JL Audio CP108LG-W3v3 W3v3 Series 8" 250W Peak Power Handling 4 Ohms, Subwoofer with Ported Low Profile Enclosure
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What's Inside?
- • CP108LG-W3v3 Slot-ported subwoofer enclosure (loaded with one 8W3v3-4 woofer)
- • Black metal grille (installed)
- • Owner's Manual
Why Choose JL Audio CP108LG-W3v3 Enclosed Car Subwoofer?
Excellent Extension and Response Smoothness
The JL Audio CP108LG-W3v3 is a high-quality loaded subwoofer enclosure designed to deliver impressive bass performance for car audio enthusiasts. This compact enclosure houses an 8-inch W3v3 subwoofer known for its deep and accurate bass reproduction. The CP108LG-W3v3 features a sealed design, ensuring tight and controlled bass response while reducing unwanted resonance. The high-grade MDF construction and high-quality carpet finish enhance the enclosure's durability and aesthetics, blending seamlessly with any vehicle interior.
Enhance Sound Quality
With a power handling capability of up to 250 watts RMS, this loaded enclosure provides ample punch and impact for its size. Its compact dimensions allow for easy installation in tight spaces, making it an ideal solution for smaller vehicles or limited installation areas. The CP108LG-W3v3 offers a well-balanced and musical bass performance, enhancing the overall listening experience. Whether you enjoy rock, hip-hop, or electronic music, this loaded enclosure delivers impressive bass depth and accuracy.
Sleek Design
The JL Audio CP108LG-W3v3 loaded enclosure is a great choice for those seeking a space-saving solution without compromising on bass quality. Its combination of performance, durability, and sleek design makes it an excellent addition to any car audio setup.
Frequently Asked Questions (FAQ)
- • Why does my CP108LG-W3v3 cut out when I turn the volume up high?
Your amplifier is likely clipping and hitting protection mode, or your factory stereo is cutting bass to protect stock speakers. Re-calibrate your amplifier gains or install a Line Output Converter (LOC) to fix it.
- • Why am I getting loud audio distortion or muddy playback?
Your amplifier is sending a distorted square-wave signal. This happens if the amp gain is set too high or "Bass Boost" is active. Turn off bass boost and lower the gain knob.
- • Will this MicroSub box fit behind the seat of my tight crew cab truck?
Yes. Its slim 5.125-inch depth fits most trucks. However, on very tight models like the Toyota Tacoma Double Cab, you must remove the plastic factory storage bins behind the seat to let the box sit flat.
- • Can I mount this enclosure flat on the floor with the subwoofer firing down?
No. Laying it face-down chokes the slot port and blocks the speaker cone's movement. Mount it vertically, or lay it flat on its back with the woofer and grille facing straight up.
- • How can I stop the speaker wires from getting bent or damaged?
The straight binding posts can catch on cargo. Secure your speaker wires flush against the box using wire clips, or use right-angle banana plugs for a safer, low-profile connection.
- • Why doesn't the sub deliver deep, room-shaking bass on hip-hop tracks?
This compact 8-inch driver is tuned for clean accuracy rather than massive volume. Low-end sub-bass frequencies below 35Hz naturally roll off faster than they would on a larger setup.
- • What size amplifier should I pair with this enclosure?
Use a monoblock amplifier that outputs between 100W and 250W RMS cleanly at a 4-ohm load. Do not use an amplifier rated for 500W+ RMS, as overpowering will damage the driver.
Learn how to wire subwoofers

- Diameter : 8 Inch
- Sensitivity : 83 dB
- Impedance : 4 Ohm
- Frequency Response : 28-250 Hz
- Number Of Subwoofers : 1
- Enclosure Type : Ported
- RMS Power Handling : 250 Watts
Features:
- Subwoofer: Single 8W3v3-4
- Power Handling: 250 W, 4 Ω
- Enclosure Type: Ported
- Design: MicroSub™ system with efficient slot-ported design
- Internal Bracing: Extensive bracing allows for thinner wall material and maximizes internal volume
- Port Design: Port wraps around two walls for low tuning frequency and smooth response; flared port entry and exit reduce air-flow noise
- Finish: Black high-grade automotive carpet with silver "JL AUDIO" embroidery on the front baffle
- Protection: Includes a steel mesh grille for woofer protection
- Construction: CNC-Cut High-Grade MDF
- Ready to Connect: Wired, loaded, and includes a five-way binding post terminal
- Recommended Amplifier Power: 100 - 250W
- Nominal Impedance: 4 Ω
Specifications:
- Woofer Size: 8 inches
- Speakers Per Box: 1
- Woofer Material: Polypropylene
- Enclosure Type: Ported
- Color: Black
- Pieces in System: 1
- Width: 18-5/8 inches
- Height: 11-1/8 inches
- Depth: 6-5/8 inches
- Connector Type: 5-way posts
- Frequency Response: 28-250 Hz
- Power Range (Watts RMS): 250
- Maximum Wattage: 250
- Sensitivity: 83 dB
- Impedance: 4 ohms
- UPC: 699440931335
- Weight: 20
- Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for repair within 1 year from the original date of purchase with proper return authorization.
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Write a review!
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Installed in the back of my 09 Nissan 370Z. This box provides excellent bass you feel. It’s compact and light, perfect for a sports car. Teamed up with a JL Audio Slash 250 1v2 mono block amp, provides ample sound for my tastes.
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I heard two of these in a 95 single cab Chevy and I was blown away by how much bass they provide. These sound better than my two 12 inch Rockford fosgate r2 subs in my single cab Colorado. If you want something small that produces great bass get these subs. I promise they won't let you down.
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Dropped a couple of these subs in my Tacoma, and now the truck's thumping with the bass it was missing. One sub might be plenty, but hey, I'm a bass junkie, always craving more lows.