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Infinity Reference X REF-075tx

3/4" textile dome tweeters

25 Reviews | 2 questions - 2 answers

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Item # 108R075TX

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Our take on the Infinity Reference X REF-075tx

Infinity designed their REF-075tx tweeters to broadcast all the high-frequency details in your music, great news if you're suffering from a muddy soundstage in your car or you're just looking to brighten up your system a bit. These Reference X Series 3/4" textile domes add detail, help to clean up your soundstage, and provide an improved stereo image — without being shrill or causing harshness.

Bring on the clarity

Infinity designed their REF-075tx tweeters to broadcast all the high-frequency details in your music, great news if you're suffering from a muddy soundstage in your car or you're just looking to brighten up your system a bit. These Reference X Series 3/4" textile domes add detail, help to clean up your soundstage, and provide an improved stereo image — without being shrill or causing harshness.

REF-075tx tweeter

Built for power

A large voice coil and edge-driven tweeter design help these tweeters to handle up to 45 watts RMS, while in-line crossovers allow only the high frequencies to pass. Infinity's I-Mount™ system provides adapters that allow for surface- or flush-mounting, making installation a lot easier. You can use the included Starfish mounts to place the tweeters in many existing tweeter openings.

Note: These tweeters must be used with the supplied in-line high-pass crossovers, or an appropriate external crossover. Failure to do so could lead to damage to the tweeters not covered under the warranty.

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

Product Highlights:

  • 3/4" textile dome tweeters (pair)
  • flush- and surface-mount hardware included
  • Starfish™ bracket for mounting in factory tweeter locations
  • 2,500 Hz passive in-line crossovers included
  • power handling: 5-45 watts RMS (135 watts peak power)
  • frequency response: 2,500-21,000 Hz
  • sensitivity: 93 dB
  • top-mount depth: 13/16"
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's in the Box:

  • 2 Tweeters (each has attached 6" speaker leads)
  • 2 In-line crossovers (each has 23" input leads and 33" output leads)
  • 2 Flush-mount cups
  • 2 Threaded flush-mount adapters
  • 2 Plastic locking nuts
  • 2 Surface-mount cups
  • 2 Starfish tweeter mounts
  • Six 5/8" Self-tapping flat head screws
  • 2 Washers
  • 2 Nuts
  • Template on box
  • Owner's manual (English/ Danish/ German/ Spanish/ Finnish/ French/ Italian/ Dutch/ Polish/ Portuguese/ Russian/ Swedish/ Turkish/ Chinese)

Very nice sounding Tweeters. Included parts for a variety of mounting options. Had to fabricate a mounting bracket, but not too difficult. A huge improvement over the stock tweeters for my Tacoma!

Alan, Yuma, AZ


Infinity Reference X REF-075tx Reviews

Average Customer Review(s):

(25 Reviews)

Nice Tweeters

Alan from Yuma, AZ on 4/22/2016

2007 Toyota Tacoma
Crutchfield Customer Review (What's this?)

Very nice sounding Tweeters. Included parts for a variety of mounting options. Had to fabricate a mounting bracket, but not too difficult. A huge improvement over the stock tweeters for my Tacoma!

Pros: Nice sound, even with my stock head unit.

Cons: None.

Incredibly improved sound!

Tad from Prattsburgh, NY on 4/21/2016

Crutchfield Customer Review (What's this?)

To replace the tweeter with this product took a little fabricating. Nothing that Crutchfield couldn't help me accomplish over the phone. Thanks for the extra product support

Pros: Excellent upper frequency improvements; vocals, guitars, and horns. Really accentuates these sounds.

Cons: Only con was that I had to fabricate the housing that holds the tweeter and midrange.


Anonymous from tennessee on 4/14/2016

2007 GMC Sierra
Crutchfield Customer Review (What's this?)

good discount speaker




Austin7777 from Dallas, TX on 4/8/2016

2003 Jeep Liberty
Crutchfield Customer Review (What's this?)

The quality of this product is very good and really brings together my already established speaker system!

Pros: Great quality, had no problems with speaker itself!

Cons: The only problem is that there is no tweeter that will fit my dimensions exactly and I had to fabricate my own bracket to fit the specifications of the dash area! But it wasn't that hard to do just needs basic metal drilling and cutting skills!


btoms from Hawaii on 4/8/2016

2014 Toyota Tacoma
Crutchfield Customer Review (What's this?)

This tweeter screams the highs. It comes with a in line crossover which is nice because it's small. It's not one of those textbook looking ones. It also gives all the materials on what kind mounting options you need.

Pros: Loud Small crossover Easy to install

Cons: None

Great high end

Thom W from Hopkinton, MA on 3/31/2016

2007 Chevrolet Impala
Crutchfield Customer Review (What's this?)

These tweeters are pretty small but pack a punch..great frequency range and really pick up vocals and guitar twang and stringed instruments..may need to lower your treble but clarity is amazing...using with stock Bose amplifier and Kicker 6x9 from Crutchfield.

Pros: High end response Clarity, vocals, quick install in pillar, value

Cons: None

Love My Infinity's

Michael P from Folkston, Ga on 3/25/2016

2007 Chevrolet Impala
Crutchfield Customer Review (What's this?)

Excellent sound, super easy to install. Took about 15 minutes for both tweeters. Big difference in sound quality over the cheap factory speakers.


Cons: None

.75 reference tweeters

jerry from rayville, LA on 3/23/2016

2010 Chevrolet Silverado
Crutchfield Customer Review (What's this?)

my set up with 4 infinity reference 6.5's did not sound right without these in the front pillars. Much clearer and more accurate sounding than the factory tweeters.

Pros: good clear sound. not much money for the amount of improvement you get.

Cons: had to rig a way to install in factory locations. but was not hard to do.

Odd sound

David from Anchorage, AK on 3/23/2016

2001 Dodge Dakota
Crutchfield Customer Review (What's this?)

I installed these in a 2001 Dodge Dakota with stock Infinity tweeters (my old ones were blown). Installation was easy and the "universal backstraps" that Crutchfield recommends are actually not needed IF you buy 2 rubber gaskets from the hardware store. If you buy the super cheap gaskets, you can then use the installation pieces that are provided in the Infinity Reference X REF-075tx kit. It's a very easy install in the Dakota. These tweeters do not have the best sound quality unfortunately, and I think the stock tweeters sounded better; there is a near constant hissing sound coming from the tweeters because they're so sensitive. I regret buying these and I would return them if I felt like taking the time to remove my door panels again.

Pros: Easy install

Cons: Near constant hissing sound due to over-sensitivity Not as good as factory Infinity tweeters from the year 2001

Good addition over the factory speakers.

Christopher M. from Dickson, TN on 3/20/2016

2000 Buick Century
Crutchfield Customer Review (What's this?)

They were a little difficult to install, but were a good addition over the factory crap!




Dani from Pittsburgh, PA on 3/18/2016

2016 Subaru WRX
Crutchfield Customer Review (What's this?)

For the price can't be beat!!!

Pros: Price and sound

Cons: Have a modified fit

great sound

hossdog from waupaca, WI on 3/11/2016

2008 Chevrolet Silverado
Crutchfield Customer Review (What's this?)

excellent sound quality.

Pros: great sound, fit in factory placement

Cons: need to adapt to mount in factory position, strap or such, should tell you in description.

love them

Jim from plano, TX on 2/9/2016

2009 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

shipped as promised; easy install, great sound!



Several installation methods to work on many applications

speed from st charles, MO on 2/2/2016

I used these to replace factory tweeters in a 2010 Mazda 6 and they fit is the factory location, however since they would not lock into place, I had to rig it with tape. I used two strips of the type of tape used to seal around windows for your home. It has a thin layer of rubberized adhesive with a thin aluminum foil. The tweeters are mounted on a small plastic trim piece near the side view mirror. It could have been modified to use a more secure mounting method, but this method is working so far.

Pros: Mounting options and sound good.

Cons: Seems pricey for a pair of tweeters, but they all are.


austing from Wisconsin on 12/17/2015

2010 Volkswagen Jetta
Crutchfield Customer Review (What's this?)

I replaced all the factory speakers with infinity but the sound was muddy. After putting these little guys in it a much more crisp clean sound.

Pros: quality, a must have if you're putting new speakers in your car


Great Product

KevinS from Arizona on 12/13/2015

2000 Buick Century
Crutchfield Customer Review (What's this?)

Great product. Very easy to install with the many adapters included. This was a great upgrade from the factory tweeter for the price!

Pros: A lot of installation adapters included. Great sound. Great Price.

Cons: None

Great replacement for oem subaru tweeters!

Luke M from Glens Falls NY on 7/23/2015

Replacement for the stock dash tweeters in my 2015 impreza premium. This car did not have a "premium sound" upgrade. These tweeters have very good clarity and do not overpower the stock door speakers. Not too harsh or bright. I had to move the treble down a few notches from flat. The door speakers are the next to upgrade. They will most likely be Infinity (Harman). Excellent alternative to the Kicker a-la-carte from subaru. These have just as good if not better sound than kicker. I did have to gut the old speaker and use it as a mount for the smaller infinity ones. I also trimmed the inside of the grilles so they look factory from the top.

Pros: Lower cost, great clarity and responsiveness


As Advertised

Columbus Audio from Ohio on 3/1/2015

2013 Ford Edge
Crutchfield Customer Review (What's this?)

Used these to replace the factory tweeter in 2013 Ford Edge. Exact perfect fit. Dramatically improved front sound stage clarity. Highly recommend as solid product without breaking the bank.

Pros: Clarity, multiple methods for install

Cons: None

infinity tweeters

Lee from Humble, TX on 5/26/2014

2003 Mitsubishi Eclipse Spyder
Crutchfield Customer Review (What's this?)

Fantasic sound. Really compliments the Infinity Ref door speakers.

Pros: Great sound. Easy installation in my Eclipse.

Cons: None

Infinity Reference X REF-075tx

John C from Metairie, LA on 4/12/2014

2012 Ford F-150 XLT
Crutchfield Customer Review (What's this?)

Sounds great really adds depth to sound

Pros: easy install sounds great

Cons: none

Tweeter heaven

JB from Lafayette, CA on 4/12/2014

2014 Subaru Forester
Crutchfield Customer Review (What's this?)

A fine tweeter at a fair price. I replaced the stock tweeters in my 2014 Subaru Forester and greatly improved the clarity and depth of female voices and jazz instrumentals. This is my third vehicle in which I used Infinity Reference speakers, and I've been pleased by all.

Pros: Value, quality, variety of mounting options, sound great with OEM head unit (7-8 watts?)

Cons: None, but some facility with tools is helpful.

Excellent Tweeters---Reccomended

Sean C from Warren, CT on 10/10/2013

2013 Volkswagen Golf
Crutchfield Customer Review (What's this?)

Great sound, work perfect. Installed well, Lots of install options with the hardware. Great product

Pros: Lots of install options with the hardware

Cons: None so far

Infinity Reference X REF-075tx

Anonymous from Atlanta, GA on 7/22/2013

Crutchfield Customer Review (What's this?)

The tweeters sound great and aside from having to make some adjustments to the mounting hardware, were not too difficult to install.

Pros: Sound great

Cons: Did not have the proper items to mount, had to do some drilling and gluing.

GREAT Speakers and tweeters!

Tim from Cross Lanes, W.Va. on 6/25/2013

Crutchfield Customer Review (What's this?)

I received my speakers and tweeters within two day. Box came in great shape. I drive a 09 Honda civic. It took about 30 mins to install all speakers. Turned them on and realized that I had made the right choice on speakers. The bass sounds amazing and is still clear as can be. I suggest these to anyone looking to buy top of the line quality speakers. 2 thumbs up!

Pros: Sound great. Easy install. Ship fast.

Cons: None at all!

Great tweeters

Victor from San Jose, CA on 8/27/2012

1997 Ford Ranger
Crutchfield Customer Review (What's this?)

Great sounding speakers, installed them on my 97 Ford Ranger, takes an experienced installer, but piece of cake if you are one. I only wished that the instructions save me a little bit of time finding the correct hole saw. Otherwise, great sounding speakers, cross-overs are compact enough to allow me to mount them to inside the door panel nicely, and was able to easly splice them to the existing wires.

Pros: fairly easy install, sounds great, and great price

Cons: instructions could be made a little easier with dimension of required tools to help save time during installation. Although the cross-overs were compact, I remember the days of using certain capacitors to get tweeters to perform well, but thought that the cross-overs could be made even smaller now-a-days.


Hands-on research

Features and Specs

Speaker Size
Design 1-way
Tweeter Design 3/4" Dome
Impedance (Ohms) 3
Tweeter Composition Textile
Woofer Composition ---
Woofer Surround ---
Parts Warranty 1 Year
Labor Warranty 1 Year
Sensitivity (1W at 1 meter) N/A
Sensitivity at 2.83 volts 93
Frequency Response 2500 - 21k Hz
Minimum RMS Wattage 5
Maximum RMS Wattage 45
Peak Power Handling (Watts) 135
Top-mount Depth (Inches) 0 13/16
Bottom-mount Depth (Inches) 1
Cutout Diameter or Length (inches) 1 5/8

Product Research



Tweeter Material: Each tweeter features a 3/4" edge-driven textile dome for smooth, accurate highs.

Tweeter Mounting: The I-Mount tweeter mounting system and Starfish mounting brackets give you several different ways to mount the tweeters:

  • I-Mount Tweeter Mounting System: The tweeters can be surface- or flush-mounted with Infinity's innovative I-Mount system:
    • Surface Mount: Surface mounting the tweeters involves screwing the surface-mount cup to the mounting location, then inserting and locking the tweeter into the cup.
    • Flush Mount: Flush mounting is made easy through the use of the threaded flush-mount housing and plastic locking nut. Once a cutout is made, the tweeter is installed in the flush-mount adapter, then into the flush mount housing and inserted into the hole. The large plastic locking nut is threaded onto the adapter (from behind the mounting surface) to hold the complete assembly securely in place. When flush mounted, the tweeters may be angled for optimum response and imaging.
  • Starfish Mounting Brackets: The Starfish mounting brackets allow the tweeters to be installed in factory locations behind the grilles:
    • Bottom Mount: Once the Starfish bracket is trimmed, it is secured to the underside of the grille panel. The tweeter must be inserted into the bracket and locked into place before the bracket is mounted.
    • Surface Mount: Once the Starfish bracket is trimmed, it is screwed to the top of the mounting surface behind the grille panel. Then, the tweeter is inserted into the bracket and locked into place.
    • Flush Mount: There are two sets of tabs to flush mount the tweeter in the Starfish bracket, yielding different mounting dimensions. The upper tabs mount the tweeter completely below the opening and are glued in place. The lower mounting tabs are screwed in place and result in a mounting height just under a half inch. Once the bracket is mounted, the tweeter is inserted into the bracket and locked into place.

Tweeter Mounting Dimensions:

  I-Mount Surface Mount I-Mount Flush Mount Starfish Bottom Mount Starfish Surface Mount Starfish Flush Mount Starfish Flush Mount (below mounting surface)
Mounting Height 0.90" 0.672" 0.0" 0.885" 0.41" 0.065"
Depth 0.492" (screw depth) 0.808" 0.944" 0.492" (screw depth) 0.475" 0.88"
Frame Diameter 1.488" 1.845" 2.8" 2.44" 2.625" 3.04"
Cutout Diameter N/A 1.583" N/A N/A 1.51" 3.625"


In-line: Each tweeter has an in-line 2.5 kHz high-pass crossover.

Connections: Each crossover has 23" input leads and 33" output leads. The output leads are terminated with female quick-slides (that mate to the male quick-slides on the wire attached to the tweeters) and the input leads have bare wire.

Crossover Dimensions:

  • Length: 2.55"
  • Width: 0.95"
  • Height: 0.91"


True Four Ohm Impedance Technology: The speaker's 3-ohm impedance combined with the impedance of your speaker wire provides a true 4-ohm load to your connected head unit or amplifier.

Power Handling: Although Infinity rates the 075tx speakers at 45 watts RMS (continuous average), they also recommend amplifiers with a power rating from 5 to 75 watts RMS.

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.

Staff Reviews

Product reviews from the Crutchfield Labs

Four popular car speaker lines
by Robert Ferency-Viars

We listen to Alpine Type-S, Polk Audio DXi, Infinity Reference X, and Rockford Fosgate Punch car speakers in the Crutchfield Labs.

What are the Labs?
Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Have 6 other Infinity speakers already in system and sound quality is outstanding across a broad range of music and volume levels. Also very little coloration of the music. [ Richard  Apr 07, 2016 ]
Good reviews [ Evan  Mar 29, 2016 ]
The Chevy Volt can use 3/4" tweeters held in place with hot glue. Due to where the Bose system crosses over, they also need to have a low frequency capability (low for a tweeter). 2,500Hz should be low enough. The sensitivity should also match well for a stock sound system. [ Henry  Mar 13, 2016 ]
Read informational reviews very helpful! [ ANDRE  Mar 01, 2016 ]
morgan said it would work Morgan's Bio: [ cameron  Feb 28, 2016 ]
I needed a pair of good tweeters to replace the cheap, blown factory ones. [ Christopher M.  Feb 20, 2016 ]
It fits and I like Infinity [ Gary  Feb 20, 2016 ]
I have infinity 6x9 and 6 1/2. I wanted the same brand tweeter. I like for all my speakers to be the same brand. I feel the sound is "pure" when they are the same. [ Carlos  Feb 02, 2016 ]
My son requested this for his birthday! [ Carolyn  Jan 26, 2016 ]
to get better sound [ Raynard  Jan 21, 2016 ]
fits the factory mount, supposedly. [ michael  Jan 20, 2016 ]

2 questions already asked

I think that if your vehicle has seperate tweeters already then the crossovers would be present. If not then you would need to add one. [ Terry  Apr 07, 2016 ]
These speakers include a 2,500 Hz passive in-line crossover. [ Jeff  Dec 04, 2015 ]  Staff