Rockville VS12K54 12" K5 1400w Car Subwoofer in Vented Sub Enclosure Box - 4 Ohm

Features:

• Rockville VS12K54 Single 12" K5 1400w Car Subwoofer Pre-loaded In Vented Sub Enclosure
• Peak Power Handling: 1400 Watts
• Program Power Handling: 700 Watts
• CEA Rated RMS Power Handling: 350 Watts
• Final Impedance: 4 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 1.52 Cu Ft per sub
• Vent dimensions (inches): 2.25" x 7" x 8.5"
• Tuning frequency of enclosure: 35 Hz
• 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
• 50 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 Dustcap
• 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: 11.02” inches
• Mounting Depth: 5.03” inches
• Frequency Response: 25 Hz - 1.5K kHz
• 6mm T-Yoke + 6mm Washer
• Sensitivity: 88dB
• Weight: 10.1 Lbs.
• Loaded enclosure weight: 37.4 Lbs.
• Loaded enclosure dimensions (inches): 18.25” x 14.25” x 16.25”

Detailed Info:

• Body: Non-Pressed Paper
• Gap Plate Inside Diameter: 80mm (3.14 inches)
• Gap Plate Outside Diameter: 156mm (6.14 inches)
• Gap Plate Thickness: 25mm (0.98 inches)
• Yoke Outside Diameter: 145mm (5.7 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 3.31 Ohm
• Requency independent part of voice coil inductance: Le 0.944 mH
• Para-inductance of voice coil: L2 1.468 mH
• Electrical resistance due to eddy current losses: R2 14.7 Ohm
• Electrical capacitance representing moving mass: Cmes 871.67 µF
• Electrical inductance representing driver compliance: Lces 20.9 mH
• Resistance due to mechanical losses: Res 31.48 Ohm
• Driver resonance frequency: fs 37.3 Hz

Mechanical Parameters

Using laser

• Mechanical mass of driver diaphragm assembly including air load and voice coil: Mms 130.02 g
• Mechanical mass of voice coil and diaphragm without air load: Mmd (Sd) 117.731 g
• Mechanical resistance of total-driver losses: Rms 4.738 kg/s
• Mechanical compliance of driver suspension: Cms 0.14 mm/N
• Mechanical stiffness of driver suspension: Kms 7.14 N/mm
• Force factor (Bl product): Bl 12.213 N/A
• Suspension creep factor: Lambda s 0.028

Loss factors

• Total Q-factor considering all losses: Qtp 0.612
• Mechanical Q-factor of driver in free air considering Rms only: Qms 6.429
• Electrical Q-factor of driver in free air considering Re only: Qes 0.675
• Total Q-factor considering Re and Rms only: Qts 0.611

Other Parameters

• Equivalent air volume of suspension: Vas 47.7813 (1)
• Reference efficiency (2 pi-radiation using Re): n0 0.353 %
• Haracteristic sound pressure level (SPL at 1m for 1W @ Re): Lm 87.67 dB
• Nominal sensitivity (SPL at 1m for 1W @ Zn): Lnom 88.5 dB
• Root-mean-square fitting error of driver impedance Z(f): rmse Z 3.94 %
• Root-mean-square fitting error of transfer function Hx (f): rmse Hx 2.2 %
• Diaphragm area: Sd 490.87 cm2

Row content