Free Shipping On Orders of $100 or More!

Brands We Sell Online Learning

.ai-menu-v12contextcar__category-label { display: flex; } .ai-menu-v12contextcar__list { flex-wrap: wrap; } @media screen and (max-width: 749px) { .ai-menu-v12contextcar__category-label { display: block; min-height: 0; margin: 0; padding: 8px 18px 0; color: #ffffff; font-size: 13px; text-align: center; } .ai-menu-v12contextcar__category-icon { display: none; } }

.ai-menu-v12contextmarine__category-label { display: flex; } .ai-menu-v12contextmarine__list { flex-wrap: wrap; } @media screen and (max-width: 749px) { .ai-menu-v12contextmarine__category-label { display: block; min-height: 0; margin: 0; padding: 8px 18px 0; color: #ffffff; font-size: 13px; text-align: center; } .ai-menu-v12contextmarine__category-icon { display: none; } }

.ai-menu-v12contextoffroad__category-label { display: flex; } .ai-menu-v12contextoffroad__list { flex-wrap: wrap; } @media screen and (max-width: 749px) { .ai-menu-v12contextoffroad__category-label { display: block; min-height: 0; margin: 0; padding: 8px 18px 0; color: #ffffff; font-size: 13px; text-align: center; } .ai-menu-v12contextoffroad__category-icon { display: none; } }

.ai-menu-v12contextmotorcycle__category-label { display: flex; } .ai-menu-v12contextmotorcycle__list { flex-wrap: wrap; } @media screen and (max-width: 749px) { .ai-menu-v12contextmotorcycle__category-label { display: block; min-height: 0; margin: 0; padding: 8px 18px 0; color: #ffffff; font-size: 13px; text-align: center; } .ai-menu-v12contextmotorcycle__category-icon { display: none; } }

.ai-menu-v12contextsecurity__category-label { display: flex; } .ai-menu-v12contextsecurity__list { flex-wrap: wrap; } @media screen and (max-width: 749px) { .ai-menu-v12contextsecurity__category-label { display: block; min-height: 0; margin: 0; padding: 8px 18px 0; color: #ffffff; font-size: 13px; text-align: center; } .ai-menu-v12contextsecurity__category-icon { display: none; } }

.ai-menu-v12contextjeep__category-label { display: flex; } .ai-menu-v12contextjeep__list { flex-wrap: wrap; } @media screen and (max-width: 749px) { .ai-menu-v12contextjeep__category-label { display: block; min-height: 0; margin: 0; padding: 8px 18px 0; color: #ffffff; font-size: 13px; text-align: center; } .ai-menu-v12contextjeep__category-icon { display: none; } }

.ai-menu-v12contextbronco__category-label { display: flex; } .ai-menu-v12contextbronco__list { flex-wrap: wrap; } @media screen and (max-width: 749px) { .ai-menu-v12contextbronco__category-label { display: block; min-height: 0; margin: 0; padding: 8px 18px 0; color: #ffffff; font-size: 13px; text-align: center; } .ai-menu-v12contextbronco__category-icon { display: none; } }

.ai-menu-v12contextslingshot__category-label { display: flex; } .ai-menu-v12contextslingshot__list { flex-wrap: wrap; } @media screen and (max-width: 749px) { .ai-menu-v12contextslingshot__category-label { display: block; min-height: 0; margin: 0; padding: 8px 18px 0; color: #ffffff; font-size: 13px; text-align: center; } .ai-menu-v12contextslingshot__category-icon { display: none; } }

.ai-menu-v12contextsmd__category-label { display: flex; } .ai-menu-v12contextsmd__list { flex-wrap: wrap; } @media screen and (max-width: 749px) { .ai-menu-v12contextsmd__category-label { display: block; min-height: 0; margin: 0; padding: 8px 18px 0; color: #ffffff; font-size: 13px; text-align: center; } .ai-menu-v12contextsmd__category-icon { display: none; } }

[data-v12-nav="car"] { display: block; } #main-content > [id$="__blocks_hCTMgB"], #main-content > [id$="__blocks_yjJz6f"], #main-content > [id$="__blocks_PUTw8m"], #main-content > [id$="__blocks_T7Pwye"], #main-content > [id$="__blocks_9rGx8y"], #main-content > [id$="__blocks_4DYc99"], #main-content > [id$="__1789194792dda82df6"], #main-content > [id$="__blocks_zDJEaB"], #main-content > [id$="__blocks_fkXJPY"], #main-content > [id$="__blocks_c6wpgJ"], #main-content > [id$="__blocks_npUM97"] { display: none !important; } @media (max-width: 749px) { [data-v12-nav] [data-menu-list] { display: flex; } [data-v12-nav] [class$="__toggle"] { display: none; } [data-v12-nav] [class$="__submenu"] { display: block; position: static; visibility: visible; opacity: 1; pointer-events: auto; } }

18" Car Subwoofers collection at 12 Volt Outlet

18" Car Subwoofers

(39 products)

18-inch car subwoofers bring large-format bass to custom car audio builds, and we carry options for a range of power levels and system plans. Compare voice-coil configurations, power handling and enclosure guidance to find a subwoofer that fits your build.

High-output 18-inch subwoofers

For a high-power setup, the Team GP Undertaker V2 is rated at 5,000W RMS and offers dual 1- or 2-ohm coils. The Sundown Audio SDDN 18-inch Limited Edition Competition Subwoofer handles 3,500W RMS and has a recommended 7.0 cu ft ported enclosure tuned to 32 Hz.

Compare voice coils and power handling

Voice-coil options affect how a subwoofer can be wired to your amplifier, so check the configuration before you choose. The Audiopipe TXX-BDC-IV-18D2 pairs dual 2-ohm voice coils and a Kevlar fiber composite cone with 1,700W RMS power handling. Its dual 4-ohm counterpart, the Audiopipe TXX-BDC-IV-18, also handles 1,700W RMS.

Plan your 18-inch subwoofer enclosure

Check the enclosure recommendations for your chosen model and make sure your vehicle has room for the subwoofer and box. Ported designs can have specific volume and tuning guidance, while some models list sealed or other enclosure options. Match the enclosure plan to the product details and your system goals before installation.

Looking at other sizes? Browse our Car Subwoofers, 15-inch Car Subwoofers and 12-inch Car Subwoofers to compare more options.