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: 52.8 Lbs.
• Dimensions of enclosure: 28.5" x 17.25" x 14.25"
• 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