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MTX RTX88

8" midbass speaker with 8-ohm voice coil

Item # 236RTX88

They'll hear you coming Are you looking to play your music loud? If so, you'll want to check out MTX's Road...

They'll hear you coming Are you looking to play your music loud? If so, you'll want to check out MTX's Road...

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Item # 236RTX88

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$59.99 each
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About the MTX RTX88

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.

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.

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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: 2 years
  • Our 60-day money-back guarantee
  • MFR # RTX88

What's in the box:

  • One 8" Midrange
  • Specification sheet

Customer reviews

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MTX RTX88 reviews

Average review:

8 reviews

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5 Stars

Crutchfield customer from Olivehurst, CA on 7/27/2019

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Great Sub excellent bass at an excellent price. Note this is an 8 ohm Subwoofer not a 4.

Pros:

Cons:

Crutchfield response on

1 of 1 found this helpful

Great speakers!

jason from seattle on 5/26/2015

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These are great speakers, especially for the price. I am very happy with my purchase!

Pros: Good sound quality, good price, easy installation.

Cons: none

Crutchfield response on

3 of 5 found this helpful

Excellent Speakers

Falke from Florida on 3/23/2015

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Speakers are very good. They were not an exact fit, so some deck modifications were needed. That was unexpected. Also, was not provided the correct adapter plugs to fit the Volvo wiring. Had to make do on my own.

Pros:

Cons:

Crutchfield response on

2 of 8 found this helpful

amazing

matt b from canfield ohio on 3/8/2015

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amazing mids!!! im running them with the roadthunder 4in tweets and the sound is something else!!! full freq response even on the down lows, quality built!!!!

Pros: power hungry,,,, dont starve them!!!!

Cons: beefier terminals would be nice...

Crutchfield response on

2 of 3 found this helpful

Awesome Sub!!!!

Crutchfield customer from Bristol, Tn on 3/3/2014

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

Pros:

Cons:

Crutchfield response on

0 of 3 found this helpful

Nice

Woodsman from Douglas, WY on 5/1/2013

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

Pros:

Cons:

Crutchfield response on

4 of 5 found this helpful

MTX RTX88

Crutchfield customer from Valencia PA on 5/6/2012

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

Pros:

Cons:

Crutchfield response on

10 of 14 found this helpful

MTX RTX88 - Work for Home speakers too!!!

Bill C from New York on 4/17/2012

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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!!!

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23 of 23 found this helpful

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<< >>

More details on the MTX RTX88

Pat M.

Product Research

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

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Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
good reviews and would like to have the added sound to complete my sound system [ Damon  Nov 26, 2017 ]
A
Needed a deeper mid range to bridge the gap between my JBL components and MTX 12's. ") [ Aaron  Feb 19, 2017 ]
A
my friend telling me this is good midbass and brand also.. [ Jamon  Jan 05, 2016 ]

3 questions already asked

Q
Question. What does the term midbass speaker mean?. Can I use this use this as a woofer with a tweeter to obtain a full range speaker sound? (two way speaker system)
[ Andre  Apr 25, 2018 ]
1 answer
A
A midbass speaker is designed to reproduce the middle-to-upper bass frequencies in your music; which in the case of the MTX RTX88 is defined as 82-6,000 Hz. Since the midbass speaker only goes down to 82 Hz however, you wouldn't be getting full-range bass (which the human ear can perceive as low as 20 Hz) without a subwoofer also being used. For more details or to discuss further, please contact an Advisor directly by phone (888.955.6000) or online chat. Hope that helps!
[ Larry  May 07, 2018 ]  Staff
Q
How many watts have this Speaker ?
[ Timmy  Apr 06, 2018 ]
1 answer
A
The MTX RTX88 8" midbass speaker is designed to handle 25-150 watts RMS (at 8-ohms) from an external amplifier. For more details or to discuss further, please contact an Advisor directly by phone (888.955.6000) or online chat. Hope that helps! :)
[ Larry  Apr 16, 2018 ]  Staff
Q
Is this a "free-air" speaker? I typed in 8" sub and this appeared.
[ Brian  Jun 02, 2017 ]
2 answers
A
Simple answer?..Yes. The company says it will work fine as an open air speaker. They are assuming that the buyer knows how to install an open air woofer correctly. That method is definitely not an efficient design but,this speaker can do it well. It can also be used in a woofer box,which, would allow it to work at it's best. Just depends on your need,as to what you can do. One thing MTX DID build it for, is shallow mounting. It's depth is much less than regular 8 inch midbass speakers so that you can use less space,to make it work at it's best. Good luck.
[ Aaron  Jun 03, 2017 ]
A
First of all, the use of the term "free-air speaker" essentially has no meaning. The term "free air" (abbreviated fs) refers to the resonance (natural) frequency of a speaker in open air; i.e., not mounted in an enclosure. If you were to hit the rear of the speaker with your hand, its cone will vibrate at some natural frequency. This natural frequency is the free-air resonance of that speaker. The lower the free-air frequency, the better its bass response. The value of the free-air resonance of a speaker is usually considered when designing an enclosure that includes that speaker. (Audio engineers don't just build any convenient size box and mount speakers in it! Speaker cabinet design is a nearly a science in its own right. That being said, the MTX RTX88 speaker is a mid-bass speaker. I purchased two of them as replacements for my stereo speakers that had dry-rotted after 40 years. If you are looking for a heavy bass from this speaker, you'll likely not get what you'd like. (I've discarded the technical info that accompanied the speaker; so, I don't know what the free-air resonance is.) Also, if you will be using this speaker in a car system, it will not perform well because of its 8-ohm impedance--another of many specifications related to speakers. Car systems typically use lower-impedance speakers. My suggestion to you is to speak with a technical person at Crutchfield. The person will ask you questions related to your specific use, and recommend the right speaker for you. Howard D.
[ Howard  Jun 02, 2017 ]

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