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JL Audio C3-650

Evolution™ C3 Series 6-1/2" convertible component speaker system

5 Reviews | 2 questions - 4 answers

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Item # 136C3650

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825 Gardens Blvd

109 South Carlton

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Our take on the JL Audio C3-650

The C3-650 component system uses a 6-1/2" mica-filled polypropylene woofer that covers the midrange and low frequencies strongly and accurately. A specially designed frame resists unwanted resonances, keeping your music free from interference. If you mount the tweeter separately, simply install a phase plug into the woofer and the sound will disperse smoothly throughout your vehicle.

Convertible speaker system

Versatile speaker system for any space

JL Audio's Evolution C3 speaker systems allow you to choose the best configuration for great sound in your vehicle. Mount the woofers and tweeters separately, and a C3 component system will fill your car with incredibly detailed, rich, and crystal-clear music, perfectly positioned in your listening space. In vehicles with limited space, you can mount the C3 tweeter inside the woofer to create a full-range, coaxial speaker that still performs with breathtaking impact.

Advanced material construction leads to clean musical reproduction

The C3-650 component system uses a 6-1/2" mica-filled polypropylene woofer that covers the midrange and low frequencies strongly and accurately. A specially designed frame resists unwanted resonances, keeping your music free from interference. If you mount the tweeter separately, simply install a phase plug into the woofer and the sound will disperse smoothly throughout your vehicle.

Silk tweeters and versatile crossover networks

The C3 tweeters use ferrofluid cooling to handle extreme levels of high-frequency information without overheating. Mounted separately or coaxially, these 1" silk dome tweeters broadcast crisp musical detail evenly without harshness. Separate, outboard crossovers use premium components to direct the signal flow to your woofers and tweeters. You can select from three midrange settings and four levels of tweeter presence to match the speaker system to your listening environment.

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

Priced per pair

Product Highlights:

  • component speaker system includes two 6-1/2" woofers, 2 tweeters, two external crossovers, and two woofer grilles
  • mica-filled polypropylene woofer with butyl rubber surround
  • glass-filled polymer frame with Elevated Frame Cooling
  • 1" silk dome tweeter
  • 2-way external crossover with adjustments for coaxial or separate tweeter placement, and 4-position tweeter level
  • tweeter mounts for separate or coaxial installations included
  • phase plug provided when tweeter mounted separately
  • power range: 25-75 watts RMS (150 watts peak)
  • frequency response: 48-25,000 Hz
  • sensitivity: 90 dB
  • depth: 2-9/16"
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's in the Box:

  • 2 Woofers
  • 2 Tweeters
  • 2 Crossovers
  • 2 Woofer grilles
  • 2 Flush mount tweeter housings
  • 2 Surface mount tweeter housings
  • 2 Coaxial mount tweeter fixtures
  • 2 Metal spring clips for tweeter fixtures
  • Two M4x30mm Pan-head machine screws
  • 2 Crimp-on 0.187" Male quick slides
  • 2 Crimp-on 0.110" Male quick slides
  • 2 Crimp-on 0.25" Female quick slides
  • 2 Crimp-on 0.187" Female quick slides
  • 4 Crimp-on 0.110" Female quick slides
  • 12 Crimp-on spade connectors
  • Four 1" Flat head self-tapping screws
  • Twelve 1-1/8" Pan head self-tapping screws
  • 8 Speed clips
  • Owner's manual
  • Woofer cutout template

I recently installed these speakers in my 2003 Honda Civic sedan with the tweeters on axis on the a pillars head unit is A pioneer deh 80 prs with a mosconi as 100.4 amp and all I can say is wow great staging and powerful clean sound

Steve, Vancouver bc


JL Audio C3-650 Reviews

Average Customer Review(s):

(5 Reviews)

JL Audio C3-650

Steve from Vancouver bc on 12/29/2016

I recently installed these speakers in my 2003 Honda Civic sedan with the tweeters on axis on the a pillars head unit is A pioneer deh 80 prs with a mosconi as 100.4 amp and all I can say is wow great staging and powerful clean sound

Pros: Well built good midbass when installed in doors that have been sound deadened

Cons: None so far

the terminal on this speaker are cheap

jay from Sidney, OH on 11/16/2014

the speakers sound fantastic but the speaker terminals where you attach the speaker wire are cheap and flimsy.

Pros: Sound

Cons: Cost and terminals are cheap

Boys and girls get ready to rock, or what ever you listen too.

Chas621 from Roscoe, IL on 6/12/2013

2005 GMC Sierra 1500
Crutchfield Customer Review (What's this?)

Been there done that with audio electronics, my son blew the cheaper speakers, I had, won't name them. I have a 2005 GMC Extended cab truck, it had the bose system before I replaced the cheap factory crap. So here's the scoop, these JL Audio C3-650 are not the most expensive or best on the market but these bad boys hold there own. I've been researching replacement speakers for over a month, from Hertz to tin buck two. Like I said been there done that for a long time, since 1983. Now I'm grown up not really, but an electronic engineer. But I love LOUD HARD and CLEAR ROCK N ROLL. I travel the world so you get the picture. What these speakers bring to the table is clear loud music no matter what your kind of music is. I also have two 12's subs keeping the bass. the cross overs are awesome and wont blow, when it gets to hot it cuts off the speaker, and goes into time out and doesn't burn up. I could say a lot more stuff to wow you, but I'll let the speakers do that. I very much recommend these speakers to anybody who cant afford the higher end, by the way I liked them so much I bought another pair, now I'm, really rocking. Just make sure your amp has a HPF filter they are not made for bass. the bass freq will blow them if you go above the recommended spec. My next step will be two 10w6v3d4'S TO really ROCK. By the way Crutchfield goes out of there way to accommodate any and all questions, no question is to dumb for them, the only stupid question is the one not asked.

Pros: The Whole system

Cons: not a thing


Eddie from Knoxville, IA on 4/9/2013

Crutchfield Customer Review (What's this?)

Just hooked these up with a Alpine HU and a Fosgate amp and they sound amazing... they have a clean smooth, rich, bassy sound to them, just enough highs to sound great! I have C3-600's in the front doors that sound about the same, together with a JL Audio bass and they create a music experience.. I've done very little adjusting with the head unit EQ and I've just been amazed,, JL Audio makes some incredible speakers.. I can't say enough about them..

Pros: Good rich clean sound.. They just sound great..

Cons: I have nothing here..

Great when paired with an amp

Joey from Indianapolis on 8/9/2011

2008 Pontiac Grand Prix
Crutchfield Customer Review (What's this?)

I had these installed my a custom shop here in town. Soundsational does excellent work anyone in the Indianapolis area. One of the component sets blew the woofer because i had them running off of the head unit power. Crutchfield immediately sent out a replacement to swap them out, great customer service! I paired these with a JL audio XD600/6 and ran 4 channels to these and the other 2 to the rear speakers. Wow, what a difference. Pair these with a good, clean amp and you are in business.




Hands-on research

Features and Specs

Speaker Size 6 1/2
Design 2-way
Tweeter Design 1" Dome
Impedance (Ohms) 4
Tweeter Composition Silk
Woofer Composition Mineral-filled poly
Woofer Surround Rubber
Parts Warranty 1 Year
Labor Warranty 1 Year
Sensitivity (1W at 1 meter) 90
Sensitivity at 2.83 volts N/A
Frequency Response 48 - 25k Hz
Minimum RMS Wattage 25
Maximum RMS Wattage 75
Peak Power Handling (Watts) 150
Top-mount Depth (Inches) 2 9/16
Bottom-mount Depth (Inches) 2 3/4
Cutout Diameter or Length (inches) 5 9/16

Product Research


Woofers: The JL Audio Evolution C3-650 convertible component system includes 6-3/4" woofers with injection-molded polymer frames, mineral filled polypropylene cones, rubber surrounds, ferrite magnets, and 1" voice coils with Kapton formers. In the center of each cone is a phase plug; the phase plug can be removed and the tweeter mounted in its place to create a coaxial speaker.

Tweeters: The 1" silk dome tweeters are Ferro fluid cooled and use neodymium magnets. Silk is lightweight and great for high frequency extension and efficiency. It is also designed for durability in the extreme automotive environment. Flush mount and surface mount housings are included, along with fixtures to coaxially mount the tweeters to the woofers.

Tweeter Dimensions:

  Frame Diameter Cutout Diameter Mounting Height Mounting Depth
Flush Mount 2.134" 1.875" 0.25" 0.853"
Surface Mount 1.926" Screw holes only 0.981" Screw depth only

Coaxial Mounting: The tweeters can be mounted in the center of the woofers to create coaxial speakers. When the tweeters are mounted to the woofers the speaker is taller; the mounting height increases to 0.775", 0.575" for the tweeter protrusion.

Two-way Crossover System: The C3 component system utilizes a 2-way crossover system with Mylar capacitors and air-core inductors:

  • High Pass: second order (12 dB/octave slope); four tweeter level settings are selectable to compensate for mounting location or orientation; +2.0 dB, Reference, -2 dB, and -4 dB
  • Low Pass: first order (6 dB/octave slope)
  • Midrange Presence: there are three settings that affect the amplitude of the upper midrange response, designed to compensate for mounting location or orientation; choose High, Reference, or Low

Tweeter Protection: The crossover network has an electronic tweeter protection circuit built in; it monitors the current and disconnects the tweeter when it senses and overload. The circuit automatically resets once the overload is removed.

Crossover Wiring: The terminal strip will accept bare wire or spade connectors up to 0.32" wide (the included crimp-on spade connectors are 0.255" wide).

Crossover Dimensions:

  • Width: 3.368"
  • Height: 1.415"
  • Depth: 4.739" (plus wire)

Connection Note: The C3 component system comes with no speaker wire. Instead, a number of spade connectors and quick slides are included in the hardware pack to be crimped onto speaker wire you provide.

Size Classification Note: Crutchfield has traditionally referred to this size speaker as a 6-3/4", while some manufacturers, including JL Audio, call it a 6-1/2". Please refer to the Crutchfield Vehicle Selector to confirm fit in your vehicle.

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

2 questions already asked

If you purchased the product from Crutchfield, feel free to contact our Tech Support team. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer. JL Audio's Customer Service # is 1-954-624-0113. You can also post your question in our forums: Or try our online support center: [ Kenny  Apr 17, 2017 ]  Staff
Yes they can be used without the crossover but the tweeter and woofer are on separate terminals and must have wires ran to each one. IMO I wouldn't run it this way due to unwanted frequencies going to the woofer and tweeter. Also it could possibly change the ohms and cause problems for amplifiers or head units whichever is to be used. [ JOHN  Nov 20, 2014 ]
I am using them as coaxial, but I am certainly using the crossovers. I want the flexibility, and I'm skeptical how the speakers would work without them. They are clearly part of the designed package. My expectation is that they provide protection for the speakers as well as controlling the sound. I'm driving the speakers with 900/5 amp and would not want to risk leaving the crossovers out, so I am making room for them. Each speaker has a pair of terminals, whether you connect them as component or coaxial. I download the installation manuals from the Crutchfield site before buying to better inform my buying choices, and that would probably clear up your question. [ EUGENE  Nov 17, 2014 ]
You have to use the crossovers. [ DANIEL  Nov 16, 2014 ]