Works great in ported and sealed boxes in all vehicles shapes and sizes! This listing includes: (1) DS18 8" Subwoofer EXL-X8.2D SPECIFICATIONS: Nominal Diameter: 8 inch Nominal Impedance: 2+2 Ohms RMS Power Handing: 600 Watts Maximum Power Handing: 1200 Watts Sensitivity (1w/1m): 89.11dB Frequency Response: 38 1.0KHz Recommended Lo Pass Crossover: 100Hz Voice Coil Diameter: 2.5" (63.5mm) Voice Coil Former Material: Black Aluminum Winding Material: SV Basket Material: Aluminum Frame Material: Aluminum Magnet Material: Ferrite Magnet Weight: 130 Oz THIELE & SMALL PARAMETERS: Equivalent Volume Vas: 2.5L Excursion X-max: 24 mm Free Air Resonance Fs: 70Hz Mechanical Factor Qms: 6.852 Electrical Factor Qes: 0.987 Total Factor Qts: 0.993 Cone Area Sd: 201.06 cm² Mechanical Mass Mms: 163.24g Bl Factor Bl: 21.4 N/A DC Resistance Re: 2.0+2.0 Ohms Inductance Le: 11.21mH Mechanical Mass Without Air Mmd: 158.35g Mechanical Compliance Cms: 0.025 mm/N MEASUREMENTS: Overall Diameter: 8.58" (218mm) Front Mount Baffle Cutout: 7.36" (187mm) Mounting Depth: 5.51" (140mm) Overall Depth: 6.61" (168mm). Please make sure to box up product in original boxes with all paperwork and parts. Speakers with burnt coils, is frozen up, or has physical damage will not be accepted. Amplifiers that have been smoked from improper use will not be accepted.
(Boxes, Packing, Instructions, ETC) Everything we sent needs to come back. No physical damage will be accepted!!! Big Jeff Online's customer service department is staffed with real people (Mon-Fri 8AM-4PM), looking to help answer any questions you may have.