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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 1987 XJS close

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

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Product Type
Vehicle-specific loaded sub box,
Price Range
Number of Subwoofers
This value represents the number of subwoofers that the enclosure accommodates or that are included in the package or bundled kit.
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
Box Type
Represents the style of the enclosure. Be sure to purchase the appropriate enclosure type and internal volume that will be compatible with your subwoofer's recommendation.

Sealed - Sealed boxes are those that have no holes or vents in it. The only hole in a sealed box is where the subwoofer is installed. Smaller sealed boxes require more power than a larger sealed box. They provide a tight, accurate bass, while the larger sealed enclosures provide a "boomier" and louder bass.

Ported / Vented - Ported/Vented Enclosures provide an even boomier, louder bass, but less accurate then a small, sealed box. Ported enclosures typically require more airspace per sub and also less power output from an amplifier to perform correctly.

Bandpass - Bandpass enclosures make subwoofers perform efficiently, but loose. The bass is not as "boomy" as a ported enclosure nor as punchy as a sealed enclosure. Bandpass enclosures work well with lower to mid-level subwoofers.
Type of Enclosure
Some of our Vehicle Specific enclosures are loaded with a subwoofer and an amplifier, some are only loaded with a subwoofer, while some are empty boxes.
Total Peak Power Handling
This is the Total Peak Power handling of all the subwoofers included in the package or enclosure.

If the loaded enclosure or amplifier and subwoofer package includes more than a single subwoofer, then this is the total peak power handling for all of the subs combined.

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.
Total RMS Power Handling
This is the total RMS power handling of all the subwoofers included in the package or enclosure.

If the loaded enclosure or amplifier and subwoofer package includes more than a single subwoofer, then this is the total RMS power handling for all of the subs combined.

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 giving your subwoofer(s) 75% - 90% of the recommended RMS rating.
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Final Wired Impedance
This is the final impedance of the system as the amplifier will see it. If the final impedance is for two sets, it means that the enclosure has two sets of terminals at the listed impedance.
Box Finish
The material used on the outside of the box. Most boxes are carpeted to prevent exterior scratches; however vinyl is popular as it can often be color-matched to a near exact look of your leather factory interior.
Condition

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MTX Audio Thunderform F150C04T12-TN (Tan, Loaded) Open Box (Complete)

Custom-Fit Tan Enclosure Loaded with 10" Subwoofer for 2004-2006 Ford F-150 SuperCab

F150C04T12-TN big DISCONTINUED
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MTX Audio Thunderform F150C04T12-TN (Tan, Loaded) Open Box (Complete)

Custom-Fit Tan Enclosure Loaded with 10" Subwoofer for 2004-2006 Ford F-150 SuperCab

• Loaded 12" Subwoofer Enclosure Custom-Fit for 2004-2007 Ford F-150 Pickup
• 400W Max
• 200W RMS
• Polypropylene Woofer Cone
• Rubber Surround
• 28oz. Magnet Structure

No Fit Icon Doesn't fit your XJS

• Loaded 12" Subwoofer Enclosure Custom-Fit for 2004-2007 Ford F-150 Pickup
• 400W Max
• 200W RMS
• Polypropylene Woofer Cone
• Rubber Surround
• 28oz. Magnet Structure

MTX Audio Thunderform JWTJ97T20-TN (Tan, Loaded)

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

JWTJ97T20-TN big DISCONTINUED
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MTX Audio Thunderform JWTJ97T20-TN (Tan, 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 Terminator Series Subwoofers
• 800W Max
• 400W RMS
• 4 ohm

No Fit Icon Doesn't fit your XJS

• Dual 10" Loaded Vehicle Specific Thunderform Subwoofer Enclosure
• 1997-2006 Jeep Wrangler TJ
• Loaded with Terminator Series Subwoofers
• 800W Max
• 400W RMS
• 4 ohm

MTX Audio Thunderform F150C04C12-TN (Charcoal, Loaded) Open Box (Complete)

Ford F-150 Crew/Ext Cab 2004-2008, 12" 4 ohm Loaded Vehicle Specific Thunderform Subwoofer Enclosure

F150C04C12-TN big DISCONTINUED
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MTX Audio Thunderform F150C04C12-TN (Charcoal, Loaded) Open Box (Complete)

Ford F-150 Crew/Ext Cab 2004-2008, 12" 4 ohm Loaded Vehicle Specific Thunderform Subwoofer Enclosure

• Loaded 12" Subwoofer Enclosure Custom-Fit for 2004-2007 Ford F-150 Pickup
• 400W Max
• 200W RMS
• Polypropylene Woofer Cone • Rubber Surround
• 28oz. Magnet Structure

No Fit Icon Doesn't fit your XJS

• Loaded 12" Subwoofer Enclosure Custom-Fit for 2004-2007 Ford F-150 Pickup
• 400W Max
• 200W RMS
• Polypropylene Woofer Cone • Rubber Surround
• 28oz. Magnet Structure

MTX Audio Thunderform DMAGW05C10U (Charcoal, Unloaded)

Single 10" 2005 Dodge Magnum Unloaded Charcoal Bass Slammer ThunderForm Subwoofer Enclosure Box

DMAGW05C10U big DISCONTINUED
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MTX Audio Thunderform DMAGW05C10U (Charcoal, Unloaded)

Single 10" 2005 Dodge Magnum Unloaded Charcoal Bass Slammer ThunderForm Subwoofer Enclosure Box

• 2005 Dodge Magnum Unloaded Charcoal Single 10" Bass Slammer ThunderForm Subwoofer Enclosure Box
• Mounts In Driver Side Of The Trunk In Vehicle
• Mounting Depth: 6-1/2"
• Cutout Diameter: 9-3/8"
• Box Volume: 0.75 Cu

No Fit Icon Doesn't fit your XJS

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• 2005 Dodge Magnum Unloaded Charcoal Single 10" Bass Slammer ThunderForm Subwoofer Enclosure Box
• Mounts In Driver Side Of The Trunk In Vehicle
• Mounting Depth: 6-1/2"
• Cutout Diameter: 9-3/8"
• Box Volume: 0.75 Cu

MTX Audio Thunderform DDXP201U (Black, Unloaded)

Dodge Dakota Club Cab 1997-2004 Unloaded Dual 10" Bass Slammer Subwoofer Enclosure

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MTX Audio Thunderform DDXP201U (Black, Unloaded)

Dodge Dakota Club Cab 1997-2004 Unloaded Dual 10" Bass Slammer Subwoofer Enclosure

• Unloaded Dual 10" Thunder Form Subwoofer Enclosure
• For 1997-2004 Dodge Dakota Club Cab Trucks Vehicles
• Designed For Under Rear Jump Seat
• Box volume: 1.8 cubic feet

No Fit Icon Doesn't fit your XJS

3

• Unloaded Dual 10" Thunder Form Subwoofer Enclosure
• For 1997-2004 Dodge Dakota Club Cab Trucks Vehicles
• Designed For Under Rear Jump Seat
• Box volume: 1.8 cubic feet

MTX Audio Thunderform DRQC20C-T45 (Charcoal, Loaded)

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

DRQC20C-T45 big DISCONTINUED
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MTX Audio Thunderform DRQC20C-T45 (Charcoal, Loaded)

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

Dual 10" Loaded 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 XJS

1

Dual 10" Loaded 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 RMP10G-T45 (Gray, Loaded)

Ford Ranger Regular Cab 1993-1997, 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

RMP10G-T45 big DISCONTINUED
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MTX Audio Thunderform RMP10G-T45 (Gray, Loaded)

Ford Ranger Regular Cab 1993-1997, 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

Single 10" Loaded Vehicle Specific MTX Thunderform Subwoofer Enclosure • For 1993-1997 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 XJS

Single 10" Loaded Vehicle Specific MTX Thunderform Subwoofer Enclosure • For 1993-1997 Ford Ranger Regular Cab • Loaded with Thunder4500 Subwoofer • 450W Max • 225W RMS • 4 ohm • Carbon filled Polypropylene Cone

MTX Audio Thunderform F250X00C20A-TN (CHARCOAL, AMPLIFIED) (Open Box, Complete)

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

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MTX Audio Thunderform F250X00C20A-TN (CHARCOAL, AMPLIFIED) (Open Box, Complete)

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

• Amplified Dual 10" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2000-2007 Ford F-250 Super Cab
• Loaded with Terminator Series Subwoofers
• 800W Max
• 400W RMS
• 4 ohm

No Fit Icon Doesn't fit your XJS

• Amplified Dual 10" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2000-2007 Ford F-250 Super Cab
• Loaded with Terminator Series Subwoofers
• 800W Max
• 400W RMS
• 4 ohm

10" MTX Subwoofer+Enclosure+Front+Rear Speakers For 2009-15 Ford F-150 Super Cab

Ford F-150 SuperCab 2009-2010, Loaded 10" 4 ohm Subwoofer Enclosure Package

F150EX09FB10-TN TERMINATOR573 MET-725600 big DISCONTINUED
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10" MTX Subwoofer+Enclosure+Front+Rear Speakers For 2009-15 Ford F-150 Super Cab

Ford F-150 SuperCab 2009-2010, Loaded 10" 4 ohm Subwoofer Enclosure Package

• Loaded 10" Subwoofer Enclosure
• Fits in Ford F-150 SuperCab Cab 2009-2010
• 400W Max
• 200W RMS
• Fiberglass Construction
• 1.5" Voice Coil
• 28oz. Magnet
• Enclosure Volume: 1.0 Cubic Ft

No Fit Icon Doesn't fit your XJS

112

• Loaded 10" Subwoofer Enclosure
• Fits in Ford F-150 SuperCab Cab 2009-2010
• 400W Max
• 200W RMS
• Fiberglass Construction
• 1.5" Voice Coil
• 28oz. Magnet
• Enclosure Volume: 1.0 Cubic Ft

MTX Audio Thunderform FMUST05BK12-TN (BLACK, LOADED) (Open Box, Complete)

Ford Mustang 2005-2009, 12" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

FMUST05BK12-TN big DISCONTINUED
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MTX Audio Thunderform FMUST05BK12-TN (BLACK, LOADED) (Open Box, Complete)

Ford Mustang 2005-2009, 12" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

• Single 12" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2005-2008 Ford Mustang
• Loaded With a Terminator Series Subwoofer
• 400W Max
• 200W RMS
• 4 ohm

No Fit Icon Doesn't fit your XJS

• Single 12" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2005-2008 Ford Mustang
• Loaded With a Terminator Series Subwoofer
• 400W Max
• 200W RMS
• 4 ohm

MTX Audio Thunderform DRXP20G-T45 (Gray, Loaded)

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

DRXP20G-T45 big DISCONTINUED
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MTX Audio Thunderform DRXP20G-T45 (Gray, Loaded)

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

(GRAY COLOR) Under rear seat on driver side. Bolts to vehicle with supplied hardware • For 1994-2001 Dodge Ram Extended Cab • 10" Thunder Series Subwoofer • 225W Max • 115W RMS • Carbon filled polypropylene cone • 4 ohm impedance

No Fit Icon Doesn't fit your XJS

(GRAY COLOR) Under rear seat on driver side. Bolts to vehicle with supplied hardware • For 1994-2001 Dodge Ram Extended Cab • 10" Thunder Series Subwoofer • 225W Max • 115W RMS • Carbon filled polypropylene cone • 4 ohm impedance

MTX Audio Thunderform JWTJ97T20-T45 (Tan, Loaded)

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

JWTJ97T20-T45 big DISCONTINUED
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MTX Audio Thunderform JWTJ97T20-T45 (Tan, 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 XJS

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 FXP16T-T45(Tan, Loaded)

Ford F-150 Extended Cab 1997-2003, 2 8" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

FXP16T-T45 big DISCONTINUED
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MTX Audio Thunderform FXP16T-T45(Tan, Loaded)

Ford F-150 Extended Cab 1997-2003, 2 8" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

• Dual 8" Loaded Vehicle Specific Thunderform Subwoofer Enclosure
• For 1997-2003 Ford F-150 Extended Cab
• Loaded with 8" Thunder4500 Subwoofers
• 600W Max
• 300W RMS
• 4 ohm

No Fit Icon Doesn't fit your XJS

• Dual 8" Loaded Vehicle Specific Thunderform Subwoofer Enclosure
• For 1997-2003 Ford F-150 Extended Cab
• Loaded with 8" Thunder4500 Subwoofers
• 600W Max
• 300W RMS
• 4 ohm

MTX Audio Thunderform CTYSD07FB10-TN (Black, Loaded)

Chevrolet Tahoe 2007-2010, Loaded 10" 4 ohm Subwoofer Enclosure

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MTX Audio Thunderform CTYSD07FB10-TN (Black, Loaded)

Chevrolet Tahoe 2007-2010, Loaded 10" 4 ohm Subwoofer Enclosure

• Loaded 10" Subwoofer Enclosure
• Fits in Chevrolet Tahoe/Suburban 2007-2010
• 400W Max
• 200W RMS
• Fiberglass Construction
• 1.5" Voice Coil
• 28oz. Magnet
• Enclosure Volume: 0.6 Cubic Ft

No Fit Icon Doesn't fit your XJS

• Loaded 10" Subwoofer Enclosure
• Fits in Chevrolet Tahoe/Suburban 2007-2010
• 400W Max
• 200W RMS
• Fiberglass Construction
• 1.5" Voice Coil
• 28oz. Magnet
• Enclosure Volume: 0.6 Cubic Ft

MTX Audio Thunderform TTP10AT-TN (Tan, Amplified)

Toyota Tacoma Regular Cab 1996-2004, Amplified 10" 4 ohms Loaded Thunderform Subwoofer Enclosure

TTP10AT-TN big DISCONTINUED
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MTX Audio Thunderform TTP10AT-TN (Tan, Amplified)

Toyota Tacoma Regular Cab 1996-2004, Amplified 10" 4 ohms Loaded Thunderform Subwoofer Enclosure

• Amplified 10" Loaded Vehicle Specific MTX Thunderform Sealed Subwoofer Enclosure
• For 1996-2004 Toyota Tacoma Regular Cab
• Loaded with a Terminator Series Subwoofer
• 400W Max
• 200W RMS
• 4 ohm

No Fit Icon Doesn't fit your XJS

• Amplified 10" Loaded Vehicle Specific MTX Thunderform Sealed Subwoofer Enclosure
• For 1996-2004 Toyota Tacoma Regular Cab
• Loaded with a Terminator Series Subwoofer
• 400W Max
• 200W RMS
• 4 ohm

MTX Audio Thunderform DD8T45 (Black, Loaded)

DD8 Loaded 8" ThunderForm for 1998-2003 Dodge Durango w/ 1 Thunder4500 8" Sub

DD8-T45 big DISCONTINUED
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MTX Audio Thunderform DD8T45 (Black, Loaded)

DD8 Loaded 8" ThunderForm for 1998-2003 Dodge Durango w/ 1 Thunder4500 8" Sub

• DD8 Loaded 8" ThunderForm for 1998-2003 Dodge Durango with 1 Thunder4500 8" Sub
• Ported enclosure tuned to 34 Hz
• 100W Max
• 50W RMS
• Injection-molded, carbon-filled polypropylene cone woofer
• Rubber surround

No Fit Icon Doesn't fit your XJS

• DD8 Loaded 8" ThunderForm for 1998-2003 Dodge Durango with 1 Thunder4500 8" Sub
• Ported enclosure tuned to 34 Hz
• 100W Max
• 50W RMS
• Injection-molded, carbon-filled polypropylene cone woofer
• Rubber surround

MTX Audio Thunderform DMAGW05C10-TN (Charcoal, Loaded)

Dodge Magnum 2005-2008, 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

DMAGW05C10-TN big DISCONTINUED
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MTX Audio Thunderform DMAGW05C10-TN (Charcoal, Loaded)

Dodge Magnum 2005-2008, 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

• 10" Loaded Thunderform Subwoofer Enclosure
• For Dodge Magnum 2005-2008
• Loaded with a 10" Terminator Series Subwoofer
• 400W Max
• 200W RMS
• 4 ohm

No Fit Icon Doesn't fit your XJS

• 10" Loaded Thunderform Subwoofer Enclosure
• For Dodge Magnum 2005-2008
• Loaded with a 10" Terminator Series Subwoofer
• 400W Max
• 200W RMS
• 4 ohm

MTX Audio Thundeform DDQC10-TN (Black, Loaded)

Dodge Dakota Quad Cab 2000-2004, 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

DDQC10-TN big DISCONTINUED
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MTX Audio Thundeform DDQC10-TN (Black, Loaded)

Dodge Dakota Quad Cab 2000-2004, 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

• 10" Loaded Vehicle Specific Thunderform Subwoofer Enclosure
• For Dodge Dakota Quad Cab 2000-2004
• MTX Terminator Series Subwoofer
• 300W Max
• 150 RMS
• Carbon Filled Polypropylene Cone
• 4 Ohm

No Fit Icon Doesn't fit your XJS

• 10" Loaded Vehicle Specific Thunderform Subwoofer Enclosure
• For Dodge Dakota Quad Cab 2000-2004
• MTX Terminator Series Subwoofer
• 300W Max
• 150 RMS
• Carbon Filled Polypropylene Cone
• 4 Ohm

MTX Audio Thunderform CS10G-T45 (Gray, Loaded)

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

CS10G-T45 big DISCONTINUED
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MTX Audio Thunderform CS10G-T45 (Gray, Loaded)

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

Chevrolet Suburban 1992-2000, 10" 4 ohm Loaded Vehicle Specific Thunderform Subwoofer Enclosure with 1 Thunder 4500 Subwoofer • 450W Max • 225W RMS • Replaces factory console • Features integrated cup holders and storage area

No Fit Icon Doesn't fit your XJS

Chevrolet Suburban 1992-2000, 10" 4 ohm Loaded Vehicle Specific Thunderform Subwoofer Enclosure with 1 Thunder 4500 Subwoofer • 450W Max • 225W RMS • Replaces factory console • Features integrated cup holders and storage area

MTX Audio Thunderform FEN10U (Black, Unloaded)

Unloaded Single 10" Custom-Fit Bass Slammer Subwoofer Enclosure for 1997-2002 Ford Expedition

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MTX Audio Thunderform FEN10U (Black, Unloaded)

Unloaded Single 10" Custom-Fit Bass Slammer Subwoofer Enclosure for 1997-2002 Ford Expedition

• Unloaded Single 10" Custom-Fit Bass Slammer Subwoofer Enclosure
• Vehicle Specific for 1997-2002 Ford Expedition
• Replaces Rear Passenger Side Factory Net Packet
• 10" Subwoofer
• 0.6 Cubic Feet
• Black

No Fit Icon Doesn't fit your XJS

1

• Unloaded Single 10" Custom-Fit Bass Slammer Subwoofer Enclosure
• Vehicle Specific for 1997-2002 Ford Expedition
• Replaces Rear Passenger Side Factory Net Packet
• 10" Subwoofer
• 0.6 Cubic Feet
• Black

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