Kicker SoloX L7X Subwoofers — 8, 10, 12, 15 & 18-Inch Competition Subs

Experience the full Kicker SoloX L7X lineup — from 8-inch daily drivers to the massive 18-inch SPL monster. Extreme power, durability, and innovation in every size..

The Kicker SoloX L7X Subwoofer Series represents the pinnacle of competition-grade bass. Available in 8, 10, 12, 15, and 18-inch models, these drivers are engineered for enthusiasts who demand maximum output, durability, and innovation. Each subwoofer features Kicker’s patented square cone design, providing up to 20% more surface area for greater air movement and deeper bass than traditional round subs. With power ratings from 1000W RMS up to 4000W RMS, the SoloX family covers everything from compact daily installs to the most extreme SPL competition builds. Browse the lineup below to find the perfect size and configuration for your system.

Kicker SoloX L7X Subwoofers — 8, 10, 12, 15 & 18-Inch Competition Subs

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Kicker SoloX L7X Subwoofers — 8, 10, 12, 15 & 18-Inch Competition Subs

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Kicker Solo X 8" Subwoofer Box - Professional Series Enclosure

$ 349.99
The Kicker Solo X 8" subwoofer box delivers uncompromising competition-grade bass performance in a highly compact footprint,...
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Kicker Solo X 10" Subwoofer Box - Professional Series Enclosure for Compact High-Performance Bass

$ 499.99
The Kicker Solo X 10" subwoofer box delivers uncompromising competition-grade bass performance in a more...
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Kicker Solo X 10" L7X Competition Subwoofer

$ 699.99
The Kicker Solo X 10 represents the pinnacle of competition-grade subwoofer engineering, delivering unprecedented bass...
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Kicker SoloX L7X 12 inch Subwoofer

$ 749.99
The Kicker SoloX L7X 12-inch Subwoofer is engineered for bass enthusiasts who demand extreme performance...
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Kicker Solo X 12" Subwoofer Box - Professional Series Enclosure for Ultimate Bass Performance

$ 749.99
The Kicker Solo X 12" subwoofer box represents the pinnacle of professional bass enclosure engineering,...
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Kicker Solo X 15" L7X Competition Subwoofer

$ 799.99
The Kicker Solo X 15" L7X represents the pinnacle of competition-grade subwoofer engineering, delivering unmatched...
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Professional Box for Kicker Solo X 15" - Proline X

$ 999.99
Welcome to the pinnacle of professional-grade audio with the Proline X—Professional Series Enclosure. Designed for...
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Professional Series Enclosure for Dual Kicker Solo X 12" - Proline X

$ 1,250.00
Upgrade your car audio system to the next level with the Proline X - Professional...
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Professional Series Enclosure for Dual Kicker Solo X 15" - Proline X

$ 1,750.00
Welcome to the pinnacle of professional-grade audio with the Proline X—Professional Series Enclosure. Designed for...
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Proline X Professional Series Loaded Subwoofer Box - Kicker SoloX 15 inch

$ 1,899.99
Revolutionary Bass Performance: Kicker SoloX L7X 15" & Proline X Professional Series Combination Experience the...
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Professional Series Enclosure for Dual Kicker Solo X 18" - Proline X

$ 2,250.00
Welcome to the pinnacle of professional-grade audio with the Proline X—Professional Series Enclosure. Designed for...
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Proline X Professional Series Loaded Subwoofer Box - Dual Kicker SoloX 15 inch

$ 3,499.99
Experience Groundbreaking Bass Performance with Kicker Solo X 15" Subwoofers The combination of dual Kicker...
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All About Kicker SoloX L7X Subwoofers


The Kicker SoloX L7X series is built for one purpose: delivering uncompromising bass. From the compact 8-inch SoloX to the massive 18-inch powerhouse, every model incorporates cutting-edge technology designed for both sound quality and sheer volume.

Key innovations include the patented square cone, which increases cone area for louder, lower bass; a massive 31.25 mm Xmax for extreme excursion; and Forced-Air Cooling™, which prevents heat buildup during long sessions. Each driver also features a field-replaceable recone system, allowing quick repairs without replacing the entire subwoofer — a game-changer for serious competitors and daily drivers alike.

  • SoloX 8 & 10 → Ideal for compact systems needing high power in limited space.
  • SoloX 12 & 15 → Balanced options for competition-level output and daily use.
  • SoloX 18 → The ultimate in SPL performance, built for extreme enclosures and massive power.

Paired with the right monoblock amplifier and a precision-engineered enclosure, the SoloX series pushes performance to levels few subs can match. Whether you’re chasing trophies or just want earth-shaking bass for your ride, Kicker SoloX L7X subwoofers deliver the power, reliability, and innovation that have made Kicker a leader in car audio.

Proline X Professional Series Loaded Subwoofer Box - Kicker SoloX 15 inch|Proline X|Audio Intensity

Kicker SoloX L7X Subwoofers — 8, 10, 12, 15 & 18-Inch Competition Subs

Frequently Asked Questions

What sizes are available in the Kicker SoloX L7X series?

What is the power range for SoloX subwoofers?

What makes SoloX different from other subs?

Do SoloX subs work in sealed or ported enclosures?

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