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JL Audio TR400-CXi

Evolution™ TR Series 4" 2-way car speakers — includes 4"x6" adapter plates

12 Reviews | 1 question - 1 answer

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Item # 136TR400CX

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825 Gardens Blvd

109 South Carlton

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Our take on the JL Audio TR400-CXi

You need great speakers to turn the audio signals from your car stereo into music. The Evolution™ TR series speakers take advantage of JL Audio's extensive research and obsessive testing to deliver excellent performance at prices any audio enthusiast can afford. Evolution™ TR speakers come in a wide range of sizes so you can improve the sound in almost any vehicle.

Next-level sound

You need great speakers to turn the audio signals from your car stereo into music. The Evolution™ TR series speakers take advantage of JL Audio's extensive research and obsessive testing to deliver excellent performance at prices any audio enthusiast can afford. Evolution™ TR speakers come in a wide range of sizes so you can improve the sound in almost any vehicle.

JL Audio's TR400-CXi 4" speakers use mica-filled long-excursion polypropylene woofers for enhanced upper bass response that'll really fill out your drums and guitars. The 1/2" woven textile dome tweeters broadcast all the little details that bring your music to life. Ferrofluid cooled tweeters and butyl rubber surrounds mean that these speakers will bring you great music for many years to come.

Priced per pair

Product Highlights:

  • 2-way 4" speakers (pair)
  • injection-molded mica-filled polypropylene woofer
  • butyl rubber surround
  • 1/2" textile dome tweeter
  • includes adapter plates for mounting in 4"x6" openings
  • 4-ohm impedance
  • 10-35 watts RMS power range
  • frequency response: 71-22,000 Hz
  • sensitivity: 84.5 dB
  • depth: 1-7/8"
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's in the Box:

  • Two 2-way speakers
  • Two plastic 4x6 adapter frames
  • 8 Self-tapping screws (length=1-3/16")
  • 4 Self-tapping screws (length=5/16")
  • 8 Speed clips
  • 2 Grilles
  • 2 Grille frames
  • Butyl adhesive putty for grilles
  • 2 Crimp-on 2.8mm female quick slides
  • 2 Crimp-on 5.2mm female quick slides
  • Owner's Manual
  • Cutout template

Great product, great value

Devan, Midland, TX


JL Audio TR400-CXi Reviews

Average Customer Review(s):

(12 Reviews)

JL Audio TR400-CXi

Devan from Midland, TX on 12/11/2017

2003 GMC Sierra 1500
Crutchfield Customer Review (What's this?)

Great product, great value



JL Audio TR400-CXi

Sebastien from Berkeley, CA on 8/25/2017

2001 Nissan Frontier
Crutchfield Customer Review (What's this?)

Quality middle priced product. Not a super dynamic range but the sound they do put out is nice.

Pros: Easy to install

Cons: Not much below mid range

very nice sounding speakers

wayne from leechburg pa on 9/7/2016

Crutchfield Customer Review (What's this?)

Great speakers for the money

Pros: all good

Cons: none

Front Speakers

Mark V from Rio Rancho, NM on 6/9/2016

1992 Chevrolet R-V Crew
Crutchfield Customer Review (What's this?)

Sounds good for small speakers. The big Winnebago is so noisy going down the road they will not be ok for that but they were the size that fit in the existing space. Next to wind screen.

Pros: Fits the space available

Cons: small

Know what to expect from a 4' coaxial

Mark from Jackson, TN on 5/16/2016

First I'll mention that I did not purchase these from Cruthfield only because a friend of mine owns a shop and sold me his display models for a price I could'nt turn down. But I do like helping people here make informed decisions so here we are. These were purchased to replace my factory dash speakers while keeping a stock appearance and handle more power. If you read the specs you already know they do not handle lower frequencies. They are mid-highs. Effeciency is also @84.5 db so you will need power regaudless of the power rating. Mine are running 100 watts from a Boston Acoustcs GT-42(100x4), crossed over @400hz highpass. The other two channels are pushing JL ZR800-CW 8" in the doors covering 400hz-70hz midbass. The front stage is solid. Mids and highs come across strong and bright. They did well down to 100hz but that was the limit at the power given to them. They handle everything I throw at them without distortion and can go as loud as I want them to. Other negitave reviews I've read say to me a few things; Improper xover points, underpowered(which will blow a voicecoil), or a blown voicecoil altogether. Know what your buying and how to use it, you'll do just fine. I also planned on using the factory grills, but the JL grills dropped into the factory indention perfectly(luck), so I color matched them to the dash. Wish I could post a picture.

Pros: Can handle more power than expected with proper xover points. Factory finish looks with a little work. Sound as good as higher priced models if you know what you're doing.

Cons: Needed to trim the dash out a little, but that was assumed already as the factory speakers were 3.5".

Made to fit

Don from Carson City, NV on 10/27/2013

Crutchfield Customer Review (What's this?)

I've had good enough luck with JL Audio products over the years. Facing a very limited space in a 1971 Alfa Romeo Montreal, I decided to try some Versapods and 4" speakers. There were very few 4" speakers offered with an included grille, as most are intended to replace OE units in their existing location. It required a tiny amount of grinding to open up the Versapod to accept the JL's, but only a moment's work. The speakers, as one would expect, offered no further challenge to mount. The efficiency of these speakers is quite a bit lower than the existing weird speakers provided in the Montreal, which are very long and skinny - available only from one source in Germany as a replacement for an old Mercedes. As I had also installed a Kenwood Sub in a similarly small space, I wasn't expecting the JL's to provide much bass, nor do they. They are strictly a mid and up speaker in this application, although it may be that a more acoustically helpful surround than the Versapod could bring out a wider range from these small speakers. So far, I have found that a slight forward bias on the fader gives me a good balance, with the full sonic range present. The JL's by themselves would NOT provide a full range, but their tight, upper range definition gives good clarity to the overall sound.

Pros: Small size. Included grille

Cons: Limited range - but that's to be expected from a 4" speaker.

Decent for the price.

Doug from Oshawa, Ontario, Canada on 6/2/2011

I bought 1 of these to replace the 3.5" Infinity Reference in my dash slot. I had to modify the opening a bit to fit the speaker in but there is a huge sound difference. I had to install a 100uF capacitor on the Infinity to keep the lower midrange from clipping the speaker out at high volumes. The TR400-CXi handles them without a problem. The highs are much clearer and the distortion I had is gone now. Where I live there aren't many shops with decent car audio but I managed to pick up one. For the price I'm definately pleased with this speaker. I haven't owned it long enough to know if it has a defect like some people are claiming but I assume it only happens to a handfuul of units. Probably ones made on a Friday LOL!! I would reccommend this speaker if someone needs a midrange fill. If it was actively crossed over properly it would sound beautiful. I've got mine hooked up at 35W from a monsoon amp in a grand prix. The guy at the store was running 150W to them and they were still holding up at moderate volumes!!



not worth it

jay from colorado on 4/19/2011

Crutchfield Customer Review (What's this?)

ran these for about 1 1/2 to 2yrs. i hated them ever since i got them but was never a big priority to send them back, i wish i had. i just faded them down and relied on the other speakers, i couldnt turn them up, even a little without terrible sound. and i spent 2 grand with crutchfield, they put my whole system together so it wasnt a compatability issue. after a while the main speaker rubs on the shaft that supports the tweet in the middle. if u push the speaker up and down its like nails on a chalkboard. 6 mo ago left speaker failed and yesterday right side so looks like a design defect.



Quality Product for Quality Truck

AC from Olathe, KS on 11/11/2010

2002 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Put these in the rear doors for my extended cab Chevy Truck. They sounded good, but not quite as good as the front 6.5's in the same model. Still a much needed improvement over the rattling stock speakers. Great price, great product, and great service! Thanks Crutchfield and JL Audio!



Like these speakers!

Ken from Dayton, Ohio on 3/1/2010

I opted out of the 4x6 in the dash and decided to use the TR400-CXi w/the adapters in my '90 Chevy p/u. Had to cut out the factory grills for the tweeters to stick thru and it's well worth it. Very clean/accurate. My JVC KDR-610 drives them well and volume is good when turned up with any kind of music. They compliment my MTX 4x6's in the rear very well and when I install my 10" JL sub/enclosure (behind the seat) and dedicated JL 175 watt sub amp I will have a system proud to show off!



TR400-CXi 4'' in 1998 silverado

Anonymous from CT on 10/11/2009

1998 Chevrolet K Series
Crutchfield Customer Review (What's this?)

i had a great experience with these speakers, they produce some nice smooth his and mids, not much in the bass department...but honestly would you really expect any? i have these paired with JL TR600-CXi 6-1/2 and its a great combo, they play great at all volumes




Alex from California on 5/1/2008

Crutchfield Customer Review (What's this?)

I bought these speakers trusting that they would be awesome, I mean they are JL Audio and the facts are all there. I was very wrong, the speakers sounded alright at very low volumes, but as you turned up the volume to normal to loud hearing, it was very bad. The speakers started to sound like a radio station that you barely get frequency to, very unclear. Can't turn it up, because they don't get very loud. These speakers, were just terrible, 4' speakers can be good, but these weren't. I bought these and returned them, don't give them a chance, you may end up doing the same.




Hands-on research

Features and Specs

Speaker Size 4
Design 2-way
Tweeter Design 1/2" Dome
Impedance (Ohms) 4
Tweeter Composition Textile
Woofer Composition IM Mica-Filled Polypropylene
Woofer Surround Butyl Rubber
Parts Warranty 1 Year
Labor Warranty 1 Year
Sensitivity (1W at 1 meter) 84.5
Sensitivity at 2.83 volts N/A
Frequency Response 71 - 22k Hz
Minimum RMS Wattage 10
Maximum RMS Wattage 35
Peak Power Handling (Watts) 70
Top-mount Depth (Inches) 1 7/8
Bottom-mount Depth (Inches) N/A
Cutout Diameter or Length (inches) 3 11/16

Product Research


Woofers: The JL Audio Evolution TR-series coaxial speakers feature injection-molded, mica-filled polypropylene cone woofers with 1" voice coils and flat symmetrical-roll spiders. The woofers use butyl rubber surrounds for reliability and strength.

Tweeters: The speakers have 1/2" treated textile dome tweeters with an integral phase plug and powerful, ferro-fluid cooled and damped neodymium magnets.

Crossovers: The TR-series coaxials use electrolytic capacitors on the 1st order high-pass filters. The woofer is unfiltered, using its engineered smooth roll-off characteristics to blend with its tweeter.

Flexible Mounting System: The speaker's 4 mounting tabs are scored to allow you to easily break them off for any application in which only 2 mounting screws are required. In addition, plastic 4x6 adapter plates are included to allow you to install these speakers into vehicles that use oval 4x6 speakers. Four 5/16" screws are supplied for attaching the speaker to the adapter plates.

Grilles: Two black metal mesh grilles and black ABS plastic grille frames are included with the speakers.

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.

Q & A

Customer Q&A

1 question already asked

Thanks for your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences in the models and help you make the best choice for your system and your budget. [ Kenny  May 02, 2016 ]  Staff

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