4" Paper Cone Foam Surround Replacement Speaker - Woofer 70 Watts, 8 Ohms

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1 Replacement Woofer - 70 Watts, 8 Ohms These 4" poly-laminated paper cone woofers are an excellent replacement for dozens of brands and models of this size woofer. Perfect for use in sealed-box home theater and music systems Poly-laminated paper cone, treated foam surround, and polymer dust cap Smooth frequency response with minimal cone breakup PRODUCT SPECIFICATIONS Power Handling (RMS) 40 Watts Power Handling (max) 70 Watts Impedance 8 ohms Frequency Response 100 to 10,000 Hz Sensitivity 84 dB 1W/1m Voice Coil Diameter 1" THIELE-SMALL PARAMETERS Resonant Frequency (Fs) 98 Hz DC Resistance (Re) 7.49 ohms Voice Coil Inductance (Le) 0.88 mH Mechanical Q (Qms) 4.55 Electromagnetic Q (Qes) 1.90 Total Q (Qts) 1.34 Compliance Equivalent Volume (Vas) 0.12 ft.³ Maximum Linear Excursion (Xmax) 2.5 mm MATERIALS OF CONSTRUCTION Cone Material Treated Paper Magnet Material Ferrite MOUNTING INFORMATION Overall Outside Diameter 4.125" Baffle Cutout Diameter 3.75" Depth 2.125" # Mounting Holes 4 OPTIMUM CABINET SIZE * Sealed Volume 0.09 ft.³ Sealed F3 104 Hz Vented Volume 1.26 ft.³ Vented F3 53 Hz * Enclosure volume/F3s based on BassBox "optimum" calculations GRS 4PF-8 4" Paper Cone Foam Surround Woofer Brand GRS Model 4PF-8 Show more