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Rockville W12K9D4 12" 4000w Car Audio Subwoofer Dual 4-Ohm Sub CEA Compliant

SKU:
W12K9D4 RB
$249.00 $91.44
(You save $157.56)
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Condition:
Refurbished
Custom_Condition:
A MANUFACTURER CERTIFIED B-STOCK ITEM. THE PRODUCT WAS TESTED AND IS WORKING LIKE NEW!
Bundle:
No

Warranty Information:

1 YEAR

Out of stock

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 Features of W12K9D4:

  • Rockville W12K9D4 K9 Series 12" Dual 4-Ohm Car Subwoofer
  • Peak Power Handling: 4000 Watts
  • Program Power Handling: 2000 Watts   
  • CEA Rated RMS Power Handling: 1000 Watts 
  • 3" 4-Layer Black Aluminum Voice Coils Wound with OFC Wire Made in USA
  • This voice coil is stable up to 240 degrees celcius! The voice coil windings are made in the USA!
  • Double Stacked 190 Oz High Quality Magnet
  • Cast Aluminum Basket With Black Sanded Finish Makes This Sub Very Efficient And Lighter Weight
  • Two Chrome-Plated Binding Post Terminals
  • Black Non-Pressed Paper Cone With Beautiful Finish
  • Our cones are ultra-stiff. They are thicker and stronger than other subs on the market making our subs able to handle more power.
  • Thick Foam Surround Provides Incredible Sound Quality With Minimal Distortion
  • Red Stitching Cone Reinforcement Ensures Long Life
  • New Ultra-stiff  PolyPropylene (PP) Dustcap
  • Impedance: Dual 4-Ohm Voice Coils
  • Vented Hole on T-yoke Enhances Heat Dissipation
  • Special Custom Rubber Boot Magnet Covers Make the Woofer Look Nice and Protects the Magnet
  • Custom Rockville Mounting Gasket Looks Beautiful and Makes it Easy To Mount the Subwoofer Air-Tight
  • High BL Magnetic Motor Gap
  • We use the highest grade black glue that handles extremely high temperatures which allows our woofer to handle even more power than they are rated
  • Nomex Spider provides tear resistance, strength and long-term reliability over regular cotton and poly cotton spiders
  • Cutout Diameter: 11.13” inches
  • Mounting Depth: 6.85” inches
  • Frequency Response: 33 Hz - 1.5K kHz
  • 10mm T-Yoke + 10mm Washer
  • Sensitivity: 83dB
  • Sealed Enclosure Volume: 0.9 – 1.47 Cubic Feet
  • Vented/Ported Enclosure Volume: 1.8 – 2.75 Cubic Feet
  • XMAX is 28MM
  • Weight: 28.67 Lbs.
  • Shipping Weight: 33 Lbs.
  • Shipping Box Dimensions: 14.57" x 14.57" x 10.83" Inches

Detailed Info:

  • Body: Non-Pressed Paper
  • Gap Plate Inside Diameter: 95mm (3.74 inches)
  • Gap Plate Outside Diameter: 190mm (7.5 inches)
  • Gap Plate Thickness: 25mm (1 inch)
  • Yoke Outside Diameter: 180mm (7.1 inches)
  • Yoke Thickness: 10mm (0.4 inches)
  • Yoke Pole Diameter: 75mm (3 inches)

TS Parameters:

TS Parameter

Wired in Series

Description of Measurement

Electrical Parameters

Re

8 Ohm

Electrical voice coil resistance at DC

Le

5.29 mH

Frequency independent part of voice coil inductance

Res

99.5 Ohm

Resistance due to mechanical losses

fs

31.7 Hz

Drive resonance frequency

Mechanical Parameters

Mms

271.8 g

Mechanical mass of drive diaphragm assembly including air load and voice coil

Rms

9.7 kg/s

Mechanical resistance of total-drive losses

Cms

0.09 mm/N

Mechanical compliance of drive suspension

Bl

28.2 N/A

Force factor (Bl product)

Loss Factors

Qms

5.59

Mechanical Q-factor of of drive in free air considering Rms only

Qes

0.54

Electrical Q-factor of drive in free air considering Re only

Qts

0.50

Total Q-factor considering Re and Rms only

Other Parameters

Vas

38.9 l

Equivalent air volume of suspension

SPL

85.4dB

Diaphragm area

 

1 YEAR
  • UPC:
  • 613815663850

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