Brand NEW! PRV Audio's Alto Series 10W650A is an impressive driver, without a high-end price. This 8 ohm 10" is a great woofer for any high output system such as pro audio or even high SPL automotive systems. With 97 dB efficiency and 325 watt of continuous power handling, this driver is capable of extremely high output. In addition, the 10W650A has a wide frequency response of 65 to 5,000 Hz, making it suitable for use in high-end guitar and bass amps. Key Features ? Vented pole piece keeps the 2.5" VC cool for continuous high power handling ? Cloth double roll surround and large raised spider can take the high demands of pro sound ? 65 to 5,000 Hz frequency response makes this mid/woofer suitable for two or three-way designs ? Capable of extreme output levels with 97 dB sensitivity and 325 watt power handling PRV Audio's Alto Series 10W650A is an impressive driver, without a high-end price. This 8 ohm 10" is a great woofer for any high output system such as pro audio or even high SPL automotive systems. With 97 dB efficiency and 325 watt of continuous power handling, this driver is capable of extremely high output. In addition, the 10W650A has a wide frequency response of 65 to 5,000 Hz, making it suitable for use in high-end guitar and bass amps. Product Specifications Nominal Diameter 10" Moving Mass Of Diaphragm (Mmd) 34.04 Power Handling (RMS) 325 Watts Power Handling (MAX) 650 Watts Impedance 4? Frequency Response 75 to 5,500Hz Sensitivity 97dB 2.83V/1m Voice Coil Diameter 2.5" Thiele-Small Parameters Resonant Frequency (Fs) 72.31Hz DC Resistance (Re) 6.1? Voice Coil Inductance (Le) 0.79mH Mechanical Q (Qms) 16.34 Electromagnetic Q (Qes) 0.47 Total Q (Qts) 0.46 Compliance Equivalent Volume (Vas) 34.04ft Mechanical Compliance of Suspension (Cms) 0.142mm/N BL Product (BL) 14.09T·m Maximum Linear Excursion (Xmax) 4.5mm Surface Area of Cone (Sd) 415cm 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 10.1" Baffle Cutout Diameter 9.25" Depth 4.72" # Mounting Holes 8 Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion) Sealed Volume 11.03ft Sealed F3 191.7Hz Vented Volume 40.71ft Vented F3 52.81Hz - All international buyers are responsible for all tax, duties and/or customs fees.