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Rockville W12K9D2 V3 K9 V3 4000W Peak/1000W RMS Car Subwoofer DVC 2-Ohm, Deep Bass, Durable Build, Easy Install, for Car Audio Enthusiasts

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Style: 12” K9 Series 2 Ohm


Features

  • DEEP, POWERFUL BASS:- Delivers 4000W peak and 1000W RMS for rich, distortion-free low frequencies, ideal for car audio systems demanding high-impact sound.
  • DURABLE CONSTRUCTION:- Features a reinforced paper cone, high-density foam surround, and cast aluminum basket for long-lasting performance in tough conditions.
  • DUAL VOICE COIL DESIGN:- 2-ohm DVC offers flexible wiring options, ensuring compatibility with most amplifiers for customized audio setups.
  • EASY INSTALLATION:- Compact 12-inch design with pre-wired terminals simplifies setup, fitting most car subwoofer enclosures seamlessly.
  • VERSATILE APPLICATIONS:- Perfect for car audio enthusiasts, daily commuters, or music lovers seeking immersive bass for any music genre.

Description

The Rockville K9 series has been our best selling series of subs and it just got even better! Say hello to the K9 V3. This sub is a game changer. We improved the performance and cooling like crazy! Our engineers did some minor tweaks that give major results for bassheads who like to abuse subs! Weather you are an every day user or someone who pushes the limits of your equipment the K9 V3 is for you! We made the following upgrades that will keep the voice coil cooler improving the subs ability to take constant abuse. 1. The dustcap was upgraded to the same one we use in our Punisher series. It is top of the line. Sure it increased our cost but we kept the low price the same! 2. We added an inner dustcap that stops heat from building up in the voice coil. We also made our pole vent smaller. The combination of these 2 changes keeps the voice coil significantly cooler when you are playing bass heavy songs or test tones. 3. We added a voice coil spacer that vastly improves the performance. 4. The cone has a smooth finish that allows the dustcap to be glued on more securely.

Specs & Other Info

SpecificationDetails
BrandRockville
Product ModelW12K9D2
Type of SpeakerSubwoofer, Surround Sound, Woofer
Connection MethodWired
Main FeatureShockproof
Intended UseMusic Playback
Subwoofer Size12 Inches
Installation StyleIn-Car Audio
ColorBlack
Dimensions15.2"D x 15.3"W x 12"H
Maximum Output Power4000 Watts
Weight28.67 Pounds
Impedance2 Ohm
WaterproofNo
Control InterfaceVoice Control
Audio OutputSurround Sound
Power SupplyCorded Electric
Compatible withCar Audio Systems
Launch DateMarch 22, 2018
OriginChina

Frequently asked questions

The Rockville W12K9D2 V3 12 K9 V3 subwoofer has a power handling capability of 4000 watts peak and 1000 watts RMS. This means it can handle up to 4000 watts in short bursts and 1000 watts of continuous power, making it suitable for powerful audio setups in vehicles.

Yes, the Rockville W12K9D2 V3 subwoofer is a dual voice coil (DVC) 2-ohm sub, which means it offers flexibility in wiring. It can be wired in parallel to achieve a 1-ohm impedance or in series to achieve a 4-ohm impedance, allowing compatibility with various amplifiers and the ability to optimize the sound system's performance.

The optimal box size for the Rockville W12K9D2 V3 12 K9 V3 subwoofer depends on the type of enclosure you're aiming for. For a sealed box, around 1 to 1.5 cubic feet is recommended. For a ported enclosure, 1.75 to 2.25 cubic feet is ideal. These specifications ensure the best performance and sound quality from the subwoofer.

While the Rockville W12K9D2 V3 12 K9 V3 subwoofer offers high power handling and robust build quality, it's designed primarily for personal vehicle audio enhancements. However, its performance capabilities, including a peak power of 4000 watts, make it a competent option for entry to mid-level competition use, especially when set up and tuned properly within the right system.

Top Amazon Reviews

πŸš€ Abunda's Overview

This is our summary and key points to consider based on customer reviews.


The overall sentiment from the reviews is incredibly positive, with customers highlighting the impressive quality and performance of the subwoofers across various sizes. Many have noted significant improvements to their sound systems, with these subs providing deep bass that can rival more extensive setups. The reviews consistently praise the build quality, sound performance, and the value these subs offer for their price point.

Pros

  • πŸ”Š High-quality sound performance across various music genres
  • πŸ›  Well-built and durable design
  • πŸ’Έ Great value for the price
  • 🎢 Able to produce deep bass without the need for extremely powerful amps
  • πŸ‘Œ Fits well in different vehicle spaces, accommodating for limited space

Cons

  • πŸ“ Some models may require adjustments or modifications for perfect fit
  • πŸ”§ Installation may be challenging for beginners without equipment or experience

Should I Buy It?

If you're seeking to enhance your car's audio system with deep, resonant bass without breaking the bank, these subwoofers come highly recommended. Given the high praise for their sound quality, build, and value, they are a worthwhile investment for both audiophiles and casual listeners. The few cons mentioned are relatively minor and can be easily addressed, making these subs a solid choice for a wide range of users.


  • Awesome speaker
Style: 12” K9 Series 2 Ohm
Have used it for over a year with my Brutus 4000 watt amp pounding it and havent had a problem with it yet.
Reviewed in the United States on July 17, 2025 by Vincent

  • Great budget subwoofer
Style: 12” K9 Series 2 Ohm
Rockville is one of the best budget friendly subs on the market. I am really impressed with the quality of of these subs at price you can get them for. Rockville definately made a customer for life with me and i would recommended anyone to just try them out, you will see for yourself.
Reviewed in the United States on April 26, 2024 by Andy & Stephanie Champion

  • Definitely get this subwoofer
Style: 12” K9 Series 4 Ohm
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

  • Hits hard
Style: 12” K9 Series 4 Ohm
Why did you pick this product vs others?: Hits hard! Sound quality: Sounds good
Reviewed in the United States on July 4, 2025 by harrry mcneil

  • Buy them, Buy 4!
Style: 12” K9 Series 4 Ohm
Undisputed db per dollar champion. Youtubers were paid to hate on them. They are Chinese just like the subwoofers other brands sell for double the money
Reviewed in the United States on July 15, 2025 by Audiose

  • Great buy!
Style: 12” K9 Series 2 Ohm
Sounds great! Fit right in. Good weight. Dvc. All good so far. I don’t care for the spring loaded wire terminals but hey, you can’t complain for the price!!
Reviewed in the United States on October 15, 2020 by Matt

  • 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

  • Poor quality
Style: 12” K9 Series 2 Ohm
Installed and within the first 30 days had blown voice coil not worth the money
Reviewed in the United States on August 2, 2025 by kandi parrett

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