18" Car Subwoofers

For those who demand the absolute maximum in bass output, shop 12 Volt Outlet's selection of 18" car subwoofers — the largest, most powerful subwoofers in car audio, built exclusively for competition SPL, extreme builds, and the enthusiasts who refuse to settle for anything less than the most bass physically possible.

An 18" subwoofer is in a class of its own. The sheer cone area and excursion capability of an 18" driver produces bass pressure levels that smaller subwoofers cannot approach — chest-collapsing, window-flexing, record-setting output that defines the top end of the SPL competition world. These are not daily driver woofers. These are statement pieces engineered for builds where maximum output is the only metric that matters.

18" subwoofers require large, purpose-built ported or bandpass enclosures tuned specifically to the driver's Thiele-Small parameters, and high-powered mono amplifiers capable of delivering thousands of watts cleanly and continuously. Done right, an 18" build is an experience unlike anything else in car audio.

Shop 18" subwoofers in single and dual voice coil configurations with 1-ohm, 2-ohm, and 4-ohm impedance options for flexible pairing with the highest-powered mono amplifiers available. Built to handle extreme power levels with robust motor structures, oversized voice coils, and high-excursion suspensions designed for the most demanding competition environments.

We carry 18" car subwoofers from the most respected brands in the industry including Rockford Fosgate, B2 Audio, Soundqubed, Orion, Massive Audio, Audio Ace, DC Audio, Resilient Sounds, AudioControl, Jensen, Nemesis, Powerbass, JBL, Infinity, and more — brands that push the limits of what a subwoofer can do.

Free shipping on orders over $100. Shop 18" car subwoofers at 12 Volt Outlet today — and build something legendary.