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Dayton Audio RS100-4 4″ Reference Full-Range Driver 4 Ohm 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. Woofer features a black anodized cone, heavy-duty 6-hole cast frame, low-loss rubber surround, solid aluminum phase plug, rubber magnet boot, and gold terminals. PRODUCT SPECIFICATIONS Power Handling (RMS) 30 Watts Power Handling (max) 60 Watts Impedance 4 ohms Frequency Response 80 to 20,000 Hz Sensitivity 84.2 dB 1W/1m Voice Coil Diameter 1″ THIELE-SMALL PARAMETERS Resonant Frequency (Fs) 80.2 Hz DC Resistance (Re) 3.0 ohms Voice Coil Inductance (Le) 0.67 mH Mechanical Q (Qms) 3.10 Electromagnetic Q (Qes) 0.57 Total Q (Qts) 0.48 Compliance Equivalent Volume (Vas) 0.07 ft.³ Mechanical Compliance of Suspension (Cms) 1.00 mm/N BL Product (BL) 3.22 Tm Diaphragm Mass Inc. Airload (Mms) 3.9g Maximum Linear Excursion (Xmax) 4 mm Surface Area of Cone (Sd) 37.4 cm² 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 3.86″ Baffle Cutout Diameter 3.04″ Depth 2.01″ Bolt Circle Diameter 3.54″ # Mounting Holes 6 OPTIMUM CABINET SIZE * Sealed Volume 0.03 ft.³ Sealed F3 143 Hz Vented Volume 0.10 ft.³ Vented F3 72 Hz * Enclosure volume/F3s based on BassBox “optimum” calculations – Dayton Audio RS100-4 4″ Reference Full-Range Driver 4 Ohm Brand Dayton Audio Model RS100-4 Part Number 295-378 UPC 844632068133 Product Category Woofers Product Rating (22 Reviews) Unit of Measure ea Weight 1.4000