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(2) MTX S6512-44 12" 1000 Watt RMS Car Audio Subwoofers+Vented Sub Box Enclosure

(2) S6512-44+RKDV12+K2
$884.84 $659.90
(You save $224.94)
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1225, 1103,

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Items included in this bundle

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Package Includes:

  • (2) MTX 12" Subwoofers Car Audio Sub DVC 4-ohm
  • (1) Rockville Dual 12" Vented Solo Baric L7/L5 S12L7 Car Sub Enclosure Box
  • 20 Drywall Wood Screws (Wood screws are the type of screws; the screws are actually made of metal)
  • 20 Feet of 14 AWG Blue Speaker Wire
  • 4 Spade Terminals

Authorized MTX Audio Dealer!

Description for MTX Subs:

Built for SPL
S65 Series square subwoofers are built to deliver exceptional SPL and the most bass for your buck.

The S6512-44
The S6512-44 is a 12" dual voice coil, 500 Watt, 4-Ohm square subwoofer built on the MTX tradition of getting more than expected.

The S65 Series
The S65 Series is designed for enthusiasts that want to add extreme bass to their system. With more surface area than a standard round subwoofer and patented corner geometry that increases Xmax, the S6512-44 square subwoofer delivers exceptional volume displacement that translates to exceptional SPL. The woofer features dual layer cooling technology with Spider Plateau Venting technology that utilizes the subs movement to cool it as it plays and a radial ribbed t-yoke dissipates heat away from the voice coil through the back plate, so it doesn't overheat even under intense use.

S65 Series Spider Plateau Venting
This square subwoofer also incorporates Spider Plateau Venting which is a mechanical cooling process that targets cool air at the voice coil and a radial ribbed t-yoke that acts as a heat sink effectively managing the subwoofer temperature for long term performance.


  • MTX S6512-44 12" 1000 Watt Peak/500 Watt RMS Square 4-Ohm Car Subwoofer
  • RMS Power Handling: 500 Watts
  • Peak Power Handling: 1000 Watts
  • Recommended Amp Power: 250-500 Watts RMS
  • Impedance: Dual 4-Ohms
  • Frequency Response: 23Hz - 130Hz
  • Sensitivity: 86.7 dB
  • Volume Displacement: 68.47 cu in
  • Voice Coil: 2" inches
  • Mounting Depth: 6.94" inches
  • Cut Out Diameter: 9.13" inches
  • Patented Surround Geometry: Surround Allows for Increased Xmax Resulting In Higher SPL and Volume Displacement
  • Progressive Suspension: Controls Excursion at High Power Reducing Distortion Resulting in Better Sound Quality
  • Spider Plateau Venting: Targets Cool Air at Voice Coil for Improved Thermal Performance
  • Radial Ribbed T-Yoke: Helps Dissipates Heat and Decreases Distortion Improving Sound Quality
  • Product Dimensions: 11.63" x 34" x 12.25" inches
  • Product Weight: 31 Lbs.

Click here for the Installation Guide

Description for Rockville Enclosure:

The RKDV12 is a dual vented square subwoofer box is made in the USA with Grade “A” ¾” MDF wood. This enclosure is made with precision cutting machinery by industry experts that have been making these enclosures in the USA for over 20 years. All Rockville enclosures come with a customized enhanced glue that is unmatched by any other manufacturer. That means that the carpet will stay in place and not rip or tear. The ¾” USA MDF is much stronger then any type of import wood.  This will keep your box performing at an optimal level by not flexing and distorting your woofers. Your woofers will thank you!  EVERY Rockville enclosure is not only glued at all joints but stapled as well. If that wasn’t enough we add a layer of silicon to every seam! This makes your Rockville enclosure rock even more!



  • Rockville RKDV12 Dual 12" Vented/Ported Square Subwoofer Enclosure
  • Designed For Square Subwoofers Such as The Solo Baric L7/L5/L3
  • Machine precision cut mounting holes
  • ¾” USA Heavy Duty MDF Construction
  • Top of the line Glue for extra durable adhesion
  • High quality GOLD spring loaded terminals
  • Designed, tested, and engineered to work perfectly with 12" Kicker Solobaric L5 or L7 subs.
  • Tuning frequency: 39Hz

Enclosure Measurements:

  • Type of Enclosure: Sealed
  • Enclosure Sub Size: Dual 12" Square
  • Dimensions in Inches: 16.25" L x 36" W x 14.5 H"
  • Top and Bottom Depth: 16.25"
  • Mounting Depth: up to NA" (enough depth for any sub on the market)
  • Gross Volume Per Sub (Measurement for the outer dimensions of the box): 2.3 Cubic Feet
  • Net Volume Per Sub (Measurement for the outer dimensions of the box less the thickness of the wood): 1.75 Cubic Feet
About Rockville Quality Control Procedures:

The Rockville brand stands for Quality, Innovation and Value. All Rockville products go through the most rigorous quality control standards in the industry. Products go through months of extensive testing before they reach your hands. All user functions are tested and all internal components are tested for quality. Rockville makes products that are virtually un-breakable! Rockville is one of the only brands in its class to test every concept model for weeks or months before starting production. Once production begins, Rockville sends product engineers to their factory to quality control every line of production. During production every product is tested and on top of that Rockville goes the extra mile and has their high level product engineers do an additional quality control. They test a certain percentage of all products from the production line a second time to ensure that the quality meets their vigorous standards, and to make sure that there is never a batch of products with even a slight problem. All Rockville sub enclosures are backed with a full 90 day warranty, though it is unlikely that you will need to use it.

Complete Dual Subwoofer Enclosure Installation Kit!


  • 20 Drywall Wood Screws (Wood screws are the type of screws; the screws are actually made of metal)
  • 20 Feet of 14 AWG Blue Speaker Wire
  • 4 Spade Terminals

This accessory package includes everything you need to install two subwoofers into an enclosure, and wire your enclosure to your amplifier.  This package is a top of the line accessory package which we put together and tested. 

The drywall wood screws were hand selected by our installation experts because they drill into the enclosure very cleanly, without chipping the enclosure.  The speaker wire is 14 gauge.  This is way better than using 16 gauge.  You can be 100 % sure that your enclosure will have a clean signal to the amplifier with this top of the line speaker wire.  These spade terminals have also been hand selected by our installation experts to make the internal wiring simple, secure, and to run the audio signal cleanly.

  • UPC:
  • 613815842255

WARNING: Cancer and Reproductive Harm —

Car Subwoofer Impedance Wiring Guide

Use our car subwoofer and amp wiring diagrams to figure out which amplifier is compatible with your subwoofer(s) and how to wire it properly.

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