Short answer: the Perlisten Audio R212s. Both are rated 4.1/5 for sound quality (#71 and #75 of 109 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: Manufacturer-supplied CEA-2010 data records 112.3 dB at 20 Hz and 118.8 dB through 40-80 Hz, with a passing result down to 10 Hz. The tradeoff: At around 333 lbs, moving or placing this cabinet is a multi-person job, and the price puts it well outside typical home theater budgets.
Why pick the Perlisten Audio R212s: Independent CEA-2010 testing records 102.7 dB at 20 Hz and 119.2 dB through 40-80 Hz. 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.
Specifications Side By Side
| RBH Sound Unrivaled 21-SF/R | Perlisten Audio R212s | |
|---|---|---|
| Price | $11,995 | $5,000 |
| Ranked | #75 of 109 in Large Home Subwoofers (Over 75 lbs) | #71 of 109 in Large Home Subwoofers (Over 75 lbs) |
| 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 |
| Warranty | - | 5 |
| 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 |
Related Speaker Comparisons
How Perlisten Audio R212s compares with other leading options:
- Monoprice Monolith 16 THX Ultra vs Perlisten Audio R212s
- Perlisten Audio R212s vs Rythmik F18
- Perlisten Audio R212s vs BK Electronics Extreme
- Monoprice Monolith 16 THX Ultra vs RBH Sound Unrivaled 21-SF/R
- Perlisten Audio D215s vs RBH Sound Unrivaled 21-SF/R
Prices on this page were last checked September 29, 2026 at 3:43 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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The Two Speakers In Full
RBH Sound Unrivaled 21-SF/R: $11,995 eBay
Pros: Manufacturer-supplied CEA-2010 data records 112.3 dB at 20 Hz and 118.8 dB through 40-80 Hz, with a passing result down to 10 Hz. The 21” carbon fiber driver and 4,000W thermal power handling gave this sub the first Extreme Bassaholic room rating on record.
Cons: At around 333 lbs, moving or placing this cabinet is a multi-person job, and the price puts it well outside typical home theater budgets.
Full RBH Sound Unrivaled 21-SF/R review and specifications →
| CEA-2010-A Average (40-80Hz) | 118.8 dB |
|---|---|
| Country | United States |
| Dimensions | 27.3”H x 43”W x 21”D (692.2 x 1092.2 x 533.4 mm) |
| Drivers | 21” carbon fiber driver |
| Enclosure | sealed |
| Frequency Response | 12-80Hz, ±3dB |
| Measurement Source | Manufacturer |
| 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 |
| Output SPL at 25 Hz | 117.2 dB |
| Output SPL at 31.5 Hz | 120.1 dB |
| Output SPL at 40 Hz | 119.5 dB |
| Output SPL at 50 Hz | 118.7 dB |
| Output SPL at 63 Hz | 118.4 dB |
| Output SPL at 80 Hz | 118.7 dB |
| Output SPL at 100 Hz | 119.2 dB |
| Power Handling | 4000W thermal power handling |
| Weight | 332.9 lbs (151.0 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- These figures are manufacturer-specified rather than independently measured.
- Head-to-Head Comparisons
Perlisten Audio R212s: $5,000 eBay
Pros: Independent CEA-2010 testing records 102.7 dB at 20 Hz and 119.2 dB through 40-80 Hz. The sealed enclosure with 2x 12” (305mm) drivers delivers substantial upper-bass output for movie effects and music.
Cons: 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. The 599.4H x 408.9W x 500.4D mm cabinet and 48.1 kg mass still require deliberate placement and calibration.
Full Perlisten Audio R212s review and specifications →
| AES Input | No |
|---|---|
| Aux Input | No |
| CEA-2010-A Average (40-80Hz) | 119.2 dB |
| Cabinet Color | black |
| Coaxial Input | No |
| Country | United States |
| Dimensions | 23.6”H x 16.1”W x 19.7”D (599.4 x 408.9 x 500.4 mm) |
| Drivers | 2x 12” (305mm) drivers |
| Enclosure | sealed |
| HDMI Input | No |
| Inputs | RCA (2), XLR (2) |
| Measurement Source | Audioholics |
| Optical Input | No |
| Output SPL at 15 Hz | 98.3 dB |
| Output SPL at 20 Hz | 102.7 dB |
| Output SPL at 25 Hz | 107.7 dB |
| Output SPL at 31.5 Hz | 112.1 dB |
| Output SPL at 40 Hz | 116.0 dB |
| Output SPL at 50 Hz | 118.8 dB |
| Output SPL at 63 Hz | 120.6 dB |
| Output SPL at 80 Hz | 121.4 dB |
| Output SPL at 100 Hz | 121.7 dB |
| Output SPL at 125 Hz | 121.9 dB |
| RCA Input | Yes |
| TRS Input | No |
| USB Input | No |
| Warranty | 5 |
| Weight | 106 lbs (48.1 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Audioholics; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons