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 motor 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 houses the lightweight and 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. FEATURES 12” High-Performance Shallow Bass Driver Alpine Gen2 DD Linear Magnetic Circuit Cast Aluminum Frame Aluminum Dust Cap Neodymium Magnet What's in the Box: 12” R-Series Shallow Subwoofer Owner’s Manual Warranty Information Online product registration information TECH SPECS Mounting Depth: 3.25” (82.55mm) X-Max: 20mm Voice Coil: 4”(102mm) Frequency response: 26Hz – 200Hz Sensitivity (1W/1M): 81bB Nominal Impedance: 4Ω 600W RMS / 1800W Peak Power Handling Compatible with KTE-RS12G Subwoofer Grille Kit (sold separately) RS-W12D4 - THIELE-SMALL PARAMETERS Sensitivity (1W/1m): 81 dB DC Resistance (Re): 3.6∆ + 3.6∆ Free Air Resonance (Fs): 29 Hz Equivalent Stiffness: 43.84 L Mechanical Q (Qms): 7.04 Electrical Q (Qes): 1.17 Total Q (Qts): 1.49 Cone Area (Sd): 572 sq cm Linear Excursion (Xmax): 20 mm Mechanical Travel (Xmech): 54 mm