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Rockville

Rockville W12K9D4 V3 K9 4000W Peak/1000W RMS Car Subwoofer DVC 4-Ohm, Deep Bass, Durable Build, High Power Handling, for Car Audio Enthusiasts

  • Based on 568 reviews
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Availability: Only 4 left in stock, order soon!
Fulfilled by Amazon
Arrives Wednesday, Aug 20
Order within 14 hours and 7 minutes
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Style: 12” K9 Series 4 Ohm


Features

  • POWERFUL AUDIO PERFORMANCE:- Delivers 4000W peak and 1000W RMS for booming, distortion-free bass that fills any vehicle with rich, immersive sound.
  • DUAL VOICE COIL DESIGN:- Features a 4-ohm dual voice coil for flexible wiring options, ensuring compatibility with various car audio amplifiers and setups.
  • DURABLE CONSTRUCTION:- Built with a reinforced paper cone, high-density foam surround, and heat-resistant aluminum voice coil for long-lasting reliability.
  • OPTIMIZED FOR DEEP BASS:- Engineered with a large magnet structure and extended pole piece to produce tight, low-frequency bass ideal for music genres like hip-hop and EDM.
  • EASY INSTALLATION:- Includes a detailed manual and mounting hardware, making it simple to integrate into sealed or ported enclosures for custom car audio systems.

Description

Features: 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 (100% Copper) Wire Made in Japan The CCAW Wire we use is made in Japan. It is one of the most important components to make the sub high quality and last longer. (Most subs on the market use wire made in China which can not handle nearly as high temperatures as our wire that is made in Japan) Double Stacked 190 Oz High Quality Magnet Cast Aluminum Basket With Black Sanded Finish Makes This Sub Very Efficient And Lighter Weight 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 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: 0.8 - 1.25 Cubic Feet Vented/Ported Enclosure Volume: 1.75 - 3.0 Cubic Feet Weight: 28.67 Lbs. Shipping Weight: 33 Lbs. Shipping Box Dimensions: 14.57" x 14.57" x 10.83" Inches TS Parameters: Fms: 35.7 Hz Res: 89.4 Ohm Re: 7.6 Ohm Qms: 4.60 Qes: 0.61 Qts: 0.54 Rms: 11.8kg/s Cms: 0.08mm/N Mms: 242.4 gr Nref: 0.22% Bl: 26.1N/A SPL: 85.3dB VAS: 30.0 L Rp: 53.7 Ohm LP: 48.8mH CP: 499.5uF Le: 3.28mH

Brand: Rockville


Speaker Maximum Output Power: 4000 Watts


Frequency Response: 1500 KHz


Connectivity Technology: Wired


Audio Output Mode: Surround


Mounting Type: Car Mount


Model Name: W12K9D4


Speaker Type: Subwoofer


Recommended Uses For Product: car


Compatible Devices: Laptop, Desktop, Television, MP3 Player


Subwoofer Diameter: 12 Inches


Unit Count: 1.0 Count


Controller Type: Voice control


Surround Sound Channel Configuration: 3.0


Color: Black


Product Dimensions: 15.2"D x 15.4"W x 12.2"H


Item Weight: 32 Pounds


Impedance: 4 Ohm


Is Waterproof: FALSE


Warranty Type: Limited


Number of Items: 186


Control Method: Voice


Speaker Size: 12 Inches


Power Source: Corded Electric


Woofer Diameter: 12 Inches


Vehicle Service Type: Car


Audio Driver Type: Dynamic Driver


Audio Driver Size: 12 Inches


Subwoofer Connectivity Technology: Wired


Connectivity Protocol: wired


Includes MP3 player?: No


Processor Count: 1


UPC: 819216020531


Style: 12” K9 Series 4 Ohm


Global Trade Identification Number: 31


Manufacturer: Rockville


Item Weight: 32 pounds


Item model number: W12K9D4


Is Discontinued By Manufacturer: No


Date First Available: March 21, 2018


Department: vehicle-subwoofers


Country of Origin: China


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Aug 20

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Definitely get this subwoofer
Style: 12” K9 Series 4 Ohm
Review Image by Ryan McGinnis Ryan McGinnis
Review Image by Ryan McGinnis Ryan McGinnis
What is this thing hit if you put it in the right ported box you will shake the heck out of anything you put it in very impressed and for the price holy cow can't beat that
Reviewed in the United States on May 6, 2025 by Ryan McGinnis Ryan McGinnis
    • Only music lovers will understand
Style: 12” K9 Series 4 Ohm
I brought these speaker for my husband and I didn't regret it a bit it is the neatest speakers I've seen and the best we've brought it's very loud the base is very powerful I will recommend this to any music lovers.
Reviewed in the United States on May 1, 2025 by Davia
    • So far so good
Style: 12” K9 Series 4 Ohm
Review Image by Cam Cam
Very powerful. I have a headache
Reviewed in the United States on April 20, 2025 by Cam Cam
    • It'll make your eyeballs rattle & knock free any lung butter you were saving for a special occasion!
Style: 12” K9 Series 2 Ohm
I have this sub in a QBomb side ported box with bedliner and it's powered by the Rockville RDX-M1, the same amp I used to power the W12K6D2 (dual 2 ohm) that I was replacing. The difference between the two subs is night and day. The K6 in the same box would vibrate my nose hairs a little bit and shook the mirrors too. This K9 serie though, it vibrate every hair on my body. Even using an underpowered amp I have to turn the bass knob to zero so I can read street signs. This thing vibrates my freaking eyeballs. That's using an amp that's only rated at 500 RMS CEA rated. Best part is I didn't have to pay for the sub and no they didn't give it to me. Amazon doesn't accept returns but they will return your $ and tell you to donate it or toss it in the trash. Before it was delivered I planned on sending it back and planned on buying a Rockville Destroyer 12D2 12" instead. I'm glad I didn't because this sub in the Qbomb box with a way under powered amp is still in my top 2 subset ups I've owned and I've always bought name brand stuff never owned anything named BOSS or AudioPipe I was a Rockford Fosgate (best of their line stuff dating back to the 90's) but I really liked my 12" Kicker L7 paired with a 1000 watt 1000.1 kicker amp that was my best set up but it cost over $100 for the entire set up, self installed. You can get near the performance from this sub,a QBOMB side ported bx and a entry level M-1 series Rockville amp with 4 gauge install kit, upgrade the fuse to a circuit breaker, wire reducers (into the amp), banana plugs(into the amp & box terminals for under $37. If your building a system from scratch I would suggest buying the IGNITE R300/1D amp instead of a Rockville, it's $104 & $23 for a 3 yr warranty but for that $125 your going to get an amp that puts out like a prom date. Check youtube for the DYNO drag race, this IGNITE amp puts out 1100 watts (cea certified) at 1 ohm on the DYNO and 1122 watts uncertified. I know your saying I'm not buying some amp I never heard of but do yourself a favor and watch the youtube video and buy the 3 year protection plan and get a worry free 3 years of bass that will knock the dingleberries off your asss. ... show more
Reviewed in the United States on September 7, 2019 by RC Renegades Ghost Maker 101
    • great starting sub
Style: 12” K9 Series 4 Ohm
I got this subwoofer about a year ago. looks great, sound quality is a bit off, but it is probably from my amplifier quality! I've heard from many people the voice coil glue was bad, but i haven't pushed mine too bad. i was going to do a warranty claim, but i can deal with the smell. not too bad. id definitely buy Rockville again! Plus im gonna get a free t-shirt!! ... show more
Reviewed in the United States on May 21, 2019 by justin s.
    • Bang'n
Style: 12” K9 Series 4 Ohm
woah! This thing bang hard af.... looks like ima have to around and tighten up bolts in my ride... didn't realize it was this beefy but it still go hard with the Lil amp I got on it.... all in all 1000%satisfied fr!
Reviewed in the United States on December 23, 2024 by Hyunglo
    • Awesome bang for the buck!
Style: 12” K9 Series 2 Ohm
Review Image by josh allums josh allums
Review Image by josh allums josh allums
I have a single 12 k9 d2 in a 2.2 cubic ft box tuned to about 33hz running in a Rockford prime 750 (820 actual watts). This thing slams! I have visible flex on all 4 doors. If you can find a sub for less than 115 dollars shipped to my door that can do that then I’m all ears. It’s also built like a tank. I recently installed a pair of sundown sa 12’s and honestly the build quality is similar. It’s hard to compare sound between the 2 because the sundown setup was dual 12s but I think the k9 holds it’s own, and considering the sundowns cost almost twice the price. Also thought it worth mentioning that the first model of the k9 did have an issue with the glue and the dust caps were a little flexible. The model on amazon now are the new and improved version. on the box it says the glue is a high temp version and that the dust cap is “ultra stiff” and it is! Don’t go by the description for the box size it’s way to small. The manual that came with the box says 1.8 to 2.75 cubes. I kinda split the difference at 2.2 and it sounds really good. But generally the bigger you go the more efficient it becomes and the louder and deeper it will hit. I will update if anything happens in the future but as of right now I’m very satisfied! ... show more
Reviewed in the United States on January 19, 2019 by josh allums josh allums
    • Sounds wrong
Style: 12” K9 Series 2 Ohm
The frequency response starts at 33Hz? Didn't see that when I bought it.. returning them for sure. Sounds weird at lower frequency of you like old disco type crap these are right for you. Update, hooked them up to a 2000 watt CT sound amp. 1 speaker each. So it should have been 2000watt to each sub... they lasted about 30 minutes! So that being known, I seriously doubt CT sound amps are actually 2000 watt (they're the same thing as scar audio) they can not handle 2000 watt.. let alone the 4k they claim. Pass these by, even for a budget build. High frequency response for a sub and they can't take half of their claimed power. ... show more
Reviewed in the United States on June 24, 2022 by Joshua Willis

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