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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 2000 FXST Softail Standard 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 FRANX99C20-T45 (Charcoal, Loaded)

Ford Ranger Super Cab 1999-2007, 2 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

FRANX99C20-T45 big DISCONTINUED
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MTX Audio Thunderform FRANX99C20-T45 (Charcoal, Loaded)

Ford Ranger Super Cab 1999-2007, 2 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

Dual 10" Loaded Vehicle Specific MTX Thunderform Subwoofer Enclosure • For 1999-2007 Ford Ranger Super Cab • Loaded with 2 Thunder4500 Subwoofers • 900W Max • 450W RMS • 4 ohm

No Fit Icon Doesn't fit your FXST Softail Standard

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Dual 10" Loaded Vehicle Specific MTX Thunderform Subwoofer Enclosure • For 1999-2007 Ford Ranger Super Cab • Loaded with 2 Thunder4500 Subwoofers • 900W Max • 450W RMS • 4 ohm

MTX Audio Thunderform C25HC00T20A-T45 (Tan, Amplified)

Chevrolet 2500/3500 Crew Cab 2000-2006, Amplified 2 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

C25HC00T20A-T45 big DISCONTINUED
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MTX Audio Thunderform C25HC00T20A-T45 (Tan, Amplified)

Chevrolet 2500/3500 Crew Cab 2000-2006, Amplified 2 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

• Dual 10" Loaded Thunderform Subwoofer Enclosure with Built-in Amplifier
• For Chevrolet 2500/3500 Crew Cab 2000-2006
• Also fits 2000-2006 GMC 2500 and 3500HD Crew Cab
• 900W Max
• 450W RMS
• Built-In 200 Watt Amplifier

No Fit Icon Doesn't fit your FXST Softail Standard

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• Dual 10" Loaded Thunderform Subwoofer Enclosure with Built-in Amplifier
• For Chevrolet 2500/3500 Crew Cab 2000-2006
• Also fits 2000-2006 GMC 2500 and 3500HD Crew Cab
• 900W Max
• 450W RMS
• Built-In 200 Watt Amplifier

MTX Audio Thunderform S1010C-T45 (Charcoal, Loaded)

Chevrolet S-10 1995-2003, 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

S1010C-T45 big DISCONTINUED
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MTX Audio Thunderform S1010C-T45 (Charcoal, Loaded)

Chevrolet S-10 1995-2003, 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

• 10" Loaded Vehicle Specific Thunderform Subwoofer Enclosure
• For Chevrolet S-10 1995-2003
• Also fits 1995-2003 GMC Sonoma and Isuzu Hombre
• Thunder4500 Subwoofer
• 450W Max
• 225W RMS
• 4 Ohm

No Fit Icon Doesn't fit your FXST Softail Standard

• 10" Loaded Vehicle Specific Thunderform Subwoofer Enclosure
• For Chevrolet S-10 1995-2003
• Also fits 1995-2003 GMC Sonoma and Isuzu Hombre
• Thunder4500 Subwoofer
• 450W Max
• 225W RMS
• 4 Ohm

MTX Audio Thunderform CF10-T45 (Black, Loaded)

Chevrolet Camaro / Pontiac Firebird 1993-2002, 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

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MTX Audio Thunderform CF10-T45 (Black, Loaded)

Chevrolet Camaro / Pontiac Firebird 1993-2002, 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

MTX Audio ThunderForm 10" Loaded Vehicle Specific Thunderform Subwoofer Enclosure • For 1993-2002 Chevrolet Camaro and Pontiac Firebird • Virtually invisible when installed

No Fit Icon Doesn't fit your FXST Softail Standard

MTX Audio ThunderForm 10" Loaded Vehicle Specific Thunderform Subwoofer Enclosure • For 1993-2002 Chevrolet Camaro and Pontiac Firebird • Virtually invisible when installed

MTX Audio Thunderform FEN10-T45 (Black, Loaded)

Ford Expedition 1997-2002, 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

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MTX Audio Thunderform FEN10-T45 (Black, Loaded)

Ford Expedition 1997-2002, 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

Single 10" Sealed Loaded Vehicle Specific Thunderform Subwoofer Enclosure • For Ford Expedition 1997-2002 • Loaded with Thunder4500 Subwoofer • 450W Max • 225W RMS • 4 ohm • Carbon filled polypropylene cone

No Fit Icon Doesn't fit your FXST Softail Standard

Single 10" Sealed Loaded Vehicle Specific Thunderform Subwoofer Enclosure • For Ford Expedition 1997-2002 • Loaded with Thunder4500 Subwoofer • 450W Max • 225W RMS • 4 ohm • Carbon filled polypropylene cone

MTX Audio Thunderform FEXST01BK10-T45 (Black, Loaded)

Ford Explorer Sport Trac, 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

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MTX Audio Thunderform FEXST01BK10-T45 (Black, Loaded)

Ford Explorer Sport Trac, 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

Single 10" Loaded MTX Thunderform Subwoofer Enclosure • Ford Explorer Sport Trac 2001-2004 • Loaded with Thunder4500 Subwoofer • 450W Max • 225W RMS • 4 ohm • Carbon filled polypropylene cone

No Fit Icon Doesn't fit your FXST Softail Standard

Single 10" Loaded MTX Thunderform Subwoofer Enclosure • Ford Explorer Sport Trac 2001-2004 • Loaded with Thunder4500 Subwoofer • 450W Max • 225W RMS • 4 ohm • Carbon filled polypropylene cone

MTX Audio Thunderform HA10-T45 (Granite, Loaded)

Honda Accord 1994-1997, 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

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MTX Audio Thunderform HA10-T45 (Granite, Loaded)

Honda Accord 1994-1997, 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure

Amplified 10" Loaded Vehicle Specific MTX Thunderform Sealed Subwoofer Enclosure • For 1994-1997 Honda Accord • Loaded with Thunder4500 Subwoofer • 450W Max • 225W RMS • 4 ohm • Carbon Filled Polypropylene Cone

No Fit Icon Doesn't fit your FXST Softail Standard

Amplified 10" Loaded Vehicle Specific MTX Thunderform Sealed Subwoofer Enclosure • For 1994-1997 Honda Accord • Loaded with Thunder4500 Subwoofer • 450W Max • 225W RMS • 4 ohm • Carbon Filled Polypropylene Cone

MTX Audio Thunderform CTYSD07FB10A-TN (Black, Amplified)

Chevrolet/GMC/Cadillac Trucks 2007-2015 Amplified & Loaded 10" Subwoofer Enclosure

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MTX Audio Thunderform CTYSD07FB10A-TN (Black, Amplified)

Chevrolet/GMC/Cadillac Trucks 2007-2015 Amplified & Loaded 10" Subwoofer Enclosure

• Amplified 10" Subwoofer Enclosure
• Fits in Chevrolet Tahoe/Suburban 2007-2010
• 400W Max
• 200W RMS
• Fiberglass Construction
• Built-in BTL Amplifier
• 28oz. Magnet
• Enclosure Volume: 0.6 Cubic Ft

No Fit Icon Doesn't fit your FXST Softail Standard

• Amplified 10" Subwoofer Enclosure
• Fits in Chevrolet Tahoe/Suburban 2007-2010
• 400W Max
• 200W RMS
• Fiberglass Construction
• Built-in BTL Amplifier
• 28oz. Magnet
• Enclosure Volume: 0.6 Cubic Ft

MTX Audio Thunderform C25HC00G20-T45 (Gray, Loaded)

Dual Loaded 10" Subwoofer Enclosure for 2000-2006 Chevy 2500HD Crew

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MTX Audio Thunderform C25HC00G20-T45 (Gray, Loaded)

Dual Loaded 10" Subwoofer Enclosure for 2000-2006 Chevy 2500HD Crew

(COLOR: GRAY) Location: Behind rear seat, jack stays in factory location • Also fits 2000-2006 Chevy 3500HD Crew Cab • For Chevy 2000-2006 Expedition vehicles • 10" Thunder Series Subwoofer • Max: 900 watts per pair / 450 watts each • RMS: 450W per pair / 225W each • Carbon filled polypropylene cone • 4 ohm impedance

No Fit Icon Doesn't fit your FXST Softail Standard

(COLOR: GRAY) Location: Behind rear seat, jack stays in factory location • Also fits 2000-2006 Chevy 3500HD Crew Cab • For Chevy 2000-2006 Expedition vehicles • 10" Thunder Series Subwoofer • Max: 900 watts per pair / 450 watts each • RMS: 450W per pair / 225W each • Carbon filled polypropylene cone • 4 ohm impedance

MTX Audio Thunderform C15C07FB10-TN (Black, Loaded) Open Box (Complete)

Chevrolet 1500/2500 Crew Cab 2007-2010, Loaded 10" 4 ohm Subwoofer Enclosure

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MTX Audio Thunderform C15C07FB10-TN (Black, Loaded) Open Box (Complete)

Chevrolet 1500/2500 Crew Cab 2007-2010, Loaded 10" 4 ohm Subwoofer Enclosure

• Loaded 10" Subwoofer Enclosure
• Fits in Chevrolet 1500/2500 Crew Cab 2007-2010
• 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 FXST Softail Standard

• Loaded 10" Subwoofer Enclosure
• Fits in Chevrolet 1500/2500 Crew Cab 2007-2010
• 400W Max
• 200W RMS
• Fiberglass Construction
• 1.5" Voice Coil
• 28oz. Magnet
• Enclosure Volume: 1.0 Cubic Ft

MTX Audio Thunderform C25HC00C20-TN (Charcoal, Loaded)

Dual Loaded 10" Subwoofer Enclosure for 2000-2006 Chevy 2500HD Crew

C25HC00C20-TN big DISCONTINUED
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MTX Audio Thunderform C25HC00C20-TN (Charcoal, Loaded)

Dual Loaded 10" Subwoofer Enclosure for 2000-2006 Chevy 2500HD Crew

• Dual 10" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2000-2006 Chevy 3500HD Crew Cab
• Also Fits Chevy 2000-2006 Expedition Vehicles
• Loaded with 10" Terminator Series Subwoofers
• 800W Max
• 400W RMS
• 4 Ohm

No Fit Icon Doesn't fit your FXST Softail Standard

• Dual 10" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2000-2006 Chevy 3500HD Crew Cab
• Also Fits Chevy 2000-2006 Expedition Vehicles
• Loaded with 10" Terminator Series Subwoofers
• 800W Max
• 400W RMS
• 4 Ohm

MTX Audio Thunderform C25HC00T20-TN (Tan, Loaded)

Chevrolet 2500/3500 Crew Cab 2000-2006, 2 10" 4 ohm Loaded Car Specific Thunderform Sub Enclosure

C25HC00T20-TN big DISCONTINUED
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MTX Audio Thunderform C25HC00T20-TN (Tan, Loaded)

Chevrolet 2500/3500 Crew Cab 2000-2006, 2 10" 4 ohm Loaded Car Specific Thunderform Sub Enclosure

• Dual 10" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2000-2006 Chevy 3500HD Crew Cab
• Also Fits Chevy 2000-2006 Expedition Vehicles
• Loaded with 10" Terminator Series Subwoofers
• 800W Max
• 400W RMS
• 4 Ohm

No Fit Icon Doesn't fit your FXST Softail Standard

• Dual 10" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For 2000-2006 Chevy 3500HD Crew Cab
• Also Fits Chevy 2000-2006 Expedition Vehicles
• Loaded with 10" Terminator Series Subwoofers
• 800W Max
• 400W RMS
• 4 Ohm

MTX Dual 10" Subwoofers+Box+Front+Rollbar Speakers For 1997-06 Jeep Wrangler TJ

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

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MTX Dual 10" Subwoofers+Box+Front+Rollbar Speakers For 1997-06 Jeep Wrangler TJ

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

• 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 FXST Softail Standard

8

• 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 F250C00C10-FPR (Charcoal, Loaded)

Loaded Charcoal Vehicle Specific Thunderform Subwoofer Enclosure for 2000-2006 Ford F-250 SuperCrew

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MTX Audio F250C00C10-FPR (Charcoal, Loaded)

Loaded Charcoal Vehicle Specific Thunderform Subwoofer Enclosure for 2000-2006 Ford F-250 SuperCrew

• 10" Thunderform Subwoofer Enclosure
• 2000-2006 Ford F250 SuperCrew
• Single 4 ohm Voice Coil
• 300W Max
• 150W RMS
• Factory Charcoal Color
• Terminator Series Subwoofer

No Fit Icon Doesn't fit your FXST Softail Standard

• 10" Thunderform Subwoofer Enclosure
• 2000-2006 Ford F250 SuperCrew
• Single 4 ohm Voice Coil
• 300W Max
• 150W RMS
• Factory Charcoal Color
• Terminator Series Subwoofer

MTX Audio Thunderform F250R00T20-TN (Tan, Loaded)

Ford F-250 Regular Cab 2000-2006, 2 10" 4 ohms Loaded Vehicle Specific Thunderform Sub Enclosure

F250R00T20-TN big DISCONTINUED
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MTX Audio Thunderform F250R00T20-TN (Tan, Loaded)

Ford F-250 Regular Cab 2000-2006, 2 10" 4 ohms Loaded Vehicle Specific Thunderform Sub Enclosure

• Dual 10" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For Ford F-250 Regular Cab 2000-2006
• Loaded with Terminator Series Subwoofers
• 800W Max
• 400W RMS
• 4 Ohm
• Polypropylene Cone

No Fit Icon Doesn't fit your FXST Softail Standard

• Dual 10" Loaded MTX Thunderform Sealed Subwoofer Enclosure
• For Ford F-250 Regular Cab 2000-2006
• Loaded with Terminator Series Subwoofers
• 800W Max
• 400W RMS
• 4 Ohm
• Polypropylene Cone

MTX Audio Thunderform CS10AC-TN (Charcoal, Amplified)

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

CS10AC-TN big DISCONTINUED
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MTX Audio Thunderform CS10AC-TN (Charcoal, Amplified)

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

• MTX Thunderform Loaded, Amplified 10" Subwoofer Enclosure
• For 1992-2000 Chevrolet Suburban
• 10" Terminator Series Subwoofer
• 400W Max
• 200W RMS
• 200 watt Class D Built-In Amplifier

No Fit Icon Doesn't fit your FXST Softail Standard

• MTX Thunderform Loaded, Amplified 10" Subwoofer Enclosure
• For 1992-2000 Chevrolet Suburban
• 10" Terminator Series Subwoofer
• 400W Max
• 200W RMS
• 200 watt Class D Built-In Amplifier

MTX Audio Thunderform NEON10ABK-TN (Black, Amplified)

Dodge Neon 1995-1999, Amplified 10" 4 ohm Loaded Vehicle Specific Thunderform Sub Enclosure

NEON10ABK-TN big DISCONTINUED
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MTX Audio Thunderform NEON10ABK-TN (Black, Amplified)

Dodge Neon 1995-1999, Amplified 10" 4 ohm Loaded Vehicle Specific Thunderform Sub Enclosure

• Loaded 10" Subwoofer Enclosure
• Fits In Dodge Neon 1995-1999
• 400W Max
• 200W RMS
• Amplified
• Enclosure Volume: 0.8 Cubic Ft

No Fit Icon Doesn't fit your FXST Softail Standard

• Loaded 10" Subwoofer Enclosure
• Fits In Dodge Neon 1995-1999
• 400W Max
• 200W RMS
• Amplified
• Enclosure Volume: 0.8 Cubic Ft

MTX Audio Thunderform S1010AC-TN (Charcoal, Amplified)

Chevrolet S-10 1995-2003, Amplified 10" 4 ohm Loaded Vehicle Specific Thunderform Sub Enclosure

S1010AC-TN big DISCONTINUED
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MTX Audio Thunderform S1010AC-TN (Charcoal, Amplified)

Chevrolet S-10 1995-2003, Amplified 10" 4 ohm Loaded Vehicle Specific Thunderform Sub Enclosure

• 10" Single 4-ohm Terminator Series Loaded Subwoofer Enclosure
• 200W Max
• 400W RMS
• For Chevrolet S-10 1995-2003
• Rubber surround
• Molded in Charcoal Factory Color

No Fit Icon Doesn't fit your FXST Softail Standard

• 10" Single 4-ohm Terminator Series Loaded Subwoofer Enclosure
• 200W Max
• 400W RMS
• For Chevrolet S-10 1995-2003
• Rubber surround
• Molded in Charcoal Factory Color

MTX Audio Thunderform C15EX07FB10A-TN (Black, Amplified)

Chevrolet 1500/2500 Extra Cab 2007-2010 Amplified 10" Subwoofer Enclosure

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MTX Audio Thunderform C15EX07FB10A-TN (Black, Amplified)

Chevrolet 1500/2500 Extra Cab 2007-2010 Amplified 10" Subwoofer Enclosure

• Amplified 10" Subwoofer Enclosure
• Fits in Chevrolet 1500/2500 Extended Cab 2007-2010
• 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 FXST Softail Standard

• Amplified 10" Subwoofer Enclosure
• Fits in Chevrolet 1500/2500 Extended Cab 2007-2010
• 400W Max
• 200W RMS
• Fiberglass Construction
• Built-in BTL Amplifier
• 28oz. Magnet
• Enclosure Volume: 1.0 Cubic Ft

MTX Audio Thunderform FEXST01BK10A-FPR (Black, Amplified)

2001-05 and 2007-10 Ford Explorer Sport Trac Amplified Loaded 10" Thunderform Subwoofer Enclosure

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MTX Audio Thunderform FEXST01BK10A-FPR (Black, Amplified)

2001-05 and 2007-10 Ford Explorer Sport Trac Amplified Loaded 10" Thunderform Subwoofer Enclosure

• 10" Amplified Loaded Enclosure
• Single 4 ohm Voice Coil
• 450W Max
• 225W RMS
• Carbon Filled Polypropylene Cone
• Polyether Foam Surround
• Color Is Consistent Throughout

No Fit Icon Doesn't fit your FXST Softail Standard

• 10" Amplified Loaded Enclosure
• Single 4 ohm Voice Coil
• 450W Max
• 225W RMS
• Carbon Filled Polypropylene Cone
• Polyether Foam Surround
• Color Is Consistent Throughout

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