Brand NEW! Dayton Audio DC160-4 6-1/2" Classic Woofer Speaker One of the main design goals at Dayton Audio is to create loudspeakers that can achieve high levels of performance at reasonable prices. The Dayton Audio DC160-4 6-1/2" woofer is a great example of this approach. It features a non-pressed treated paper cone, rubber half-roll surround, ASV voice coil, vented pole piece, coated cloth dust cap, and excellent low frequency response. Product Specifications Nominal Diameter6-1/2"Power Handling (RMS)60 Watts Power Handling (max)120 WattsImpedance4 ohms Frequency Response30 to 4,000 HzSensitivity88.3 dB 2.83V/1m Voice Coil Diameter1.4"Magnet Weight15 oz. Thiele-Small Parameters Resonant Frequency (Fs)39 HzDC Resistance (Re)3.4 ohms Voice Coil Inductance (Le)0.99 mHMechanical Q (Qms)3.31 Electromagnetic Q (Qes)0.49Total Q (Qts)0.43 Compliance Equivalent Volume (Vas)0.53 ft.Mechanical Compliance of Suspension (Cms)0.57 mm/N BL Product (BL)7.02 TmDiaphragm Mass Inc. Airload (Mms)29.2g Maximum Linear Excursion (Xmax)3.4 mmSurface Area of Cone (Sd)136.8 cm Materials of Construction Cone MaterialCoated PaperSurround MaterialRubber Voice Coil Wire MaterialCopperVoice Coil FormerAluminum Basket / Frame MaterialSteelMagnet MaterialFerrite Mounting Information Overall Outside Diameter6.5"Baffle Cutout Diameter5.69" Depth3.04"Bolt Circle Diameter6.16" # Mounting Holes4 Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion) Sealed Volume0.17 ft.Sealed F377 Hz Vented Volume0.50 ft.Vented F341 Hz - All international buyers are responsible for all tax, duties and/or customs fees.