Video of K5 Series UPDATED: Features: Rockville DV10K52 Dual 10" K5 2400w Car Subwoofer Pre-loaded In Vented Sub Enclosure Peak Power Handling: 2400 Watts Program Power Handling: 1200 Watts CEA Rated RMS Power Handling: 600 Watts Final Impedance: 2 Ohm ¾" MDF enclosure Bonded stapled and braced Computer designed vents Angled at 15 % for perfect bass alignment High quality aviation grade tweed carpet Satin Nickel speaker wire push terminals Enclosure air space is 1.39 Cu Ft per sub Vent dimensions (inches): 3" x8.75" x 11.5" Tuning frequency of enclosure: 38Hz 2" 4-Layer Black Aluminum Voice Coils Wound with OFC (100% Copper) Wire The wire we use to wind the voice coil is imported from Japan which is way better quality than the standard China wire 40 Oz High Quality Magnet Cast Iron Basket With Black Sanded Finish Fiber Reinforced Ultra Stiff Black Non-Pressed Paper Cone - This cone is very efficient which makes the speaker sound louder even without requiring a lot of power to push it Thick Foam Surround Provides Incredible Sound Quality With Minimal Distortion Blue Stitching Cone Reinforcement Ensures Long Life Polypropylene Dust cap Gold-Plated spring loaded push terminals Impedance: Single 4-Ohm Voice Coils Vented Hole on T-yoke Enhances Heat Dissipation Mounting Gasket with Rockville branding Makes it Easy To Mount the Subwoofer Air-Tight High BL Magnetic Motor Gap High grade black glue that handles extremely high temperatures which allows our woofer to handle even more power Cutout Diameter: 9.05 inches Mounting Depth: 4.52 inches Frequency Response: 38 Hz - 1.3K kHz 6mm T-Yoke + 6mm Washer Sensitivity: 87.7dB Weight: 56.22 lbs. Dimension: 14.57" x 14.17" x 28.54" Shipping Weight: 58.5 Lbs. Shipping Box Dimensions: 30" x 18.7" x 15.7" Inches Detailed Info: Body: Non-Pressed Paper Gap Plate Inside Diameter: 70mm (2.75 inches) Gap Plate Outside Diameter: 140mm (5.51 inches) Gap Plate Thickness: 25mm (0.98 inches) Yoke Outside Diameter: 130mm (5.11 inches) Yoke Thickness: 6mm (0.23 inches) Yoke Pole Diameter: 50mm (2 inches) T/S Parameters (Tested on a Klippel): Electrical Parameters Electrical voice coil resistance at DC: Re 3.41 Ohm Frequency independent part of voice coil inductance: Le 0.905 mH Para-inductance of voice coil: L2 1.701 mH Electrical resistance due to eddy current losses: R2 16.06 Ohm Electrical capacitance representing moving mass: Cmes 576.8 µF Electrical inductance representing driver compliance: Lces 29.57 mH Resistance due to mechanical losses: Res 37.39 Ohm Driver resonance frequency: fs 38.5 Hz Mechanical Parameters Using laser Mechanical mass of driver diaphragm assembly including air load and voice coil: Mms 90.416 g Mechanical mass of voice coil and diaphragm without air load: Mmd (Sd) 84.124 g Mechanical resistance of total-driver losses: Rms 4.192 kg/s Mechanical compliance of driver suspension: Cms 0.189 mm/N Mechanical stiffness of driver suspension: Kms 5.3 N/mm Force factor (Bl product): Bl 12.52 N/A Suspension creep factor: Lambda s 0.022 Loss factors Total Q-factor considering all losses: Qtp 0.438 Mechanical Q-factor of driver in free air considering Rms only: Qms 5.222 Electrical Q-factor of driver in free air considering Re only: Qes 0.477 Total Q-factor considering Re and Rms only: Qts 0.437 Other Parameters Equivalent air volume of suspension: Vas 26.3507 (1) Reference efficiency (2 pi-radiation using Re): n0 0.304 % Characteristic sound pressure level (SPL at 1m for 1W @ Re): Lm 87.03 dB Nominal sensitivity (SPL at 1m for 1W @ Zn): Lnom 87.72 dB Root-mean-square fitting error of driver impedance Z(f): rmse Z 3.97 % Root-mean-square fitting error of transfer function Hx (f): rmse Hx 2.28 % Diaphragm area: Sd 314.16 cm2
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