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MTX T8.6

Thunder8000 6-3/4" Component System

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Item # 236T86

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Our take on the MTX T8.6

MTX has applied its engineering expertise to building the ultimate component speaker system. The Thunder8000 T8.6 6-3/4" component system has the look, sound, and feel of high performance!

MTX has applied its engineering expertise to building the ultimate component speaker system. The Thunder8000 T8.6 6-3/4" component system has the look, sound, and feel of high performance!

The 6-3/4" woofer features a titanium-deposited, injection-molded cone and machine-turned front and back plates for an elegant, stainless steel look. And, with a die-cast basket, rugged butyl-rubber surround, and 1" voice coil, the woofer delivers the kind of performance you'd expect from a Thunder8000 component.

The smooth-sounding 1" silk dome tweeter is designed for great dispersion and can be flush- or surface-mounted. A two-position attenuation switch (0, +3 dB) helps you achieve the perfect high frequency balance in your system. The high-grade crossover (3500 Hz; 18 db/octave high-pass, 12 dB/octave low-pass) ensures extremely well-defined mids and highs.

  • frequency response 52-20,000 Hz
  • power range 8-60 watts RMS/120 peak
  • sensitivity 86 dB
  • top-mount depth (woofer) 2-7/8"
  • 1-year warranty

What's in the Box:

  • 2 Woofers
  • 2 Tweeters
  • 2 Crossovers
  • 2 Standard grilles with grille rings
  • 2 Flush mount tweeter housings
  • 2 Surface mount tweeter housings
  • 2 Flush mounting clips
  • Four 7/8" machine screws
  • Twelve 1-1/8" self-tapping screws
  • Four 5/8" self-tapping screws
  • Four 1/4" self-tapping screws
  • 8 Speed clips
  • 2 Self-adhesive foam pads
  • Two 10' lengths of speaker wire (no connectors)
  • Two 10' lengths of speaker wire (one end with female quick slides and the other end with bare wire)
  • Two 10' lengths of speaker wire (one end with bullet connectors and the other end with bare wire)
  • Owner's Manual
  • Cutout template

Hands-on research

Features and Specs

Speaker Size
Design 2-way
Tweeter Design Dome
Impedance (Ohms) 4
Tweeter Composition Silk
Woofer Composition Titanium-coated IMPP
Woofer Surround Butyl rubber
Parts Warranty 1 YEAR
Labor Warranty 1 YEAR
Sensitivity (1W at 1 meter) 86
Sensitivity at 2.83 volts N/A
Frequency Response 52 - 20k Hz
Minimum RMS Wattage 8
Maximum RMS Wattage 60
Peak Power Handling (Watts) 120
Top-mount Depth (Inches) 2 7/8
Bottom-mount Depth (Inches) 3 1/16
Cutout Diameter or Length (inches) 6 7/8

Product Research



Titanium Coated Injection-Molded Polypropylene Cone Woofer:The poly woofer cones are titanium plated for a high stiffness to mass ratio. The cones are strong, lightweight and resistant to the elements.

Butyl Rubber Surround:The butyl rubber surround has greater internal loss than standard urethane, preventing harmonic distortion at higher frequencies. It more efficiently absorbs edge reflections that can cause audible distortion, resulting in clearer bass performance. Additionally, a butyl rubber surround withstands the extremes of the automotive environment.

Die-Cast Basket: The die-cast basket helps eliminate destructive resonance frequencies. 


1" Silk Dome Tweeter: The tweeter is a 1" silk dome for smooth, clear highs.

Tweeter Mounting Options: The tweeters may be flush or surface mounted. The tweeters swivel inside the flush and surface mounting cups for optimum imaging.

Tweeter Mounting Dimensions
 Flush Mount (swivel)Surface Mount (swivel)
Mounting Depth0.799"NA
Mounting Height0.449"1.042"
Cutout Diameter2.109"NA
Frame Diameter2.391"2.057"


Crossover Frequency: The crossover features a 3.5kHz high-pass network for the tweeters and a 3.5kHz low-pass network for the woofers.

Selectable 0dB/+3dB Tweeter Output Level: There is a switch located on the crossover circuit board that allows the user to select full output level (0dB) or +3dB tweeter operation. The 0dB position is designed to give the smoothest system frequency response in most normal acoustical environments. If the interior acoustics of the vehicle or the tweeter placement dictate the need for increased high frequency output, the switch can be se to the +3dB position.

Inputs/Outputs: The crossover inputs and outputs are gold plated screw terminals. The terminals are gold plated to prevent performance robbing corrosion.

Mounting: There are 2 mounting holes in the base of each crossover.

Crossover Dimensions: W=4.763", H=1.266", D=3.015"

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.