the frequency response that takes your applications smoothly through the 7,500 Hz range. Highlights Impressive 93.5 dB sensitivity Large 2" voice coil for high power handling High output, low distortion design Ideal for use in studio monitors, hi-fi, pro loudspeakers, or car audio installations PRV Audio 8MB450-4 v2 8" Pro Audio Midbass Speaker 4 Ohm The 8MB450-4 v2 8" from PRV Audio is a pro audio midbass woofer that offers smooth lower response through a punchy midbass range and the frequency response that takes your applications smoothly through the 7,500 Hz range. The 2" voice coil, durable spider suspension and the woven surround are all supported by the sturdy steel basket. These components ensure the 8MB450-4 v2's ability to withstand long hours of operation without compromising efficiency of the speaker. A thick, yet light rigid cone ensures accurate response and power handling. Product Specifications Nominal Diameter - 8" Power Handling (RMS) - 225 Watts Power Handling (max) - 450 Watts Impedance - 4 ohms Frequency Response - 75 to 7,500 Hz Sensitivity - 93.5 dB 2.83V/1m Voice Coil Diameter - 2" Thiele-Small Parameters Resonant Frequency (Fs) - 76.6 Hz DC Resistance (Re) - 3.6 ohms Voice Coil Inductance (Le) - 0.17 mH Mechanical Q (Qms) - 22.84 Electromagnetic Q (Qes) - 0.92 Total Q (Qts) - 0.88 Compliance Equivalent Volume (Vas) - 0.60 ft. Mechanical Compliance of Suspension (Cms) - 0.21 mm/N BL Product (BL) - 6.19 Tm Diaphragm Mass Inc. Airload (Mms) - 20.48g Moving Mass Of Diaphragm (Mmd) - 18.37 Maximum Linear Excursion (Xmax) - 4.5 mm Surface Area of Cone (Sd) - 241 cm Materials of Construction Cone Material - Paper Surround Material - Cloth Voice Coil Wire Material - CCA Voice Coil Former - Kapton / Polyimide Basket / Frame Material - Steel Magnet Material - Ferrite Mounting Information Overall Outside Diameter - 8.27" Baffle Cutout Diameter - 7.17" Depth - 3.31" Bolt Circle Diameter - 7.75" # Mounting Holes - 4 Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion) Sealed Volume - 0.893 ft. Sealed F3 - 81.21 Hz Vented Volume - 2.812 ft. Vented F3 - 45.57 Hz - All international buyers are responsible for all tax, duties and/or customs fees.