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18 Inch Car Subs

If you're looking for a way to add muscle to your car's sound system, or just want to take the edge off the bass when you're driving down the road, a set of subwoofers is a great place to start. Browse the top-ranked list of 18-inch car subs below along with associated reviews and opinions. 

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  1. 5 CORE - 5Core 18" Subwoofer Speaker 600W RMS 8Ohm Replacement Audio PA DJ Sub Woofer-FR 18 190 MS - Black

    SKU: J3GWXXTP95

    Product Description

    Product Details Description: Upgrade your sound system with this 18 inch full range speaker woofer, delivering 600W RMS and 1200W max power. Equipped with a robust 96 Oz ferrite magnet and a 4 inch copper voice coil, this replacement speaker offers exceptional clarity and durability. With a sensitivity of 93 dB, it efficiently converts power to sound, making it ideal for any setup. The cloth-edge...
    See all 15" Subwoofers & Enclosures
    Your price for this item is $99.99

  2. 5 CORE - 5Core 18" Subwoofer Speaker 600W RMS 8Ohm Replacement Audio PA DJ Sub Woofer-FR 18 190 AL - Black

    SKU: J3GWXXTP6X

    Product Description

    Product Details Description: Upgrade your sound system with this 18 inch full range speaker woofer, delivering 600W RMS and 1200W max power. Equipped with a robust 96 Oz ferrite magnet and a 4 inch copper voice coil, this replacement speaker offers exceptional clarity and durability. With a sensitivity of 93 dB, it efficiently converts power to sound, making it ideal for any setup. The cloth-edge...
    See all 15" Subwoofers & Enclosures
    Your price for this item is $110.99
    Save $111
    The previous price was $222.00
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In-store pricing may vary. Prices and offers are subject to change. © 2026 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, and MY BEST BUY are trademarks of Best Buy and its affiliated companies.