Brand NEW! Including 90 Days USA Factory Warranty. The Dayton Audio Reference Series sets a new standard of value in high-performance loudspeaker drivers. Utilizing a low-distortion motor system with two short-circuit paths and a rigid aluminum cone, the Reference Series can outperform drivers that cost several times the price. Key Features Long-excursion motor and suspension for strong bass performance Subtle yet high-tech look makes a bold cosmetic statement Ultra-low stray magnetic field allows extremely close proximity to CRT's Designed and engineered in the USA The Dayton Audio Reference Series sets a new standard of value in high-performance loudspeaker drivers. Utilizing a low-distortion motor system with two short-circuit paths and a rigid aluminum cone, the Reference Series can outperform drivers that cost several times the price. Their low-distortion characteristics and high excursion capabilities provide exceptional clarity, detail, and dynamics. Woofers feature a shielded motor system, black anodized cone, heavy-duty 6-hole cast frame, low-loss rubber surround, and solid aluminum phase plug. Product Specifications Nominal Diameter 7" Bolt Circle Diameter 6.63 Moving Mass Of Diaphragm (Mmd) 17 Power Handling (RMS) 60 Watts Power Handling (MAX) 120 Watts Impedance 8? Frequency Response 41 to 3,600Hz Sensitivity 86.9dB 2.83V/1m Voice Coil Diameter 1" Thiele-Small Parameters Resonant Frequency (Fs) 37.7Hz DC Resistance (Re) 6.4? Voice Coil Inductance (Le) 0.79mH Mechanical Q (Qms) 1.45 Electromagnetic Q (Qes) 0.49 Total Q (Qts) 0.36 Compliance Equivalent Volume (Vas) 0.812ft Mechanical Compliance of Suspension (Cms) 1.05mm/N BL Product (BL) 7.28T·m Maximum Linear Excursion (Xmax) 6mm Surface Area of Cone (Sd) 124.7cm Materials of Construction Cone Material Aluminum Surround Material Rubber Voice Coil Wire Material Copper Voice Coil Former Aluminum Basket / Frame Material Cast Aluminum Magnet Material Ferrite Mounting Information Overall Outside Diameter 7.11" Baffle Cutout Diameter 5.75" Depth 3.86" # Mounting Holes 6 Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion) Sealed Volume 0.22ft Sealed F3 88Hz Vented Volume 0.49ft Vented F3 50Hz - All international buyers are responsible for all tax, duties and/or customs fees.