Short answer: the MartinLogan Dynamo 1600X for output, the Klipsch R-121SW for value. The Dynamo 1600X ranks #3 of 212 medium subwoofers at $1,606.77 and its sealed 15-inch driver with 900W RMS and 1800W peak delivers forceful, clean, tight low bass, though the notes flag its room integration needs. The R-121SW costs $389.99, and its 12-inch spun-copper driver with 200W RMS gives controlled, musical bass with minimal distortion.
Buy the Klipsch R-121SW, since the MartinLogan Dynamo 1600X is discontinued and only worth hunting down used.
Looking for alternatives? See the complete Subwoofers rankings.
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Specifications Side By Side
| Klipsch R-121SW | MartinLogan Dynamo 1600X | |
|---|---|---|
| Price | $389.99 | $1,606.77 Discontinued |
| Ranked | #132 of 212 in Medium Home Subwoofers (30-75 lbs) | #3 of 212 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | ported, rear | sealed |
| Output SPL at 15 Hz | 90.7 dB | 86.2 dB |
| Output SPL at 20 Hz | 96.0 dB | 99.4 dB |
| Output SPL at 25 Hz | 98.4 dB | 103.9 dB |
| Output SPL at 31.5 Hz | 102.3 dB | 111.7 dB |
| Output SPL at 40 Hz | 108.2 dB | 118.4 dB |
| Output SPL at 50 Hz | 112.4 dB | 121.0 dB |
| Output SPL at 63 Hz | 112.9 dB | 121.8 dB |
| Output SPL at 80 Hz | 111.3 dB | 121.0 dB |
| Output SPL at 100 Hz | 109.9 dB | 120.2 dB |
| Output SPL at 125 Hz | 108.3 dB | 119.0 dB |
| CEA-2010-A Average (40-80Hz) | 111.2 dB | 120.5 dB |
| Dimensions | 16.6”H x 16”W x 19.7”D (421.6 x 406.4 x 500.4 mm) | 20.1”H x 17.9”W x 19.1”D (510.5 x 454.7 x 485.1 mm) |
| Weight | 35.1 lbs (15.9 kg) | 56 lbs (25.4 kg) |
| Warranty | 5/2 | 3 |
| Cabinet Color | black | black |
| Country | United States | United States |
| Measurement Source | Audioholics | Audioholics |
| Amplifier Power | 200W RMS | 900W RMS / 1800W peak |
| Frequency Response | 28-120Hz | 20-200Hz, ±3dB |
| Drivers | 12” (305mm) driver | 15” (381mm) driver |
| Inputs | - | RCA (stereo and LFE), XLR (LFE), speaker-level (banana) |
| 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 |
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