Brand NEW! Including 90 Days USA Factory Warranty. The Dayton Audio PS Series drivers do it all: true bass, articulate midrange, and balanced, extended highs. Key Features High sensitivity/minimal distortion?an ideal match for lower powered amplifiers Parasitic HF cone and carefully engineered phase plug extend on- and off-axis response Solid bass performance, thanks to usefully high excursion capability (4.8 mm Xmax) Optimized neodymium magnet provides high motor strength Low-mass copper clad aluminum voice coil Copper cap and copper ring on pole piece reduce inductance and distortion Kevlar reinforced paper cone is lightweight yet rigid and well controlled. The Dayton Audio PS Series drivers do it all: true bass, articulate midrange, and balanced, extended highs. An intensive program of design and testing has yielded full-range speakers that feature high sensitivity and smooth response, both on- and off-axis. Although an ideal match for lower powered Class A and Class T designs, the PS220-8 8" driver's superb resolution and natural sound quality make it a viable option for an even wider variety of applications. The PS Series' audio performance is complemented by the speaker's striking appearance?they look great in dipole and other open back designs, too! Product Specifications Nominal Diameter 8" Bolt Circle Diameter 8.27 Moving Mass Of Diaphragm (Mmd) 8.4 Power Handling (RMS) 40 Watts Power Handling (MAX) 80 Watts Impedance 8? Frequency Response 40 to 25,000Hz Sensitivity 96.5dB 2.83V/1m Voice Coil Diameter 1" Thiele-Small Parameters Resonant Frequency (Fs) 46.4Hz DC Resistance (Re) 6.2? Voice Coil Inductance (Le) 0.73mH Mechanical Q (Qms) 5.73 Electromagnetic Q (Qes) 0.4 Total Q (Qts) 0.38 Compliance Equivalent Volume (Vas) 3.19ft Mechanical Compliance of Suspension (Cms) 1.41mm/N BL Product (BL) 6.15T·m Maximum Linear Excursion (Xmax) 4.8mm Surface Area of Cone (Sd) 216.4cm Materials of Construction Cone Material Paper / Kevlar Surround Material Rubber Voice Coil Wire Material Copper Voice Coil Former Aluminum Basket / Frame Material Cast Aluminum Magnet Material Neodymium Mounting Information Overall Outside Diameter 8.72" Baffle Cutout Diameter 7.13" Depth 3.7" # Mounting Holes 6 Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion) Sealed Volume 0.5ft Sealed F3 108Hz Vented Volume 1.15ft Vented F3 68Hz - All international buyers are responsible for all tax, duties and/or customs fees.