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JL Audio C3-600

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

Item # 136C3600

The C3-600 component system uses a 6-1/2" mica-filled polypropylene woofer that covers the midrange and low...

Read more from Crutchfield writer, John P.

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About the JL Audio C3-600

Versatile speaker system for any space

The C3-600 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 C3-600 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.

Note: JL Audio describes this model as a 6" speaker. Most manufacturers designate this same frame size as a 6-1/2" speaker. For simplicity's sake we list it as a 6-1/2" speaker.

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


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
  • handles up to 75 watts RMS (225 watts peak)
  • frequency response: 50-25,000 Hz
  • sensitivity: 89.5 dB
  • depth: 2-1/2"
  • grilles included
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # 99034

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 7/8" Flat head self-tapping screws
  • Twelve 1-1/8" Pan head self-tapping screws
  • 8 Speed clips
  • Owner's manual
  • Woofer cutout template

Customer reviews

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JL Audio C3-600 Reviews

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More details on the JL Audio C3-600

Features & specs

Speaker Size 6
Design 2-way
Tweeter Design 1" Dome
Impedance (Ohms) 4
Tweeter Composition Silk
Woofer Composition Mineral-filled poly
Woofer Surround Butyl Rubber
Parts Warranty 1 Year
Labor Warranty 1 Year
Sensitivity (1W at 1 meter) 89.5
Sensitivity at 2.83 volts N/A
Frequency Response 50 - 25k Hz
Minimum RMS Wattage 25
Maximum RMS Wattage 75
Peak Power Handling (Watts) 225
Top-mount Depth (Inches) 2 1/2
Bottom-mount Depth (Inches) N/A
Cutout Diameter or Length (inches) 5

Product Research


Woofers: The JL Audio Evolution C3-600 convertible component system includes woofers with injection-molded polymer frames, mineral filled polypropylene cones, butyl rubber surrounds, ferrite magnets, and 1.2" 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" 0.35" 0.853"
Surface Mount 1.926" Screw holes only 0.885" 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 0.8".

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

  • High Pass: third order (18 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: 1.425"
  • Depth: 4.75" (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.

Power Handling: JL Audio publishes several power specifications for this speaker, 75 watts continuous power handling (RMS), 225 watts peak music power, and 25-150 watts recommended amplifier power (RMS). We've listed the conservative combination of 25-75 watts RMS in the specs table.

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Customer Q&A

Crutchfield asked: Why did you buy this?
upgrade from what is currently in car. [ Vernon  Nov 21, 2018 ]
Recommended by friends [ Randy  Jan 24, 2018 ]
Great set of speakers at a good price. [ jason  Oct 11, 2017 ]
Amazing sound. High powered. Good quality. [ JOSH A  Jun 22, 2017 ]
I had C3s in a previous vehicle, best components I've ever heard. Beats those other brands easily [ daryl  Apr 03, 2017 ]
Because I need high quality sound [ Eric  Mar 11, 2016 ]

4 questions already asked

Does the cross over have to be installed close to the speakers or can it be mounted remotely?
[ Manic  Sep 13, 2018 ]
2 answers
You can mount them anywhere you want.
[ William  Sep 13, 2018 ]
It can be installed pretty much anywhere you want. Each channel had its own crossover, in a small plastic "box." Wires run into box from headunit and out to the speakers.
[ Hunter  Sep 13, 2018 ]
What is the "convertible" feature that some buyers have talked of? These are called convertible speakers; I must have missed something in the product description because I still don't know what that means.
[ James  May 17, 2018 ]
1 answer
"Convertible" refers to the fact that the tweeter unit can be mounted separately from the woofer, or can be mounted co-axially in the driver. The owner/installer has the option of either placement. A phone call to JL Audio and/or Crutchfield can work through any more questions on the issue. The speakers are excellent in either configuration.
[ Hunter  May 17, 2018 ]
Do you need to run an amp to these speakers? Is 18w RMS going to do the job?
[ Slate Terreno  Dec 03, 2017 ]
3 answers
Not if you want the quality of sound these speakers are made to produce. I ran a JL amp pushing 125 Watts RMS to each and they sound amazing.
[ MATT  Dec 03, 2017 ]
You will want a amp to get the most out of them
[ Brandon  Dec 03, 2017 ]
18 Watts can be enough for these speakers if the amp giving them is a reputable amp. You don't need an amp to run these speakers; just don't expect good bass response from them if you're going to feed them your stock car radio wattage. I would suggest an independent amp for best performance. With my setup (Soundstream amp PN4.520D) I get very good bass response for their size. I do have a 80Hz high pass going to them. I also have a dedicated subwoofer for my setup. Sound quality is very good!
[ Soso  Dec 03, 2017 ]
will the c3-570 convertable speakers fit the rear seat panels as well or do you have to buy the c3-600?
[ mhaynes1  Aug 15, 2015 ]
1 answer
For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle.
[ Krissy  Aug 17, 2015 ]  Staff

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