Down-Firing Sealed Enclosure with a Passive Radiator Reference shallow enclosures are engineered with sealed, down-firing type and loaded with a passive radiator subwoofer and new Reference shallow subwoofers. Such a design brings tighter, more accurate bass and takes up little space. Removable Feet Reference shallow enclosures are designed with removable feet which allows for flexible placement direction to get best performance and optimize space per vehicle type. Removable Logo Badge Reference shallow enclosures are designed with a removable logo badge so you can put anywhere you like. Built Tough Reference shallow enclosures are designed with sturdy medium-density fiberboard construction and rugged black carpet covering to resist stacking weight and take a beating. General Specifications Subwoofer: 10" (250mm) Aluminum Driver Power Handling: 350W RMS, 1050W peak Sensitivity (1W/1m): 82.5dB Frequency Response (-6dB): 35Hz – 400Hz Nominal Impedance: 2 ohms Voice Coil Diameter: 2" (50mm) Enclosure dimensions: 334mmD x 630mmW x 115mmH 13-1/8"D x 24-7/8"W x 4-1/2"H Enclosure materials: 3/4” (18mm) MDF with black carpet covering What's in The Box? 1x Subwoofer Enclosure 1x Infinity Logo Badge 4x Plastic Feet 4x Screw Washer 4x Hexalobular Socket Head M6*25 Screws 1x Quick Start Guide 2x Steel Plate + 8x M5*15 Screws