New Look!
• 21" High Performance Carbon Fiber Subwoofer
• Sealed Enclosure Design
• Beauty Baffle included (1/2" HDF)
• Magnetic Grille included (3/4" HDF)
• RBH DA-2602DSP included in package.


Terms and Conditions

You will be astounded at the depth and realism this powerhouse subwoofer will bring to your viewing and listening adventures. This monster of a subwoofer excels in both movies and music listening with tight and accurate output. The UNRIVALED 21-SF/R is built like a tank, weighing in at 371 lbs and built with the highest quality materials.  The UNRIVALED 21-SF/R includes our DA-2602DSP with carefully tuned DSP calibration to extract every ounce of performance that this monstrous subwoofer is capable of.

The 21" proprietary driver was co-engineered by RBH Sound and Pierce Audio. This groundbreaking, low-distortion design made exclusively for RBH features a carbon fiber cone, shorting cap, copper sleeve and custom machine work. Pierce Audio, a privately held company, has built precision subwoofer and speaker drivers by hand in the Pacific Northwest since 2004. They innovate and engineer the highest quality and resilient subwoofer and speaker drivers for most any application. For more information, please visit