Proline X Downfire Series

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Need bass that blends seamlessly into your vehicle? Our downfire subwoofer boxes are designed to project sound downward, maximizing output while protecting your subwoofers from damage. Perfect for trucks and SUVs, these enclosures deliver powerful bass without taking up usable cargo space. Free shipping and a 2-year warranty included.

Proline X Downfire Series - Audio Intensity

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Proline X Downfire Series

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Limited Edition: Audiomobile 10" Dual Enclosure Bundles

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$ 125.00
Audiomobile Limited Edition 10" Dual Enclosure Bundle Collection Experience powerful sound with the Audiomobile Limited...
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Proline X Downfiring Single 12" Sub Enclosure - Hertz

$ 199.99
Proline X Single 12" Downfiring Sealed Sub Enclosure (Hertz Edition): Elevate Your Audio Experience. When...
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Proline X Downfiring Single 10" Sub Enclosure - Hertz

$ 199.99
Elevate Your Audio Experience with the Proline X Single 10" (Hertz Edition) Downfiring Enclosure  When...
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Eton M10 10 Eton M10 10
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Eton M10 10" Subwoofer System

$ 279.00 $ 449.99

Eton M10 10" Subwoofer System

$ 279.00 $ 449.99
Save $ 170.99
**CLOSEOUT SALE: LAST CHANCE TO SAVE BIG!**Don't miss your opportunity to grab the Eton M10...
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Micro Series Sealed Down fire Enclosure for Triple 10 inch

$ 279.99
Micro Series Sealed Down fire Enclosure for Triple 10-Inch Subwoofers Enhance your car audio system...
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Flex Series Down Fire Subwoofer Box for Image Dynamics

$ 279.99
Proline-X Flex Series Downfire Subwoofer Box Maximize the impact of your sound system with a...
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Flex Series Down Fire Subwoofer Box - 1 Cubic Foot

$ 279.99
Introducing the Proline-X Flex Series Downfire Subwoofer Box, a game-changing enclosure designed for maximum customization and...
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Flex Series Down Fire Subwoofer Box for Audiomobile Subwoofers

$ 279.99
Proline-X Flex Series Downfire Subwoofer Box Unleash deep, resonant bass in a space-efficient design crafted...
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Flex Series Down Fire Subwoofer Box for Arc Audio Subwoofers

$ 279.99
Arc Audio A-Series Downfire Subwoofer Box Enjoy powerful bass in a compact design made specifically...
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Micro Downfire Sealed Enclosure for Audiomobile 10" subwoofer with Passive Radiator

$ 299.99
Micro Downfire Sealed Enclosure for Audiomobile 10-Inch Subwoofer Experience powerful, clean bass in a compact...
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Loaded Dual Wavtech thinPRO12 Subwoofers - Proline-X Micro Series Sealed Enclosure

$ 1,599.99
Experience Uncompromising Bass in a Space-Saving Design The Dual Wavtech thinPRO12 in Proline-X Micro Series...
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All About Downfire Subwoofer Boxes

A downfire subwoofer box positions the woofer downward, bouncing sound off the vehicle floor for a fuller bass response. This design also shields the subwoofer cone, making it a great choice for trucks, SUVs, and other vehicles where durability and protection matter.

Audio Intensity builds downfire enclosures in sizes ranging from 8 inch to 15 inch. Each Proline-X box is engineered for proper airspace and tuning, using CNC-cut MDF, internal bracing, and professional carpet finishes. These boxes are especially popular in direct-fit truck enclosures, where space efficiency and durability are essential.

For maximum SPL, check out our ported enclosures. For tight, accurate bass, our sealed options deliver precision. Downfire boxes remain the best mix of output, protection, and stealth installation.

Proline X Downfire Series

Frequently Asked Questions

What subwoofer sizes are compatible with this enclosure?

How durable is the Proline X Downfire Series?

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Does the enclosure support multiple subwoofer brands?

What vehicles are best suited for this enclosure?

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