Brand NEW! Dayton Audio DC130BS-8 Classic Series 5-1/4" shielded woofer for use as a great replacement bookshelf speaker, midbass in 3-way designs, or even as a small subwoofer. Dayton Audio DC130BS-8 5-1/4" Classic Shielded Woofer Dayton Audio Classic Series woofers are excellent for use as replacement speakers or for new loudspeaker system design and construction. The DC130BS-8 5-1/4" woofer has developed quite a reputation for having the best bang-for-the-buck performance and value available anywhere. You can even be use the DC130BS-8 as a small subwoofer! The excellent low frequency performance will amaze you. A non-pressed treated paper cone allows for smooth frequency response, while the high temperature aluminum voice coil increases power handling without compression. Longevity is ensured with the use of a rubber surround, treated cloth dust cap, and an extended bump plate. Product Specifications Nominal Diameter 5-1/4" Power Handling (RMS) 30 Watts Power Handling (max) 60 Watts Impedance 8 ohms Frequency Response 55 to 4,000 Hz Sensitivity 88.9 dB 2.83V/1m Voice Coil Diameter 1" Magnet Weight 10 oz. Thiele-Small Parameters Resonant Frequency (Fs) 50.5 Hz DC Resistance (Re) 5.8 ohms Voice Coil Inductance (Le) 0.82 mH Mechanical Q (Qms) 1.82 Electromagnetic Q (Qes) 0.49 Total Q (Qts) 0.39 Compliance Equivalent Volume (Vas) 0.31 ft. Mechanical Compliance of Suspension (Cms) 1.13 mm/N BL Product (BL) 5.71 Tm Diaphragm Mass Inc. Airload (Mms) 8.8g Maximum Linear Excursion (Xmax) 2.5 mm Surface Area of Cone (Sd) 91.6 cm Materials of Construction Cone Material - Treated Paper Surround Material - Rubber Voice Coil Wire Material - Copper Voice Coil Former - Aluminum Basket / Frame Material - Steel Magnet Material - Ferrite Mounting Information Overall Outside Diameter - 5.71" Baffle Cutout Diameter - 4.72" Depth - 3.05" Bolt Circle Diameter - 5.24" # Mounting Holes - 4 Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion) Sealed Volume - 0.11 ft. Sealed F3116 Hz Vented Volume - 0.35 ft. Vented F361 Hz - All international buyers are responsible for all tax, duties and/or customs fees.