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JL Audio ZR100-CT

Evolution™ ZR Series 1" aluminum dome tweeter

6 Reviews | 1 question - 1 answer

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Item # 136ZR100CT

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Our take on the JL Audio ZR100-CT

JL Audio's ZR100-CT high-performance 1" aluminum dome tweeters bring out the subtle details in your music so you get a clear sonic picture of all the instruments in the stereo mix. You'll enjoy the extended high-frequency response offered by an aluminum dome, while special-design butyl rubber surrounds eliminate the shrillness that can plague lesser metal tweeters.

Crisp, clean sound

JL Audio's ZR100-CT high-performance 1" aluminum dome tweeters bring out the subtle details in your music so you get a clear sonic picture of all the instruments in the stereo mix. You'll enjoy the extended high-frequency response offered by an aluminum dome, while special-design butyl rubber surrounds eliminate the shrillness that can plague lesser metal tweeters.

The crisp-sounding ZR100-CT tweeters feature strong neodymium magnets, ferrofluid-cooled for reliable performance. JL Audio's ratcheting swivel rotation (RSR) system allows you to aim these tweeters for the best possible stereo image in your vehicle.

Note: These tweeters must be used with the supplied in-line high-pass filters, 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.

Priced per pair

Product Highlights:

  • 1" ferrofluid cooled aluminum domes
  • flush- and surface-mount hardware included
  • in-line high-pass filters included (6 dB/octave)
  • power handling: 2-50 watts RMS (125 watts peak power)
  • frequency response: 4,000-25,000 Hz
  • impedance: 4 ohms
  • sensitivity: 89 dB (92 dB at 2.83V)
  • flush-mount depth: 9/16"
  • warranty: 1 year
  • Our 60-day money-back guarantee

Exactly what I expected, looks good and work great.

Roel, Loveland, CO

What's in the Box:

  • 2 Tweeters installed in enhanced flush-mount fixtures (with attached 6" speaker wires terminated by female quick-slide connectors)
  • 2 External crossovers with attached 11" positive and negative speaker leads terminated by male quick-slide connectors on one end and attached 46" positive and negative speaker leads terminated by bare-tinned wire on other end
  • 2 Tweeter compact flush-mount fixtures
  • 2 Tweeter angled surface-mount fixtures
  • 2 Metal spring clips for tweeter fixtures
  • Two 1-1/4" pan-head machine screws
  • Four 1" flat-head self-tapping screws
  • 4 Crimp-on 2.8mm male quick slides

JL Audio ZR100-CT Reviews

Average Customer Review(s):

(6 Reviews)

JL Audio ZR100-CT

Roel from Loveland, CO on 6/4/2017

2012 GMC Yukon
Crutchfield Customer Review (What's this?)

Exactly what I expected, looks good and work great.

Pros: None

Cons: Loud, perfect size and built to last.

Make Your System Sing

Dean from Anchorage, AK on 10/31/2016

2015 Toyota 4Runner
Crutchfield Customer Review (What's this?)

I installed the JL Audio ZR100-CT tweeters in the dash of my 2015 4-Runner. The installation tech somehow used the existing factory speakers by cutting away the middle part and gluing the new tweeters onto that housing. Whatever he did, they sound great. The ZR100's are very revealing with almost no glare. I'm not a car audio expert but my experience has been that spending a little extra on high quality tweeters can make a system really "sing".

Pros: Crisp, clear and very little glare.

Cons: None

Great Tweeters

Matty K from Virginia Beach, VA on 9/19/2016

2007 Jeep Wrangler Unlimited
Crutchfield Customer Review (What's this?)

This tweeters were just the right size for the tweeter housings in my 2007 Jeep Wrangler. Only a slight mod with a file was needed to make them fit. These were installed into a system with a 4 channel JL audio amp to four 6.5 inch infinity Kappa speakers and aftermarket head unit. They pack quite a punch. The louder you turn it up, the more crisp and clear these sound. I previously had Infinity Kappa tweeters which weren't bad at all but compared to these, they left something to be desired. I don't think these tweeters would be for you if you're running a stock set up though. These are clearly meant for an upgraded and more powerful system so that may be something keep that in mind

Pros: Looks great Sounds great Crisp and clear Easy install

Cons: Little expensive

JL ZR 100 CT

ALGIES TOYOTA TUNDRA from Virginia on 9/21/2015

Crutchfield Customer Review (What's this?)

Tweeters are crisp and loud when your increase volume. I have 4 pair installed

Pros: Attractive look if you are surface mounting.

Cons: None

Best tweeters I've heard

Tony C from Nevada on 2/1/2015

Crutchfield Customer Review (What's this?)

Just Installed last week and all I can say is I wish I would have known about these way before cause now I can actually listen to my music instead of only bass.

Pros: Great Sound

Cons: None at this moment

JL tweeters

mancho from tampa, fl on 11/12/2014

Crutchfield Customer Review (What's this?)

Great tweeters. I can get all kinds of high notes out of them depending on how I equalize my full-range front JL speakers

Pros: Great sound

Cons: price, the angled mount does not have the chrome "JL" circle surrounding it like the flush mount does so it looks a little off.


Hands-on research

Features and Specs

Speaker Size
Design 1-way
Tweeter Design 1" Dome
Impedance (Ohms) 8
Tweeter Composition Aluminum
Woofer Composition ---
Woofer Surround Butyl rubber
Parts Warranty 1 Year
Labor Warranty 1 Year
Sensitivity (1W at 1 meter) 90.5
Sensitivity at 2.83 volts N/A
Frequency Response 4000 - 25k Hz
Minimum RMS Wattage 25
Maximum RMS Wattage 175
Peak Power Handling (Watts) 225
Top-mount Depth (Inches) 0 5/8
Bottom-mount Depth (Inches) N/A
Cutout Diameter or Length (inches) 1 3/4

Product Research


Aluminum Dome: The ZR component system tweeters utilize a 1" ultra-light aluminum dome, delicately suspended with a synthetic rubber, positive-roll surround to damp fatiguing ringing and preserve high-frequency definition. A Nomex voice coil former is used to further reduce mass.

Neodymium Magnets: The high-energy neodymium wafer magnet and machined field structures provide a dynamically stable field for the low-mass voice coil.

Performance: Each pair of ZR tweeters is tested and matched to within 1 dB of JL Audio's reference curve to ensure optimum system performance.

High Pass Crossover: The JL Audio external high pass crossover networks (12 dB/octave) offer high-end filter components such as precisely wound air-core inductors and high-quality, low-tolerance capacitors. Tweeter protection is also incorporated into the crossover networks. The crossovers measure 0.895" in diameter and 3.285" in length.

Mounting Options: A very shallow flush-mount system makes it easy to integrate the ZR tweeter into many vehicle interiors. Two additional mounting fixtures are also included for each tweeter. The tweeters come mounted in enhanced flush mount fixtures with silver trim and a JL Audio badge. The system also comes with compact flush-mount fixtures and angled, surface-mount fixtures. The mounting dimensions for each mounting option are as follows:

Mounting Fixture Mounting Depth Mounting Height Frame Diameter Cutout Diameter
Enhanced Flush Mount 0.566"
(1.5" screw depth)
0.48" 2.126" 1.725"
Compact Flush Mount 0.454"
(1.5" screw depth)
0.45" 1.898" 1.677"
Angled Surface Mount N/A
(7/8" screw depth)
0.903" 1.826" N/A

Our Product Research Team

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Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Well seems like JL Audio are one of the leading brands of speakers and I have a pair of JL Audio tweeters and by far have out performed the rest. [ roel  May 10, 2017 ]
I have jl coaxials with aluminum tweeters that sound awesome and think adding these will add some extra treble and bring my soundstage up higher from the doors by mounting them on the dash pillars [ Christopher  Mar 30, 2016 ]

1 question already asked

I have no idea but the tweeters are awesome!!! [ WENDELL K  Mar 20, 2015 ]