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MTX Thunder51

Thunder Axe Series 5-1/4" 2-way component speaker system

Item # 236THND51

MTX doesn't make speakers that only deliver the goods in a sound lab.

Find what Fits your car

MTX doesn't make speakers that only deliver the goods in a sound lab.

California customers:
Please click here for your Proposition 65 warning.

Lee
Need help?
Contact our Virginia-based experts.

Item # 236THND51

Ships free today

Low stock
$199.99
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Contact our Virginia-based experts.

About the MTX Thunder51

Speakers for the real world

MTX doesn't make speakers that only deliver the goods in a sound lab. This Thunder51 component system features a 5-1/4” durable polypropylene woofer with a rubber surround that'll shrug off the weather and wear that come with living in your car full-time. You can swivel the 1-3/16" soft dome tweeter up to 15 degrees in your direction to really dial in the stereo imaging across your dash, and MTX includes hardware to flush- or surface-mounting.

Speakers for the real world

MTX doesn't make speakers that only deliver the goods in a sound lab. This Thunder51 component system features a 5-1/4” durable polypropylene woofer with a rubber surround that'll shrug off the weather and wear that come with living in your car full-time. You can swivel the 1-3/16" soft dome tweeter up to 15 degrees in your direction to really dial in the stereo imaging across your dash, and MTX includes hardware to flush- or surface-mounting.

The included crossover network features 2-level tweeter adjustment for fine-tuned sound staging. And while no car speaker can produce bass like a large subwoofer, the Thunder51 woofers truly shine in the lower frequencies. With up to 90 watts RMS of power handling, you can add to their impressive depth and richness when you power them with an outboard amplifier. MTX's 2-year warranty makes these Thunder51 speakers a smart buy.

Installation note: You'll need a pair of our universal backstraps to install the tweeters in the factory locations.

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Highlights:

  • component speaker system includes 2 woofers, 2 tweeters, and 2 crossovers
  • 5-1/4" polypropylene cone with rubber surround
  • 1-3/16" silk dome tweeter
  • 2-way crossover with adjustable tweeter level
  • power range: 2-90 watts RMS (180 watts peak power)
  • frequency response: 51-20,000 Hz
  • sensitivity: 92 dB
  • impedance: 4 ohms
  • woofer mounting depth: 2-1/4"
  • woofer grilles included
  • warranty: 2 years
  • Our 60-day money-back guarantee
  • MFR # THUNDER51

What's in the box:

  • 2 Woofers
  • 2 Tweeters (7" wire attached)
  • 2 Crossovers
  • 2 Woofer grilles
  • 2 Surface mount tweeter housings (with tweeters installed)
  • 2 Flush mount backing rings
  • 2 Flush mount trim rings
  • 2 Foam tweeter spacers
  • Four 6" Speaker wires (each with quick slide terminals on one end and bare wire on the other)
  • 2 Tweeter flush mounting clips
  • Two M4x35mm machine screws
  • Four 3/4" Flat-head screws
  • Eight 1" Self-tapping screws
  • 8 Speed clips
  • Cardboard template
  • Mounting diagram
  • Warranty information

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More details on the MTX Thunder51

Pat M.

Features & specs

General
Speaker Size 5 1/4
Design 2-way
Tweeter Design 30mm Dome
Impedance (Ohms) 4
Tweeter Composition Silk
Woofer Composition Polypropylene
Woofer Surround Rubber
Parts Warranty 2 Years
Labor Warranty 2 Years
Specifications
Sensitivity (1W at 1 meter) N/A
Sensitivity at 2.83 volts 90
Frequency Response 51 - 20k Hz
Minimum RMS Wattage 2
Maximum RMS Wattage 90
Peak Power Handling (Watts) 180
Top-mount Depth (Inches) 2 1/4
Bottom-mount Depth (Inches) N/A
Cutout Diameter or Length (inches) 4 11/16
Mounting Height (Inches) 0.319

Product Research

Features

Woofer Cones: The MTX Thunder Series speakers feature durable and rigid polypropylene woofer cones. Polypropylene is also resistant to the moisture and temperature extremes found in automotive applications.

Tweeter Mounting Options: The tweeters can be flush mounted or surface mounted using the included hardware. Once installed in either housing, the tweeter will pivot approximately 15° in any direction.

Tweeter Dimensions:

  Frame Diameter Cutout Diameter Mounting Height Mounting Depth
Flush Mount 2.235" 1.967" 0.318" 0.706"
Surface Mount 2.2" N/A 1.035" 0.64" (Screw Depth)

Crossovers: The crossover inputs and outputs are set screw terminals; they accept bare wire up to 10 gauge. There are two positive tweeter outputs, offering flat and -3dB output options. The screw terminals have 2mm Allen heads, and are recessed slightly more than half an inch, so a standard Allen head bit for a screw driver will not fit (an Allen wrench is not included). The crossover point is 4 kHz, the high pass slope is 18 dB/octave and the low pass slope is 6 dB/octave.

Crossover Dimensions:

  • Width: 4-15/16"
  • Height: 1-3/8"
  • Depth: 3-1/8"

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Customer Q&A

1 question already asked

Q
I am having difficulty trying to figure out should I go with 5-1/4 " for both my doors and rear deck in my challenger, or 5-1/4 in the door and 6-1/2" in the rear deck?
[ Jason  Aug 25, 2017 ]
1 answer
A
Thanks for your question. For information on comparing two or more models I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences and help you make the best choice for your system and your budget.
[ Kenny  Aug 25, 2017 ]  Staff

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