MTX Audio TDX65

6.5" 2-Way Thunder Dome-Axial Series Coaxial Car Audio Speakers


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MTX Audio TDX65

6.5" 2-Way Thunder Dome-Axial Series Coaxial Car Audio Speakers


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NVX 25 ft. of True Spec 12 Gauge Speaker Wire

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Car Stereo and Speaker Installation Tool Kit

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NVX SDSK2 Speaker Kit

Eliminates speaker panel distortion and reduces vibration, rattles, and squeaks!



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Authorized MTX Dealer
  • 6-1/2" TDX Thunder Dome-Axial 2-Way Car Speakers
  • Power Handling:
    • Peak: 240 watts per pair / 120 watts each
    • RMS: 120 watts per pair / 60 watts each
  • Polyprolylene cone woofer
  • Rubber surround
  • 3/4" (20mm) Soft dome tweeter
  • Engineered with an extended low frequency reproduction for bigger, fuller sound
  • Concave cone design for improved off-axis response no matter where the speaker is mounted
  • Pivoting tweeter moves 15° in any direction for improved imaging, no matter where the installation location is
  • 4 ohms impedance
  • High temperature voice coil
  • Frequency Response: 48-20,000 Hz
  • Top-mount depth: 2-1/16"
  • Volume displacement: 1.27 cubic inches
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Priced Per Pair

Product History:

MTX THUNDER65 thumbnail
(newest, current model)
MTX TDX65 thumbnail
(previous model, replaced by MTX Audio THUNDER65)
MTX TDX6502 thumbnail
(previous model, replaced by MTX Audio TDX65)

Speaker Specifications

This is the manufacturer product line of speakers.
Thunder-Dome Axial (MTX)
Priced Per
Car Speakers are typically sold in pairs so you will receive 2 speakers for each speaker purchase on speakers marked "Priced Per Pair". If a speaker is marked "Priced Per Each" then the speaker is sold individually and each purchase you make will result in 1 speaker. High-powered tweeters, midrange and full-range pro audio for car speakers are typically sold per each speaker.
Speaker Size
Refers to the size of the speaker measured in inches. Every vehicle has standard application sizes. Please use our vehicle fitment guide for your vehicle's specific speaker sizes if you do not know them.
The number of individual drivers in a car speaker. Speakers with 2 drivers are known as a 2-way, and 3 drivers are known as a 3-way. Component systems are often referred to as "separates" because the tweeter is not attached to the midwoofer (main speaker driver) and mounts separately in a location such as a door post. Component systems typically come with an external crossover so you can easily adjust the high and low frequencies sent to both the midwoofer and the tweeter. Center channel speakers are great for those looking to have surround sound in their vehicle.
Tweeter Design
Designs such as cone, dome, semi-dome, balanced dome, and whizzer are most popular. Cone tweeters are simple, efficient and typically are the most reasonably priced. Dome tweeters are used in most home speakers, and provide a smoother and more accurate sound. Semi-dome design is one with a dome placed inside a cone. A Balanced dome driver is a semi-dome with equal reproduction area given the cone and dome portions of the driver. A whizzer tweeter is a separate tweeter cone driven by the voice coil of the woofer.
Woofer Composition
Lightweight woofer cone materials are essential for efficient operation. Poly cones produce exceptional sound and are sturdy against various changes in temperature. Paper cones are very efficient, and when treated for moisture resistance, will perform at a high level. Poly refers to polypropylene, which is thermoplastic or fibers that are polymers of propylene. IMPP refers to injection molded polypropylene, a commonly used process and material in speakers.
Woofer Surround
A speakers surround is part of the suspension system. The surround protects the cone and prevents it from being displaced as it flexes out from the basket. It is usually made of a durable material like treated foam or rubber in order to withstand the strenuous job of producing bass frequencies.
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
120 watts
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
60 watts
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
92 dB
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
48 - 20000 Hz
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
4 ohms
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.

Top-Mount Depth
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
Hi-Res Audio Compatible
This feature refers to if the product is capable of Hi-Res Audio (HRA) playback.
Speaker Grilles
A grating or screen of metal or plastic bars or wires, mounted in front of a speaker as protection. If yes, the speakers will include matching speaker grilles. If no, there are no grilles included.
Number of Speakers
This is the number of speaker that is included in the package. Each purchase will result in receiving the number of speakers indicated here. Please note that some items will have multiple woofers in the same enclosure. For sets of component speakers, this number will refer to the number of sets of speakers (For example, 2 would indicate the purchase includes 2 woofers and 2 tweeters).

Please refer to the product image and description for further details about the speaker.

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


Fort Wayne, IN

Great speakers at a great price!

March 25, 2014

Needing to upgrade the stock speakers in my 2013 Hyundai Veloster, I shopped around for several weeks before deciding on these MTX 6.5 speakers for the back of the car. With 5 star reviews on just about every website, nice looking specs, I figured I can't go wrong. They've been in the car for several days and they're starting to warm up and I can really hear the difference. I see they're discontinued but the newer model will probably be pretty close. I listen to hard rock and like a deeper sound from the back. I haven't added the amp & sub yet, but without them, these speakers are filling in where the stock speakers were lacking. The stock speakers in the back were horrible. Very muddy and rotten volume. The MTXs are very nice and I don't have to turn up the volume.
Being one of the more important specs I look at when considering speakers, I loved that the sensitivity was a good number. Most of the other speakers in the same class are under 90dB, so this being 92 was the main selling point for me - along with the reviews - and price, of course.
The speakers were easy to install. I can't give all 5 stars because i don't know how durable they're going to be AND giving 5 stars for "Look/Design" is silly. They look like speakers. Nothing special.
I can't do this review without rating my experience with Sonic Electronic customer service. I called the number with a question about installation for my specific car. I read somewhere that I needed to take out the back seat to install the left, rear speaker since there's no door there.I just wanted to know where the bolts were that I need to remove. The installer said that I did not have to remove the back seat. Well, he's wrong. It's impossible to remove the panel without removing the back seat. I shopped on this site because they provide the number to call the "experts". The guy I spoke to was nice and professional. He was just wrong. The other negative is the fact that these speakers need a different bracket to fit and Sonic Electronix doesn't provide the right size, nor do they suggest you buy the right bracket. The other "big name" electronic website shows they include the right bracket on these MTX speakers (no extra charge) and they included the bracket (no extra charge) that I'm going to need to replace the front speakers i just purchased from them.
You see, customer service is important, and in this case it's prompted me to shop elsewhere. I might buy here again if it's a great price and I don't need to call 800 number for help.

10 of 12 found this helpful

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paxton illinois


July 16, 2012

They work great! Have them in my Grand Prix and they are awesome, but definitely need an amp to push them properly!

8 of 10 found this helpful

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Springhaven, LA


May 17, 2012

These speakers are worth every penny. They rock hard.

8 of 10 found this helpful

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Kenner, LA

Great speaker for the price

June 14, 2011

I used to install car audio back in college, and really liked the MTX speakers. When our 02 Jaguar speakers went out, we just wanted a good sounding replacement without sinking a fortune into it. These speakers sound better than factory with better mids and highs.

9 of 12 found this helpful

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good value

January 1, 2014

Good sound. Not cheap material. The higher DB level gives it louder sound than the other speakers. It says I have to rate durability, but that can only come after a year of use. I will just guess at the level.

7 of 9 found this helpful

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Brown Deer, WI

Great Value

October 7, 2013

Good sound and quality for the money. Would purchase again. Great service from Sonic and speedy delivery.

7 of 9 found this helpful

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Coburg, OR

Beyond impressed !!!!!!!!

March 4, 2013

I placed the order for these and a kenwood H/U on Thursday night. It shipped out Friday, and I received them Monday, and that was with the free standard shipping. Not one scratch or dent in the shipping box. GREAT shipping. I hook all of it up, & wow these speakers are the best I've heard, out side of high end like focal. More bass than I've ever heard out of 6 1/2's. if your not going to run an amp, these are the best bang for your buck. Now I'm going to buy more to Finnish up my wife's car. Then I'm going to replace all the speakers in my ram quad cab with MTX.

7 of 9 found this helpful

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Lihue, HI

Great Sound! Solid Design!!

July 5, 2012

These MTX TDX65 6-1/2" speakers are well built and it sounds great!! It's not as bright sounding as the Infinity Kappa. I have it hooked up to my Alpine deck and I know these speakers would sound way better if I install an amp.. Thank you Sonic Electronix for a great website and fast shipping!!

6 of 8 found this helpful

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Accessory Tools and Products

Accessories added

NVX 25 ft. of True Spec 12 Gauge Speaker Wire

100% OFC wire with EnvyFlex metallic jacket insulates and protects against damage from extreme conditions.

Your Price $39.99

Car Stereo and Speaker Installation Tool Kit

Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.

Your Price $20.99

NVX XTGSP2 Tone Generator and Speaker Polarity Tester

Perfect for safely troubleshooting and testing audio systems

Your Price $19.99

Xscorpion WDCR2 Window and Door Clip Remover

Removes and installs handle and window crank clips.

Your Price $8.99

Universal Wire Puller & Grabber

Running wires has never been easier! This wire puller allows you to run wires through those hard to reach places!

Your Price $7.99

Encore Universal Four Door Power Door Lock Kit

Add Power Door Locking and Unlocking while you have the Door Panels removed

Your Price $29.99

NVX SDSK2 Speaker Kit

Eliminates speaker panel distortion and reduces vibration, rattles, and squeaks!

Your Price $14.99

Dynamat Xtreme Speaker Kit 10415

Enough sound dampening for 2 speakers!

Your Price $17.95

Stinger Roadkill Speaker Kit

Use this to eliminate rattle from your speakers!

Your Price $10.99

NVX Sound Dampening Rubber Roller

Install your Sound Dampening with ease using this heavy duty rubber roller!

Your Price $7.99

Speaker Baffles for your Speakers

Enhance the sound of your speakers with these easy to install speaker baffles.

Your Price $9.99

XTC 6-1/2" Round Large Frame, Shallow Foam Speaker Baffles

Creates a tight seal behind speaker for enhanced audio quality.

Your Price $13.84

12-10 AWG Butt Connectors

These yellow butt connectors are ideal when connecting thicker speaker wire your new aftermarket speakers.

Your Price $5.99

12-10 AWG Yellow T-Tap Adapters

Allows for fast and easy splicing of wires by easily tapping into the cable.

Your Price $12.99

Browse 1 question and 1 answer
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Why did you choose this?
Sonic Electronix Store
Chose these because of the specifications and previous user reviews. I have not been disappointed. Great speakers.
Laura S on Nov 13, 2015

Product Summary


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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: MTX Audio TDX65

  • MTX Thunder-Dome Series Coaxial Car Speakers
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