Short answer: the Perlisten Audio R212s. Both are rated 4.1/5 for sound quality (#87 and #91 of 143 subwoofers), and the Perlisten Audio R212s costs $5,000 against $11,995 for the RBH Sound Unrivaled 21-SF/R, with sound quality a draw, the lower price decides it.
Why pick the RBH Sound Unrivaled 21-SF/R: A colossal sealed subwoofer with a 21 inch carbon fiber driver and extraordinary deep bass output for the biggest home theaters. The tradeoff: At about 151kg (333 lbs), moving or placing this cabinet is a multi-person job.
Why pick the Perlisten Audio R212s: A sealed dual 12 inch subwoofer with strong, punchy upper bass for movie effects and music, plus XLR and RCA inputs. The tradeoff: Deep-bass output is more limited than the strong 40-80 Hz result suggests, so it is not the right choice when the lowest movie effects are the priority.
Buy the Perlisten Audio R212s. Both are rated the same for sound quality, and it costs $6,995 less than the RBH Sound Unrivaled 21-SF/R.
Still deciding? The full Subwoofers rankings cover every ranked option.
Prices on this page were last checked November 14, 2026 at 6:17 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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Specifications Side By Side
| RBH Sound Unrivaled 21-SF/R | Perlisten Audio R212s | |
|---|---|---|
| Price | $11,995 | $5,000 |
| Ranked | #91 of 143 in Large Home Subwoofers (Over 75 lbs) | #87 of 143 in Large Home Subwoofers (Over 75 lbs) |
| Warranty | 10/3 | 5 |
| Enclosure | sealed | sealed |
| Output SPL at 10 Hz | 91.3 dB | - |
| Output SPL at 12.5 Hz | 97.7 dB | - |
| Output SPL at 14 Hz | 100.8 dB | - |
| Output SPL at 16 Hz | 105.5 dB | - |
| Output SPL at 20 Hz | 112.3 dB | 102.7 dB |
| Output SPL at 25 Hz | 117.2 dB | 107.7 dB |
| Output SPL at 31.5 Hz | 120.1 dB | 112.1 dB |
| Output SPL at 40 Hz | 119.5 dB | 116.0 dB |
| Output SPL at 50 Hz | 118.7 dB | 118.8 dB |
| Output SPL at 63 Hz | 118.4 dB | 120.6 dB |
| Output SPL at 80 Hz | 118.7 dB | 121.4 dB |
| Output SPL at 100 Hz | 119.2 dB | 121.7 dB |
| CEA-2010-A Average (40-80Hz) | 118.8 dB | 119.2 dB |
| Dimensions | 27.3”H x 43”W x 21”D (692.2 x 1092.2 x 533.4 mm) | 23.6”H x 16.1”W x 19.7”D (599.4 x 408.9 x 500.4 mm) |
| Weight | 332.9 lbs (151.0 kg) | 106 lbs (48.1 kg) |
| Country | United States | United States |
| Measurement Source | Manufacturer | Audioholics |
| Frequency Response | 12-80Hz, ±3dB | - |
| Power Handling | 4000W thermal power handling | - |
| Drivers | 21” carbon fiber driver | 2x 12” (305mm) drivers |
| Output SPL at 15 Hz | - | 98.3 dB |
| Output SPL at 125 Hz | - | 121.9 dB |
| Cabinet Color | - | black |
| Inputs | - | RCA (2), XLR (2) |
| XLR Input | - | Yes |
| RCA Input | - | Yes |
| TRS Input | - | No |
| Optical Input | - | No |
| Coaxial Input | - | No |
| USB Input | - | No |
| HDMI Input | - | No |
| AES Input | - | No |
| Aux Input | - | No |
Where the Ratings Come From
- RBH Sound Unrivaled 21-SF/R: manufacturer specifications and listening comparisons; no independent measurement has been published yet.
- Perlisten Audio R212s: manufacturer specifications and listening comparisons; no independent measurement has been published yet.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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