Short answer: the Klipsch R-121SW, if you are buying new. The Onkyo SKW-204 ranks higher than it (#3 vs #132 of 212 subwoofers, 3.8/5 vs 3.6/5) but is discontinued, so only consider it used; the Klipsch R-121SW is still sold new at $389.99.
Buy the Klipsch R-121SW new; the Onkyo SKW-204 is no longer sold new, so it only makes sense as a used find.
Still deciding? The full Subwoofers rankings cover every ranked option.
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Specifications Side By Side
| Klipsch R-121SW | Onkyo SKW-204 | |
|---|---|---|
| Price | $389.99 | $299 Discontinued |
| Ranked | #132 of 212 in Medium Home Subwoofers (30-75 lbs) | #3 of 73 in Small Home Subwoofers (Under 30 lbs) |
| Enclosure | ported, rear | ported, front |
| Output SPL at 15 Hz | 90.7 dB | - |
| Output SPL at 20 Hz | 96.0 dB | 77.3 dB |
| Output SPL at 25 Hz | 98.4 dB | 90.1 dB |
| Output SPL at 31.5 Hz | 102.3 dB | 103.3 dB |
| Output SPL at 40 Hz | 108.2 dB | 108.7 dB |
| Output SPL at 50 Hz | 112.4 dB | 114.0 dB |
| Output SPL at 63 Hz | 112.9 dB | 119.6 dB |
| Output SPL at 80 Hz | 111.3 dB | 121.4 dB |
| Output SPL at 100 Hz | 109.9 dB | - |
| Output SPL at 125 Hz | 108.3 dB | - |
| CEA-2010-A Average (40-80Hz) | 111.2 dB | 115.9 dB |
| Dimensions | 16.6”H x 16”W x 19.7”D (421.6 x 406.4 x 500.4 mm) | 18.6”H x 10.8”W x 16.9”D (472.9 x 274.6 x 428.5 mm) |
| Weight | 35.1 lbs (15.9 kg) | 26 lbs (11.8 kg) |
| Warranty | 5/2 | 1 |
| Cabinet Color | black | black |
| Country | United States | Japan |
| Measurement Source | Audioholics | Brent Butterworth |
| Amplifier Power | 200W RMS | - |
| Frequency Response | 28-120Hz | - |
| Drivers | 12” (305mm) driver | 10” (254mm) driver |
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