ULTRA-SHALLOW DESIGN For those looking to add powerful, hard-hitting bass performance to their vehicle but lack the space to add a subwoofer, Alpine's R-Series Shallow Subwoofer delivers the same fun and loud sound you've come to expect, now in a shallow subwoofer that's designed to fit in most vehicle applications. EXTREME OUTPUT Don't let the size fool you – the R-Series Shallow Subwoofers feature the same cone movement (20MM of excursion) as the full-size R2-Series Subwoofers for extreme output in a shallow woofer design. At the heart of the R-Series Shallow Subwoofers is an oversized 4-inch voice coil that is controlled by a powerful neodymium magnet for 600W RMS of power handling. Precise Bass Control Alpine's Gen2 DD-Linear Magnetic Circuit technology, a compact and efficient dual-gap voice coil structure, allows for better control over the motor, resulting in lower distortion and precise bass control. Powerful Bass Projection A lightweight yet rigid aluminum dust cap allows the R-Series Shallow Subwoofer to transition sound quickly with minimal distortion and project the bass off the surface of the speaker for hard-hitting yet smooth bass performance. Premium Construction The R-Series Shallow Subwoofers are constructed with a die-cast aluminum frame for a rigid and sturdy construction. For extra protection for the shallow subwoofers, an optional Shallow Subwoofer Grille Kit available in a 12” (KTE-RS12G) option (sold separately) provides a steel mesh grille that protects your investment. | Size 12-inch Voice Coil DVC Impedance 2 ohms RMS Power Rating (Watts) 600 Peak Power Rating (Watts) 1800 Cone Material Polypropylene Surround Material Rubber Free Air No Sensitivity 82dB at 1 Watt Frequency Response 25-100hz Top Mount Depth (Inches) 3 5/16 Bottom Mount Depth (Inches) 3 11/16 Cutout Diameter (Inches) 11 11/16 Vas (liters) 42.04 Fs (Hz) 28Hz Xmax (millimeters) 20 Warranty 1 Year