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Bass ReFLEX™ Passive Radiators
Get all the low-end performance of a ported enclosure in a fraction of the air space.

Your Enclosure. Your Way.

Now you have the freedom to create a custom box in the shape you want, in the color you want, with the materials you want. You’ll make a custom enclosure that fits under a seat, behind the back bench or in the trunk with ease!

8-inch Box|49Hz

Your shape - our size. We custom weighted the KBRWs to exacting specifications, so you get the perfect tune. All it needs is the right active sub in the recommended airspace for some serious custom bump!

For optimal results, use an 8-inch CompRT subwoofer in 0.4 cubic feet of internal air space.

10-inch Box|41Hz

For optimal results, use a 10-inch CompRT or CompVT subwoofer in 0.5 cubic feet of internal air space.

12-inch Box|34Hz

For optimal results, use a 12-inch CompRT or CompVT subwoofer in 0.7 cubic feet of internal air space.



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Contact Support

Technical Support
(405) 624-8583
8am - 5pm CST

Warranty Support
(405) 624-8510
8am - 5pm CST

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