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MTX ThunderForm Vehicle-Specific Sub-Woofer Enclosures

Transform your car audio system and and see what you've been missing with MTX Thunderform Vehicle specific sub enclosures.
MTX Thunderforms - The original vehicle specific subwoofer enclosures

We're happy to announce the addition of MTX Thunderforms "the original vehicle specific enclosures". Each Thunderform enclosure is loaded with (either a single or dual) T-4500 Subwoofers. Many models have an amplified counterpart which simplifies the installation to take your system from "stock to rock"! The material in ThunderForm enclosures is a high density polyethylene resin, which is resilient enough to transform into various shapes, yet rigid enough to avoid flexing. It also has enough density to dampen any resonance. They're available in a variety of colors to match the interior of your particular vehicle and so you don't have to compromise its cosmetic integrity. This is especially nice for those who lease their vehicles and want to enjoy added bass without the added hassle of messy installations. 

Each amplified enclosure features:

  • Highly efficient, on-board, rugged, 200 watt Class-D amplifier
  • Unique, custom-designed subwoofer complements the efficiency of the Class-D amplifier to deliver deep, low bass
  • "Electronic Bass Control" (EBC) so the bass level can be adjusted from the driver's seat.
  • Line Level and Speaker inputs with "Smart-Engage"


Get the custom look and sound you're looking for


Vehicle Specific MTX Thunderfom Subwoofer Enclosures for GMC Vehicle Specific MTX Thunderfom Subwoofer Enclosures for Dodge Vehicle Specific MTX Thunderfom Subwoofer Enclosures for Ford
Vehicle Specific MTX Thunderfom Subwoofer Enclosures for Honda Vehicle Specific MTX Thunderfom Subwoofer Enclosures for Jeep Vehicle Specific MTX Thunderfom Subwoofer Enclosures for Mazda
Vehicle Specific MTX Thunderfom Subwoofer Enclosures for Volkswagen Vehicle Specific MTX Thunderfom Subwoofer Enclosures for Toyota Vehicle Specific MTX Thunderfom Subwoofer Enclosures for Isuzu

All enclosures are in stock and are ready to be shipped.

Everyone Loves: Polk Audio db Series Car Subwoofers

Polk Audio db Series car subwoofers. High quality, low cost.

Polk Audio's db Series car audio subwoofers have been a big hit since they were added to our product line-up and it's no surprise! The db series subs are the perfect balance of cost and quality and feature single and dual voice coil version in 8", 10" and 12" sizes. 

 Polk Audio db Series Car Subwoofers

Model Size Voice Coils RMS
db840 8" 4-Ohm 180W
db840 DVC 8" Dual 4-Ohm 180W
db1040 10" 4-Ohm 270W
db1040 DVC 10" Dual 4-Ohm 270W
db1240 12" 4-Ohm 360W
db1240 DVC 12" Dual 4-Ohm 360w

  • Single and Dual Voice Coil subwoofers are optimized for high performance in virtually any enclosure type: sealed, vented and band pass.
  • Wrap-around Rubber Gasket seals the sub in your enclosure for airtight performance.
  • State-of-the-art laser-based Klippel measurement technology perfectly centers the subwoofer's voice coil in the magnetic field, improving X-max and BL linearity, and the sub's micro and macro dynamics, for deep, precise, bass!
  • Black Matt-finish Composite Cones are unbelievably stiff for real gut-pounding bass.
  • Injection molded ABS dust cap also stiffens the cone to suppress unwanted resonance for incredible low distortion, high impact bass response.
  • Big beefy magnet structure and motor assembly for high output bass with tight control.
  • Durable Butyl Rubber Surround for consistent, reliable performance.
  • Four-layer vented voice coil runs cool while your music stays hot.
  • Vented pole piece for higher efficiency and ultra-high power handling.
  • Fast-On wire terminals for quick, secure hookups.


John Hone Demo of MB Quart PWH 302 with Hifonics XXV Cyclops

The unbelievable power of MB Quart Subwoofers with a Hifonics competition amplifier.

Maxxsonics Power!

Ever wondered what kind of damage you could do with MB Quart sound quality car subwoofers and a Hifonics car amplifier from Maxxsonics?

Check out this killer video of John Hone pulling off the gloves with 16 MB Quart PWH 302 subs and a Hifonix XXV Cyclops amp. 

TS-SW2501S4 & TS-SW3001S4 Shallow Mount Subs by Pioneer

Take a look at the recently released TS-SW2501S4 & TS-SW3001S4 shallow car subwoofer drivers by Pioneer

Pioneer TS-SW2501S4 & TS-SW3001S4 Shallow Mount Car Subwoofers

These shallow subwoofers from Pioneer Electronics require have a mere 3" to 3-1/4" mounting depth and are designed to perform with as little as 0.5cu. ft. of air space. Many would assume that these car audio/stereo subwoofers don't perform as well as a standard subwoofer simply because of the size, but if you're willing to give them a try; you're in for a big surprise.

The TS-SW2501S4 (10 inch) and TS-SW3001S4 (12 inch) subwoofer feature Pioneer's patented Air Suspension Control System which provides extremely precise bass response. In addition the cones feel extremely sturdy due to the basalt/carbon fiber reinforced IMPP used in it's construction.

TS-SW2501S4 & TS-SW3001S4
TS-SW2501S4 - 10" 1200W 4-Ohm Subwoofer TS-SW3001S4 - 12" 1500W 4-Ohm Subwoofer
  • 1200W Max
  • 300W RMS
  • Frequency Response: 20 ~ 290Hz
  • Sensitivity: 90dB
  • Ohm Rating: S2 (2 ohm) S4 (4 ohm)
  • Recommended Enclosure: 0.35 ~ 0.7 Cubic Feet
  • Dimensions: 11" x 3-5/8"
  • Mounting Depth: 3"
  • 1500W Max
  • 400W RMS
  • Frequency Response: 20 ~ 230Hz
  • Sensitivity: : 93dB
  • Recommended Enclosure: 0.5 ~ 1.0 Cubic Feet
  • Dimensions: 13" x 3-7/8"
  • Mounting Depth: 3-1/4"

Infinity Reference Subwoofers - 1062w, 1262w, 1060w, 1260w

New 2009 Reference Series - Subwoofers - 1062w, 1262w, 1060w, 1260w

The new infinity reference subwoofers are now in stock and ready to ship!



Infinity Reference 1060w
  • Sensitivity: 91 dB
  • RMS Power Range : 275 Watts
  • Peak Power Handling: 1100 Watts
  • Impedance: 4 Ohm
  • Low Frequency response: 25 Hz
  • High Frequency Response: 400 Hz
  • Diameter: 10 Inch
Infinity Reference 1260w
  • Sensitivity: 93 dB
  • RMS Power Range : 300 Watts
  • Peak Power Handling: 1200 Watts
  • Impedance: 4 Ohm
  • Low Frequency response: 25 Hz
  • High Frequency Response: 400 Hz
  • Diameter: 12 Inch
Infinity Reference 1062w
  • Sensitivity: 94 dB
  • RMS Power Range : 275 Watts
  • Peak Power Handling: 1100 Watts
  • Impedance: Dual 4 Ohm
  • Low Frequency response: 25 Hz
  • High Frequency Response: 400 Hz
  • Diameter: 10 Inch
Infinity Reference 1262w
  • Sensitivity: 93 dB
  • RMS Power Range : 300 Watts
  • Peak Power Handling: 1200 Watts
  • Impedance: Dual 4 Ohm
  • Low Frequency response: 25 Hz
  • High Frequency Response: 400 Hz
  • Diameter: 12 Inch

Kenwood KFC-W3012 Car Subwoofer - Low Cost, High Performance.

Kenwood KFC-W3012 Car Subwoofer - A Great Subwoofer at a great price!
If you're in the market for great subwoofers at a price you can't beat, take a look at the Kenwood KFC-W3012 component car subwoofer driver. The KFC-W3012 has been redesigned to out perform it's predecessor to last year’s KFC-W3011.  

C-Dawg From Lbk TX
I have these in a ported box tuned to 38hz with an internal volume of 2.01 cubic feet. They’re mounted inward on top of the box so everyone can see the magnets, with the ports pointing towards the back. I built the box myself for my '00 Montero Sport, separate chambers with cross bracing and double sheet baffle of 3/4inch MDF. Right now I'm still breaking them in pushing only 120watts to each speaker. After break-in period of 50hrs, I will bridge my amps. Using Blaupunkt PCA2120 amps, 1 per sub, 300watts RMS w/350 max dynamic. 

Nathan Weyls From Springfield IL 

This is the 2009 version of the 3011's with improved cone designs. Thanks for free upgrade OCS... I'm not going to tell you these are the best subs in the world because they aren't, but I will tell you they are amazing for the price. They are very fast and pick up a good range. They hit very hard. When I first wired these baby's up I was very surprised. I am more than happy with them. These can blow away many sub-woofers that cost double the price. If you just want some good loud base for a cheap price this is the perfect sub for you. Also OCS's price was very good. At my local electronics store these subs retail for $140.00 plus tax. 

Cadence Car Audio - At OnlineCarStereo.com

Cadence car audio/stereo at onlinecarstereo.com

OnlineCarStereo.com is proud to announce that we have added Cadence Car Audio to our extensive list of fully authorized product lines.

Unlike many of the Car Audio brands available on the market today, Cadence prides itself on true and accurate power ratings. Though Cadence isn't one of the more well known brands, enthusiasts who are looking for the highest quality without being required to pay the highest prices know that Cadence is definitely the way to go.

No industry hype.

Simply some of the best car audio gear you can find!





Cadence ZRS6K Component Speaker System
5 Stars by Adrian From el paso texas. 
Really impressed with these. usually wouldnt go with a brand like this(im a fosgate guy) but the price, you just have to give these a chance. The crossover is great. Put the 6 1/2 in my doors and it gives the front of my car a really good lows up front and the tweeters are as clear and loud as can be. Running these of a rockford 600.4 and its like hearing angels sing when these crank up. Would definately recommend. note give these babies a good 2 or 3 days to break in.


Cadence ZRS-8000D 4500W Mono Block D-Class Amplifier
5 Stars by Mike from Gtown. 
Very good amp, I can power any of my subs from my 13w7 to my 3 alpine TypeR 15's. I've had their subs, they have huge magnets. Good n upcoming brand.

Soundstream Car Audio Coupon Savings

Soundstream Car Audio Coupon Savings
Soundstream has been the leader in mobile audio engineering and performance for the past 20 years. The vision has remained constant throughout this period. "Bold engineering and unconventional thinking will bring out nothing but the best in both our product and our people". This vision has earned Soundstream over 90 industry awards for innovation and performance.

 Use this coupon code at checkout to receive an 8% discount when you spend $250 on any of our Soundstream products including new 2009 models like:


Soundstream Stealth-13 Car Subwoofer


  • Proprietary cast aluminum basket
  • Inverted motor assembly
  • Solid aluminum cone
  • 2" mounting depth
  • 5" voice coil
  • 12 ga. direct wire terminal
  • Aluminum voice coil former
  • Semi-circular basket for venting
  • Optimized for a sealed enclosures
  • Cutout diamiter: 11.375"



Soundstream DTower Series Subwoofer Amplifiers


  • Power output:
    • 900 Watts RMS x 1 @ 2 ohms
    • 1400 Watts RMS x 1 @ 1 ohms
  • The worlds first vertical automotive stereo amplifier
  • Gloss black finish w/ brushed accents
  • Double sided pcb w/ smd components
  • aluminum alloy heat-sink