MTX RTX88

8" midbass speaker with 8-ohm voice coil

Item #: 236RTX88

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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 RTX88 8" 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 RTX88 handles up to 150 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:

  • 8" midbass speaker with 8-ohm voice coil
  • treated paper cone
  • treated cloth surround
  • power range: 25-150 watts RMS (450 watts peak power)
  • frequency response: 82-6000 Hz
  • sensitivity: 94 dB
  • mounting depth: 2-15/16"
  • warranty: 1 year
  • Our 60-day money-back guarantee

Hands-on research

What's in the box?

Download owner's manual

  • One 8" Midrange
  • Specification sheet

Product Research

Specifications
Warranty

Specifications

  • Fs (resonant frequency): 72.8 Hz
  • Qms (mechanical Q at Fs): 14.375
  • Cms (suspension compliance): 0.295 mm/N
  • Mms (diaphragm/coil mass, including acoustic load): 16.232 g
  • Rms (suspension's mechanical resistance): 0.516 kg/s
  • Vas (equivalent compliance volume): 18.6118 liters
  • Xmax (maximum linear peak): 0.533 mm
  • D (cone diameter): 6.46"
  • Sd (cone area): 211.24 cm² (0.021124 m²)
  • Vd (peak displacement volume): 0.0113 liters
  • Qes (Electrical Q at Fs): 0.743
  • Re (voice coil DC resistance): 5.42 Ω
  • Le (Voice coil inductance): 0.309 mH
  • Bl (force factor): 7.36 Tm
  • Qts (total Q at Fs): 0.707
  • η0 (reference efficiency): 0.927%
  • Peak Power: 450 watts
  • SPL: 94.0 dB
  • Frequency Response: 82 Hz to 6 kHz
  • Recommended Crossover: 150 Hz high pass

Warranty

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 open the box, verify contents, 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.

MTX RTX88 Reviews

Average Customer Review:

4 reviews
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Awesome Sub!!!!

Written By Anonymous, Bristol, Tn on Monday, March 03, 2014

Crutchfield Customer Review (What's this?)

Awesome Sub!!!! Went in fast and could not ask for better sound in my 2003 4runner.

Nice

Written By Woodsman, Douglas, WY on Wednesday, May 01, 2013

Crutchfield Customer Review (What's this?)

Sounds great, it's a nice upgrade from the factory subwoofer.

MTX RTX88

Written By Anonymous, Valencia PA on Sunday, May 06, 2012

Crutchfield Customer Review (What's this?)

I am really beginning to believe in Crutchfield. Your products are as they are advertised. What a concept, Thank you!

MTX RTX88 - Work for Home speakers too!!!

Written By Bill C, New York on Tuesday, April 17, 2012

Crutchfield Customer Review (What's this?)

I was looking for new speakers for my old, BEAUTIFUL Advent Speaker cabinets because 2 of the speakers were blown. i accidently happened upon these speakers. Didn't even consider they were for cars, the specs said they could do what I needed so I bought them. The 2 I bought sounded so good in my cabinets I purchased 2 more to completely replace the speakers in my OLD BEAUTIFUL Advent cabinets. All I can say is the speakers sound Delicious. Of course as soon as I installed them I had to crank them to see how they handled the heat. They handled it beautifully in fact, they sparkled. I would recommend these speakers to anyone.

Pros: Excellent price, powerful speakers, very good sound.

Cons: They were TOO easy to install!!!! LOL!!!

Get everything you’ll need to enjoy your new MTX RTX88

Reduce ambient road noise and your vehicle's "rattles," for better sound inside your car.
You'll need speaker wire to connect your speakers to your amp.
Keep your speakers clean and dry. They compress to fit behind your speakers.
Grilles protect your speakers and give your installation a polished look.
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