JL Audio ACP108LG-W3V3 Single 8W3v3 MicroSub+™ 8" with DCD™ 250W 0.4 Ohms, Class-D Amplifier Ported Subwoofer Enclosure
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What's Inside?
- • 8" Single 8W3v3 MicroSubClass-D Amplifier Ported Subwoofer Enclosure
- • Black metal grille (installed)
- • Power connection plug (installed)
- • 30-amp ATO fuse (installed)
- • 12" Speaker level amplifier input harness
- • Specification card
- • Warranty information
- • Owner's Manual
Why Choose JL Audio ACP108LG-W3V3 Powered Subwoofer?
High Output Enclosures
The JL Audio ACP108LG-W3V3 is a compact and powerful all-in-one powered subwoofer enclosure designed to deliver exceptional bass performance for car audio enthusiasts. This premium enclosure features a single 8-inch W3V3 subwoofer, known for its deep and accurate bass reproduction. The ACP108LG-W3V3 combines the subwoofer with a built-in 250-watt Class D amplifier, maximizing the subwoofer's potential and providing effortless power for a satisfying bass experience without needing an external amplifier.
Extensive Real-world Listening
The enclosure features a ported design, allowing the subwoofer to move air efficiently, increasing bass output and overall impact. The ACP108LG-W3V3 is expertly constructed using high-quality materials, ensuring durability and minimizing resonance for superior sound quality. Its compact and slim design, the ACP108LG-W3V3 can be easily installed in various car models and tight spaces. Its versatility makes it an ideal solution for space-saving and high-performance bass upgrades.
All-in-one Powered Subwoofer
Whether you listen to hip-hop, rock, or jazz, the JL Audio ACP108LG-W3V3 all-in-one powered subwoofer enclosure delivers a well-balanced and immersive bass experience that will elevate your car audio system to new levels. Enjoy deep, impactful bass that enhances your driving journey and adds a new dimension to your favorite tunes.
Frequently Asked Questions (FAQ)
- • Why doesn't my JL Audio ACP108LG-W3V3 turn on when I start my car?
Check the power, ground, and remote turn-on connections. A blown fuse or poor ground is the most common cause.
- • Can I connect the ACP108LG-W3V3 to my factory stereo without RCA outputs?
Yes. The built-in amplifier accepts high-level speaker inputs, making it compatible with most factory audio systems.
- • Why is the bass weaker than I expected from the enclosure?
Incorrect gain settings, subwoofer polarity, or poor enclosure placement in the vehicle can reduce bass output.
- • Can I mount the enclosure vertically against the back seat?
Yes. It can be mounted in different positions as long as it is securely fastened and has adequate ventilation.
- • Why does the built-in amplifier shut off after playing loud music for several minutes?
This usually indicates thermal protection caused by restricted airflow or low speaker impedance.
- • Does the ACP108LG-W3V3 support an optional remote bass level control?
Yes. It is compatible with JL Audio's optional remote bass control for convenient level adjustment from the driver's seat.
- • Why do I hear a humming noise from the subwoofer when the engine is running?
This is commonly caused by a grounding issue or signal cables routed too close to the vehicle's power wiring.
- • Can I add another passive subwoofer to the built-in amplifier?
No. The amplifier is designed specifically to power the included W3v3 subwoofer.
- • Why does the Auto Turn-On feature not work with my factory radio?
Some factory systems do not provide a strong enough signal for automatic turn-on. Using a remote turn-on lead usually solves the issue.
- • Can I remove the built-in amplifier and use an external amplifier later?
Yes. Many owners upgrade to an external amplifier, but proper wiring modifications will be required.
Learn how to wire subwoofers

- Diameter : 8 Inch
- Impedance : 0.40 Ohm
Features:
- Compact 8" Subwoofer: The ACP108LG-W3v3 features one 8" W3v3 low-impedance subwoofer in a ported enclosure, ideal for small cars or hatchbacks.
- 250W RMS Class D Amplifier: Built-in amplifier delivers 250 watts RMS at 0.4 ohms with high efficiency (91–94%) and minimal heat.
- JL Audio DCD Technology: Direct power conversion with ultra-high current output ensures clean, deep bass in a compact package.
- Ported Enclosure with Flared Slot Port: Side-firing port reduces turbulence and enhances bass fidelity. Port opening measures 1-3/8" × 4".
- Durable Build: MDF cabinet covered in automotive-grade carpeting, with black steel-mesh grille protecting the driver.
- Flexible Inputs: Accepts RCA line-level or speaker-level signals; includes 12" speaker-level input harness.
- Quick-Disconnect Terminal Block: Power, ground, and remote wires plug into a removable terminal block for easy removal or storage access.
- Remote Bass Ready: Optional JL Audio RBC-1 wired Remote Bass Control allows front-seat bass adjustments (sold separately).
- Customizable Controls: Variable input sensitivity, adjustable low-pass crossover (50–200 Hz, 12 dB/octave), turn-on mode selection, and phase switch (0°/180°).
- Thermal Protection: Built-in protection circuit shuts down amplifier in case of overheating.
Specifications:
- Subwoofer: 1 × 8" W3v3 low-impedance (0.4Ω)
- Enclosure Type: Ported
- Amplifier Type: Built-in Class D
- Power Output: 250 Watts RMS at 0.4 ohms
- Low-Pass Filter: 50–200 Hz, 12 dB/octave
- Woofer Material: Injection-Molded Poly
- Enclosure Material: MDF with automotive carpeting
- Inputs: RCA line-level and speaker-level
- Wiring Requirement: 8-Gauge Amp Kit (sold separately)
- Fuse Rating: 30A
- Dimensions: 18-1/2" W × 11-1/8" H × 5-1/8" D (6-5/8" D including grille)
- Condition: Brand New
- UPC: 699440933308
- Weight: 25
- 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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After seeing all of the negative reviews regarding Online Car Stereo, I was a little nervous of placing an order. But the fact that this JL Sub was impossible to find anywhere and that there was a 10% discount as well as free shipping I went ahead and ordered it. It was the genuine real deal and it sounds great. Also, it shipped and arrived in no time.
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excellent equipment
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It's a compact sub but the sound is gigantic! Its pricey but the built-in amp has become handy as I do not have to find one to pair with the sub. Doesnt take too much space too.