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

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.

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.