About the Alpine RS-W10D4 Shallow-mount upgrade Alpine's R-Series subwoofers are known for their high power handling and tight response. The new RS-W10D4 shallow-mount sub delivers the same quality in a speaker that'll fit where other subs won't. Small size, big impact Built around a solid, cast-aluminum frame, this shallow sub requires a mounting depth of only 3.25 inches. Yet the RS-W10D4's cone excursion is the same as a regular R-Series sub, so you'll enjoy the kind of impact you expect from Alpine. Fits into your system This versatile sub sounds great in sealed or ported enclosures. You can wire the dual voice coils for either 2- or 8-ohm total impedance, giving you more wiring options when setting up your system. The sub handles up to 600 watts RMS (1800 watts peak) so make sure you've got a solid amp to power it. Grille sold separately. Product highlights: 10" shallow-mount subwoofer with dual 4-ohm voice coils polypropylene cone with aluminum dust cap and butyl rubber surround cast aluminum frame frequency response: 25-100 Hz power handling: 600 watts RMS (300 watts per coil) peak power: 1800 watts sensitivity: 78 dB top-mount depth: 3.271" sealed box volume: 0.49-1.04 cu. ft. grille not included warranty: 1 year MFR # RS-W10D4 Item # 500RSW10D4 California customers: Please click here for your Proposition 65 WARNING. What's in the box: If you need assistance accessing this owner's manual, please give us a call. One 10" Dual 4-ohm voice coil shallow mount subwoofer Plastic trim ring Two 18" jumper wires (12-gauge) 2.5mm Hex key Application guide (English/ French) On-line product registration information Warranty information (English/ French) Important Notice (English/ French) Features & specs Features and Specs Size 10-inch Impedance (Ohms) 2, 8 Cone Material Polypropylene Surround Material Rubber Basket Material Cast Aluminum Grille None included Free-Air No Dual Voice Coil Yes Sensitivity 78 dB at 1 watt Frequency Response 25 - 100 Hz Max RMS Power Handling 600 Peak Power Handling (Watts) 1800 Top Mount Depth (inches) 3 5/16 Bottom Mount Depth (inches) 3 5/8 Cutout Diameter or Length (inches) 9 5/8 Frame Width 11.178 Frame Length 11.178 Vas (liters) 23.35 Fs (Hz) 31 Qts 1.19 Xmax (millimeters) 20 Parts Warranty 1 Year Labor Warranty 1 Year Box Requirements Ideal Sealed Box Volume (cubic feet) N/A Minimum Sealed Box Volume (cubic feet) 0.49 Maximum Sealed Box Volume (cubic feet) 1.04 Ideal Ported Box Volume (cubic feet) N/A Minimum Ported Box Volume (cubic feet) N/A Maximum Ported Box Volume (cubic feet) N/A Port diameter (inches) N/A Port length (inches) N/A Features Dual Voice Coils: For system flexibility, the woofer has two 4Ω voice coils. When the voice coils are wired in parallel the woofer presents a 2Ω load; when wired in series the woofer presents an 8Ω load. Terminals: The two pair of set screw terminals are located on opposite sides of the woofer frame and 18" lengths of positive and negative wire are included for wiring the voice coils in parallel or series. The terminals will accept bare wire up to 10-gauge. Enclosure: Alpine recommends mounting the RS-W10D4 sub in a sealed box with a volume (gross) of 0.49 to 1.043 ft³. Three specific volumes are listed in the manual, 0.54 ft³ (-3 dB at 32 Hz), 0.79 ft³ (-3 dB at 30 Hz), and 1.04 ft³ (-3 dB at 28 Hz).