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10" midbass speaker with 8-ohm voice coil

Item #: 236RTX108

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They'll hear you coming
Are you looking to play your music loud? If so, you'll want to check out MTX's Road Thunder Extreme speakers, which use PA system technology to bring concert sound levels to your car. MTX built the RTX108 10" midbass speaker to fill in the frequencies in between where your tweeters and subwoofers play. And, believe us — this incredibly efficient speaker will give you plenty of volume when you feed it some serious power.

Built for high power
The RTX108 handles up to 250 watts RMS thanks to its hefty magnet, treated paper cone, and cloth surround. You can also easily run two of these 8-ohm speakers with a single amplifier channel, great news if you're installing two in each door. You can install this speaker in an enclosure if you want, but it works great in a free-air applications.

Note: This package contains one speaker. You'll need an external amplifier to drive this speaker properly — an in-dash stereo won't have enough power.

Product Highlights:

  • 10" midbass speaker with 8-ohm voice coil
  • treated paper cone
  • treated cloth surround
  • power range: 50-250 watts RMS (750 watts peak power)
  • frequency response: 70-4600 Hz
  • sensitivity: 94 dB
  • mounting depth: 4-5/16"
  • warranty: 1 year
  • Our 60-day money-back guarantee

MTX RTX108 Reviews

Hands-on research

What's in the box?

Download owner's manual

  • One 10" Midbass driver
  • Specification sheet

Product Research



  • Fs (resonant frequency): 58.7 Hz
  • Qms (mechanical Q at Fs): 12.875
  • Cms (suspension compliance): 0.207 mm/N
  • Mms (diaphragm/coil mass, including acoustic load): 36.538 g
  • Rms (suspension's mechanical resistance): 1.019 kg/s
  • Vas (equivalent compliance volume): 37.116 liters
  • Xmax (maximum linear peak): 0.72 mm
  • D (cone diameter): 8.39"
  • Sd (cone area): 356.33 cm² (0.035633 m²)
  • Vd (peak displacement volume): 0.026 liters
  • Qes (Electrical Q at Fs): 0.771
  • Re (voice coil DC resistance): 5.50 Ω
  • Le (Voice coil inductance): 0.679 mH
  • Bl (force factor): 9.67 Tm
  • Qts (total Q at Fs): 0.727
  • η0 (reference efficiency): 0.938%
  • Peak Power: 750 watts
  • SPL: 94.0 dB
  • Frequency Response: 70 Hz to 4.6 kHz
  • Recommended Crossover: 100 Hz high pass


5 Year Warranty Terms: This product carries a 5-Year Prorated Warranty with the following terms:

  • Years 1-2: Products found to be defective in materials or workmanship during the first two years will be, at Mitek's option, repaired or replaced by Mitek at no charge. The warranty period does not renew, but continues on from the original date of purchase.
  • Years 3-5: The purchase price of an item which becomes defective after the first two years and prior to the end of the warranty period will be prorated and credited toward the purchase of a new MTX product. The amount of proration is determined by dividing the original purchase price by the number of months in the warranty period (60), then multiplying the result by the number of months remaining in the warranty period.

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.

Customer Q&A

1 question already asked

I used these as replacement speakers for a home system speaker boxes. [ John  May 03, 2015 ]

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