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  1. Home
  2. MTX Store
  3. Discontinued MTX Car Audio & Electronics
  4. Discontinued MTX Car Subwoofers
  5. Discontinued MTX Custom-fit Subwoofer Boxes
  6. Discontinued MTX MTX Thunderform Boxes

Discontinued MTX MTX Thunderform Boxes for your 2011 Grand Vitara close

Transform your vehicle's sound with MTX Thunderform Boxes, designed for a perfect fit.

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RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
Series
Many brands group their products into series or lines of products to help customers know the level of quality (good, better, best for example). You can filter by series and the brand using our guided browsing.
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
Top-Mount Depth (Mounting Depth)
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
Voice Coil(s)
Dual voice coil subs have more wiring flexibility than single voice coils subs; however, single voice coil subwoofers provide easier hookup options for wiring multiple subwoofers in parallel or series. You may also run a dual voice coil (DVC) sub in parallel, series, or combination. A quad voice coil has four voice coils and is equal to two dual voice coil subwoofers as far as wiring goes.
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
Subwoofer Design
This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

Sensitivity
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
  Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
Xmax (millimeters)
Typically measured in millimeters, the Xmax value is the measure of a speaker cone's maximum excursion in one direction while maintaining a linear behavior.
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MTX Audio Thunderform RMP101C-T45 (Charcoal, Loaded)

Ford Ranger Regular Cab 1998-2007, 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

RMP101C-T45 big DISCONTINUED
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MTX Audio Thunderform RMP101C-T45 (Charcoal, Loaded)

Ford Ranger Regular Cab 1998-2007, 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

Single 10" Loaded Vehicle Specific MTX Thunderform Subwoofer Enclosure • For 1998-2007 Ford Ranger Regular Cab • Loaded with Thunder4500 Subwoofer • 450W Max • 225W RMS • 4 ohm • Carbon Filled Polypropylene Cone

No Fit Icon Doesn't fit your Grand Vitara

Single 10" Loaded Vehicle Specific MTX Thunderform Subwoofer Enclosure • For 1998-2007 Ford Ranger Regular Cab • Loaded with Thunder4500 Subwoofer • 450W Max • 225W RMS • 4 ohm • Carbon Filled Polypropylene Cone

MTX Audio Thunderform CS10AG-T45 (Gray, Amplified)

Chevrolet Suburban 1992-2000, Amplified 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

CS10AG-T45 big DISCONTINUED
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MTX Audio Thunderform CS10AG-T45 (Gray, Amplified)

Chevrolet Suburban 1992-2000, Amplified 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

• MTX Thunderform Loaded, Amplified 10" Subwoofer Enclosure
• For 1992-2000 Chevrolet Suburban
• 10" Thunder4500 Subwoofer
• 450W Max
• 225W RMS
• 200 watt Class D built-in amplifier

No Fit Icon Doesn't fit your Grand Vitara

• MTX Thunderform Loaded, Amplified 10" Subwoofer Enclosure
• For 1992-2000 Chevrolet Suburban
• 10" Thunder4500 Subwoofer
• 450W Max
• 225W RMS
• 200 watt Class D built-in amplifier

MTX Audio Thunderform CS10AM-T45 (Maroon, Amplified)

Chevrolet Suburban 1992-2000, Amplified 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

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MTX Audio Thunderform CS10AM-T45 (Maroon, Amplified)

Chevrolet Suburban 1992-2000, Amplified 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

MTX Thunderform Loaded, Amplified 10" Subwoofer Enclosure • For 1992-2000 Chevrolet Suburban • 10" Thunder4500 Subwoofer • 450W Max • 225W RMS • 200 watt Class D built-in amplifier

No Fit Icon Doesn't fit your Grand Vitara

MTX Thunderform Loaded, Amplified 10" Subwoofer Enclosure • For 1992-2000 Chevrolet Suburban • 10" Thunder4500 Subwoofer • 450W Max • 225W RMS • 200 watt Class D built-in amplifier

MTX Audio Thunderform F150R04BK24-T45 (Black, Loaded)

Ford F-150 Regular Cab 2004-2010, 2 12" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

F150R04BK24-T45 big DISCONTINUED
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MTX Audio Thunderform F150R04BK24-T45 (Black, Loaded)

Ford F-150 Regular Cab 2004-2010, 2 12" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

• Dual 12" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2004-2008 Ford F-150 Regular Cab
• Loaded with 12" Thunder4500 Subwoofer
• 900W Max
• 450W RMS
• 4 ohm
• Carbon filled polypropylene cone

No Fit Icon Doesn't fit your Grand Vitara

• Dual 12" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2004-2008 Ford F-150 Regular Cab
• Loaded with 12" Thunder4500 Subwoofer
• 900W Max
• 450W RMS
• 4 ohm
• Carbon filled polypropylene cone

MTX Audio Thunderform F150R04C24-T45 (Charcoal, Loaded)

Ford F-150 Regular Cab 2004-2010, 2 12" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

F150R04C24-T45 big DISCONTINUED
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MTX Audio Thunderform F150R04C24-T45 (Charcoal, Loaded)

Ford F-150 Regular Cab 2004-2010, 2 12" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

• Dual 12" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2004-2008 Ford F-150 Regular Cab
• Loaded with 12" Thunder4500 Subwoofer
• 900W Max
• 450W RMS
• 4 ohm
• Carbon filled polypropylene cone

No Fit Icon Doesn't fit your Grand Vitara

• Dual 12" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2004-2008 Ford F-150 Regular Cab
• Loaded with 12" Thunder4500 Subwoofer
• 900W Max
• 450W RMS
• 4 ohm
• Carbon filled polypropylene cone

MTX Audio Thunderform F250X00BK20-T45 (Black, Loaded)

Ford F-250 Super Cab 2000-2007, 2 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

F250X00BK20-T45 big DISCONTINUED
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MTX Audio Thunderform F250X00BK20-T45 (Black, Loaded)

Ford F-250 Super Cab 2000-2007, 2 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

Dual 10" Loaded MTX Thunderform Sealed Subwoofer Enclosure • For 2000-2007 Ford F-250 Super Cab • Loaded with Thunder4500 Subwoofers • 900W Max • 450W RMS • 4 ohm • Carbon filled polypropylene cone

No Fit Icon Doesn't fit your Grand Vitara

1

Dual 10" Loaded MTX Thunderform Sealed Subwoofer Enclosure • For 2000-2007 Ford F-250 Super Cab • Loaded with Thunder4500 Subwoofers • 900W Max • 450W RMS • 4 ohm • Carbon filled polypropylene cone

MTX Audio Thunderform FMUST05DK12-T45 (Black, Loaded)

Ford Mustang 2005-2008, 12" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

FMUST05BK12-T45 big DISCONTINUED
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MTX Audio Thunderform FMUST05DK12-T45 (Black, Loaded)

Ford Mustang 2005-2008, 12" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

• Single 12" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2005-2008 Ford Mustang
• Loaded with Thunder4500 Subwoofer
• 450W Max
• 225W RMS
• 4 ohm
• Carbon filled polypropylene cone

No Fit Icon Doesn't fit your Grand Vitara

1

• Single 12" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2005-2008 Ford Mustang
• Loaded with Thunder4500 Subwoofer
• 450W Max
• 225W RMS
• 4 ohm
• Carbon filled polypropylene cone

MTX Audio Thunderform F150C09FB10A-TN (Black, Amplified)

Ford F-150 SuperCrew Cab 2009-2010 Amplified & Loaded 10" Subwoofer Enclosure

F150C09FB10A-TN big DISCONTINUED
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MTX Audio Thunderform F150C09FB10A-TN (Black, Amplified)

Ford F-150 SuperCrew Cab 2009-2010 Amplified & Loaded 10" Subwoofer Enclosure

• Amplified 10" Subwoofer Enclosure
• Fits in Ford F-150 SuperCrew Cab 2009-2010
• 400W Max
• 200W RMS
• Fiberglass Construction
• Built-in BTL Amplifier
• 28oz. Magnet
• Enclosure Volume: 1.0 Cubic Ft

No Fit Icon Doesn't fit your Grand Vitara

4

• Amplified 10" Subwoofer Enclosure
• Fits in Ford F-150 SuperCrew Cab 2009-2010
• 400W Max
• 200W RMS
• Fiberglass Construction
• Built-in BTL Amplifier
• 28oz. Magnet
• Enclosure Volume: 1.0 Cubic Ft

MTX Audio Thunderform F150R04BK24A-TN (Black, Amplified)

Ford F-150 Regular Cab 2004-2010, Amplified 2 12" 4 ohm Loaded Car Specific Thunderform Sub Enclosure

F150R04BK24A-TN big DISCONTINUED
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MTX Audio Thunderform F150R04BK24A-TN (Black, Amplified)

Ford F-150 Regular Cab 2004-2010, Amplified 2 12" 4 ohm Loaded Car Specific Thunderform Sub Enclosure

• Dual 12" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2004-2008 Ford F-150 Regular Cab
• Loaded with 12" Terminator Series Subwoofers
• 800W Max
• 400W RMS
• 4 ohm
• Polypropylene Cone

No Fit Icon Doesn't fit your Grand Vitara

• Dual 12" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2004-2008 Ford F-150 Regular Cab
• Loaded with 12" Terminator Series Subwoofers
• 800W Max
• 400W RMS
• 4 ohm
• Polypropylene Cone

MTX SFRS13FB10-TN

Fits Select 2013-2016 Subaru/Scion Vehicles - 10" 200W Loaded Thunderform Subwoofer Enclosure - Black

SFRS13FB10-TN big DISCONTINUED
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MTX SFRS13FB10-TN

Fits Select 2013-2016 Subaru/Scion Vehicles - 10" 200W Loaded Thunderform Subwoofer Enclosure - Black

• 200W Single 10" Sealed Subwoofer Enclosure
• RMS: 200 W Total
• 10" Sealed Vehicle Specific Enclosure
• Preloaded with single 10" Terminator-Series Subwoofer
• Sealed enclosure with factory finish - Black

No Fit Icon Doesn't fit your Grand Vitara

• 200W Single 10" Sealed Subwoofer Enclosure
• RMS: 200 W Total
• 10" Sealed Vehicle Specific Enclosure
• Preloaded with single 10" Terminator-Series Subwoofer
• Sealed enclosure with factory finish - Black

MTX Audio Thunderform FRP20G-T45 (Gray, Loaded)

Ford F-150 Regular Cab 1997-2003, 2 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

FRP20G-T45 big DISCONTINUED
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MTX Audio Thunderform FRP20G-T45 (Gray, Loaded)

Ford F-150 Regular Cab 1997-2003, 2 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

Dual 10" Loaded MTX Thunderform Sealed Subwoofer Enclosure • For Ford F-150 Regular Cab 1997-2003 • Loaded with 10" Thunder4500 Subwoofers • 900W Max • 450W RMS • 4 ohm • Carbon filled polypropylene cone

No Fit Icon Doesn't fit your Grand Vitara

Dual 10" Loaded MTX Thunderform Sealed Subwoofer Enclosure • For Ford F-150 Regular Cab 1997-2003 • Loaded with 10" Thunder4500 Subwoofers • 900W Max • 450W RMS • 4 ohm • Carbon filled polypropylene cone

MTX Audio Thunderform FRP20T-T45 (Tan, Loaded)

Ford F-150 Regular Cab 1997-2003, 2 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

FRP20T-T45 big DISCONTINUED
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MTX Audio Thunderform FRP20T-T45 (Tan, Loaded)

Ford F-150 Regular Cab 1997-2003, 2 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

Dual 10" Loaded MTX Thunderform Sealed Subwoofer Enclosure • For Ford F-150 Regular Cab 1997-2003 • Loaded with 10" Thunder4500 Subwoofers • 900W Max • 450W RMS • 4 ohm • Carbon filled polypropylene cone

No Fit Icon Doesn't fit your Grand Vitara

Dual 10" Loaded MTX Thunderform Sealed Subwoofer Enclosure • For Ford F-150 Regular Cab 1997-2003 • Loaded with 10" Thunder4500 Subwoofers • 900W Max • 450W RMS • 4 ohm • Carbon filled polypropylene cone

MTX Audio Thunderform JWTJ97G20-T45 (Gray, Loaded)

Jeep Wrangler TJ 1997-2006, 2 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

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MTX Audio Thunderform JWTJ97G20-T45 (Gray, Loaded)

Jeep Wrangler TJ 1997-2006, 2 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

Dual 10" Loaded Vehicle Specific Thunderform Subwoofer Enclosure • 1997-2006 Jeep Wrangler TJ • Loaded with Thunder4500 Subwoofer • 900W Max • 450W RMS • 4 ohm • Carbon Filled Polypropylene Cone

No Fit Icon Doesn't fit your Grand Vitara

Dual 10" Loaded Vehicle Specific Thunderform Subwoofer Enclosure • 1997-2006 Jeep Wrangler TJ • Loaded with Thunder4500 Subwoofer • 900W Max • 450W RMS • 4 ohm • Carbon Filled Polypropylene Cone

MTX Audio Thunderform NTTNK04C20-T45 (Charcoal, Loaded)

Nissan Titan King Cab 2004-2008, 2 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

NTTNK04C20-T45 big DISCONTINUED
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MTX Audio Thunderform NTTNK04C20-T45 (Charcoal, Loaded)

Nissan Titan King Cab 2004-2008, 2 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

Dual 10" Loaded Vehicle Specific Thunderform Subwoofer Enclosure • For 2004-2008 Nissan Titan King Cab • Loaded with Thunder4500 Subwoofer • 900W Max • 450W RMS • 4 ohm • Carbon Filled Polypropylene Cone

No Fit Icon Doesn't fit your Grand Vitara

Dual 10" Loaded Vehicle Specific Thunderform Subwoofer Enclosure • For 2004-2008 Nissan Titan King Cab • Loaded with Thunder4500 Subwoofer • 900W Max • 450W RMS • 4 ohm • Carbon Filled Polypropylene Cone

MTX Audio Thunderform NTTNK04G20-T45 (Gray, Loaded)

Nissan Titan King Cab 2004-2008, 10" 2 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

NTTNK04G20-T45 big DISCONTINUED
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MTX Audio Thunderform NTTNK04G20-T45 (Gray, Loaded)

Nissan Titan King Cab 2004-2008, 10" 2 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

Dual 10" Loaded Vehicle Specific Thunderform Subwoofer Enclosure • For 2004-2008 Nissan Titan King Cab • Loaded with Thunder4500 Subwoofer • 900W Max • 450W RMS • 4 ohm • Carbon Filled Polypropylene Cone

No Fit Icon Doesn't fit your Grand Vitara

Dual 10" Loaded Vehicle Specific Thunderform Subwoofer Enclosure • For 2004-2008 Nissan Titan King Cab • Loaded with Thunder4500 Subwoofer • 900W Max • 450W RMS • 4 ohm • Carbon Filled Polypropylene Cone

MTX Audio Thunderform CXP20AT-T45 (Tan, Amplified)

Chevrolet Extra Cab 1999-2006, Amplified 2 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

CXP20AT-T45 big DISCONTINUED
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MTX Audio Thunderform CXP20AT-T45 (Tan, Amplified)

Chevrolet Extra Cab 1999-2006, Amplified 2 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

• Dual 10" Loaded Amplified Thunderform Subwoofer Enclosure
• For 1999-2006 Chevrolet Extra Cab
• Also Fits 1999-2001 GMC Pick-Up Extended Cab
• 900W Max
• 450W RMS
• Built-in 200W Amplifier

No Fit Icon Doesn't fit your Grand Vitara

• Dual 10" Loaded Amplified Thunderform Subwoofer Enclosure
• For 1999-2006 Chevrolet Extra Cab
• Also Fits 1999-2001 GMC Pick-Up Extended Cab
• 900W Max
• 450W RMS
• Built-in 200W Amplifier

MTX Audio Thunderform DRQC20AT-T45 (Tan, Amplified)

Dodge Ram Quad Cab 2002-2008, Amplified 2 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

DRQC20AT-T45 big DISCONTINUED
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MTX Audio Thunderform DRQC20AT-T45 (Tan, Amplified)

Dodge Ram Quad Cab 2002-2008, Amplified 2 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

Dual 10" Loaded Amplified MTX Thunderform Subwoofer Enclosure • For Dodge Ram Quad Cab 2002-2008 • Loaded with Dual Thunder4500 Subwoofers • 900W Max • 450W RMS • 4 ohm • Carbon filled polypropylene cone

No Fit Icon Doesn't fit your Grand Vitara

1

Dual 10" Loaded Amplified MTX Thunderform Subwoofer Enclosure • For Dodge Ram Quad Cab 2002-2008 • Loaded with Dual Thunder4500 Subwoofers • 900W Max • 450W RMS • 4 ohm • Carbon filled polypropylene cone

MTX Audio Thunderform F150R04T24A-T45 (Tan, Amplified)

Ford F-150 Regular Cab 2004-2008, Amplified 2 12" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

F150R04T24A-T45 big DISCONTINUED
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MTX Audio Thunderform F150R04T24A-T45 (Tan, Amplified)

Ford F-150 Regular Cab 2004-2008, Amplified 2 12" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

• Dual 12" Amplified Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2004-2008 Ford F-150 Regular Cab
• Loaded with 12" Thunder4500 Subwoofer
• 900W Max
• 450W RMS
• 4 ohm
• Carbon filled polypropylene cone

No Fit Icon Doesn't fit your Grand Vitara

• Dual 12" Amplified Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2004-2008 Ford F-150 Regular Cab
• Loaded with 12" Thunder4500 Subwoofer
• 900W Max
• 450W RMS
• 4 ohm
• Carbon filled polypropylene cone

MTX Audio Thunderform FZX3500C12A-TN (Charcoal, Amplified)

Ford Focus ZX5 / ZX3 2000-2007, Amplified 12" 4 ohm Loaded Car Specific Thunderform Sub Enclosure

FZX3500C12A-TN big DISCONTINUED
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MTX Audio Thunderform FZX3500C12A-TN (Charcoal, Amplified)

Ford Focus ZX5 / ZX3 2000-2007, Amplified 12" 4 ohm Loaded Car Specific Thunderform Sub Enclosure

• Amplified Single 12" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2000-2007 Ford Focus ZX5 / ZX3
• Loaded with 12" Terminator Series Subwoofer
• 400W Max
• 200W RMS
• 4 ohm
• Polypropylene Cone

No Fit Icon Doesn't fit your Grand Vitara

• Amplified Single 12" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2000-2007 Ford Focus ZX5 / ZX3
• Loaded with 12" Terminator Series Subwoofer
• 400W Max
• 200W RMS
• 4 ohm
• Polypropylene Cone

MTX Audio Thunderform DRXP20C-TN (Charcoal, Loaded)

Dual Loaded 10" Subwoofer Enclosure for 1994-2001 Dodge Ram Extended Cab

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MTX Audio Thunderform DRXP20C-TN (Charcoal, Loaded)

Dual Loaded 10" Subwoofer Enclosure for 1994-2001 Dodge Ram Extended Cab

• Under Rear Seat On Driver Side: Bolts To Vehicle w/Supplied Hardware
• For 1994-2001 Dodge Ram Extended Cab
• 10" Terminator Series Subwoofers
• 800W Max
• 400W RMS
• Polypropylene Cone
• 4 Ohm Impedance

No Fit Icon Doesn't fit your Grand Vitara

• Under Rear Seat On Driver Side: Bolts To Vehicle w/Supplied Hardware
• For 1994-2001 Dodge Ram Extended Cab
• 10" Terminator Series Subwoofers
• 800W Max
• 400W RMS
• Polypropylene Cone
• 4 Ohm Impedance

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