JL Audio C2-650X 6.5″ 2-Way Coaxial Speakers – Pair – #99618

Brand: JL Audio
Model Number: C2-650X
UPC: 699440996181
Model Number: C2-650X
UPC: 699440996181
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JL Audio C2-650X #99618 – 6.5″ Coaxial Speakers

  • 2-way 6-3/4″ speakers (pair)
  • injection-molded mica-filled polypropylene woofer
  • 3/4″ silk dome tweeter
  • built-in crossover network
  • 4-ohm impedance
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Product Description

Features & Specifications



JL Audio C2-650X #99618 – 6.5″ Coaxial Speakers

The JL Audio C2-650X  systems deliver sparkling high-frequency detail, smooth mid-range and powerful mid-bass, thanks to real silk dome tweeters and precision-engineered woofer designs.  C2-650X features 6.5-inch (165 mm) woofers with mineral-filled polypropylene cones, long excursion capabilities and stamped steel frames. The woofer design benefits from JL Audio’s vast woofer design experience and advanced modeling systems. The 6.5-inch (165 mm) format is a direct fit in many vehicles. Multiple mounting patterns are provided on the woofer frame for easy installation into most vehicles that accept a 6.5-inch (165 mm) speaker. Woofer grilles are included, each consisting of a black grille tray with satin silver accents and a black steel mesh grille with an electroformed JL Audio logo.

JL Audio’s Evolution C2 Series speakers

JL Audio Evolution JL Audio C2-650X speaker systems deliver an impressive audio performance solution and value. The technology of the Evolution C2 Series has been drawn from JL Audio’s experience in woofer and tweeter design. They have been engineered to deliver adequate efficiency while retaining a smooth mid-range response with low-frequency extension. Smoothness of response and the freedom from distortion are factors that make the C2 Series speakers truly one of a kind and enjoyable for everyone, and the resulting product is one that delivers performance for any car audio enthusiast at a price that won’t break the bank!

Silk Dome Tweeter

JL Audio C2 tweeters incorporate silk dome diaphragms to deliver smooth high-frequency transitions, on and off axis. Silk is a natural material with inherently good characteristics as a tweeter diaphragm. In addition to being very light in weight, silk exhibits excellent damping properties, which reduces ringing and resonances in the tweeter’s passband, leading to a smooth, pleasing high frequency character free from unnatural sibilance or exaggerated brightness. This is why a Silk Dome Tweeter is preferred by many audiophiles for its overall balance.

JL Audio Quality, Build and Design

JL Audio Evolution C2 coaxial speaker systems feature mineral-filled polypropylene cones, long excursion capabilities and stamped steel frames. In addition, the woofer design benefits from JL Audio’s vast woofer design experience and advanced modeling systems. It is this use of proper high-quality components and advances that allow the speaker to perform better than any other speaker in its price range. The JL Audio C2-650X, specifically, has a respectable frequency response of 59 Hz – 22,000 Hz, a continuous-power handling of 60 watts and a solid efficiency of 91.0 dB, giving it the ability to produce smooth mid-range and highs.


Woofers: The JL Audio Evolution C2-650x coaxial speakers feature injection-molded, mica-filled polypropylene woofer cones with a butyl rubber surround. Each woofer has a 1″ voice coil on a Kapton Former, a symmetrical roll spider and a Ferrite magnet.

Tweeters: Each coaxial speaker features a ¾” silk dome, ferrofluid-cooled tweeter with a damping neodymium magnet. The edge-driven silk dome tweeter is smooth, detailed (on or off axis), and provides great overall performance. Silk is lightweight and great for high frequency extension and efficiency. It is also designed for durability in the extreme automotive environment.

Size Classification Note: Some manufacturers, including JL Audio, call this size speaker a 6½”. Because it requires a larger cutout than a standard 6½” speaker, Crutchfield has traditionally referred to this size as 6¾”. Please enter your vehicle information to confirm fit.

Grilles: Front-loading protective grilles are included, with black steel mesh and satin silver accents. Electroformed logo nameplates can be positioned on the grilles or elsewhere in the vehicle, according to the needs of the installation.

Power Handling: JL Audio publishes several power specifications for this speaker, 60 watts continuous power handling (RMS), 225 watts peak music power, and 15-100 watts recommended amplifier power (RMS). We’ve listed the conservative combination of 15-60 watts RMS in the specs table.

C2-650X Dimensions:

Lineart Bottom-View and Side-View of C2-600x Coaxial Speaker with dimension labels A-G
Frame Outer Diameter* (A) 6.5 in / 165 mm
Grille Tray Outer Diameter (B) 6.84 in / 174 mm
Motor Outer Diameter (C) 3.15 in / 80 mm
Frontal Coaxial Tweeter Protrusion** (D) 0.45 in / 12 mm
Frontal Grille Protrusion*** (E) 0.85 in / 22 mm
Mounting Hole Diameter (F) 5.56 in / 141 mm
Mounting Depth (G) 2.44 in / 62 mm
Model C2-650X
Product: JL Audio C2-650X 6.5″ 2-Way Coaxial Speakers – Pair – #99618

Speaker Size: 6 1/2"
Design: 2-way
Tweeter Design: Dome
Impedance (Ohms): 4
Tweeter Composition: Silk
Woofer Composition: Mica-filled Polypropylene
Woofer Surround: Butyl rubber
Sensitivity (1W at 1 meter): 91
Sensitivity at 2.83 volts: 94
Frequency Response: 59 – 22k Hz
Minimum RMS Wattage: 15
Maximum RMS Wattage: 60
Peak Power Handling (Watts): 225
Top-mount Depth (Inches): 2 9/16
Cutout Diameter or Length (inches): 5 5/8
Mounting Height (Inches): 0.436

What's in the box

JL Audio C2-650X owner's manual
Two 2-way speakers
2 Grilles
8 Self-tapping screws (#8 x 1-3/16")
8 Speed clips
Two Crimpable female quick slides (0.205"/5.2mm)
2 Crimpable female quick slides (0.11"/2.8mm)
2 JL Audio logo badges
Owner's Manual
Paper template


4 Ω

RMS Power

Up to 35 Watts

Speaker Design

2-Way, Coaxial

Speaker Sensitivity

91 – 95 db

Speaker Size


Tweeter Size

0.75" – .99"

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JL Audio 1 Year Limited Warranty


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