Short answer: the MartinLogan Dynamo 1600X is for listeners who want the scale of a sealed 15-inch subwoofer, while the Rythmik F12 is the more value-oriented servo-controlled sealed option. The right choice depends on room size and how much output headroom you need.
The Dynamo 1600X uses a 15-inch driver with 900W RMS and 1800W peak power to deliver forceful, tight bass. The F12 uses a sealed 12-inch servo design and 370W amplification, emphasizing control and value in a more modest package.
Buy the MartinLogan Dynamo 1600X for larger-room sealed-subwoofer output and greater amplifier headroom.
Buy the Rythmik F12 for servo-controlled sealed bass and stronger value in a smaller system.
Want more options? Browse the full Subwoofers rankings.
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Specifications Side By Side
| MartinLogan Dynamo 1600X | Rythmik F12 | |
|---|---|---|
| Price | $1,606.77 Discontinued | $1,439 |
| Ranked | #3 of 212 in Medium Home Subwoofers (30-75 lbs) | #21 of 212 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | sealed | sealed |
| Output SPL at 15 Hz | 86.2 dB | - |
| Output SPL at 20 Hz | 99.4 dB | 103.6 dB |
| Output SPL at 25 Hz | 103.9 dB | 106.7 dB |
| Output SPL at 31.5 Hz | 111.7 dB | 113.5 dB |
| Output SPL at 40 Hz | 118.4 dB | 118.3 dB |
| Output SPL at 50 Hz | 121.0 dB | 119.1 dB |
| Output SPL at 63 Hz | 121.8 dB | 120.4 dB |
| Output SPL at 80 Hz | 121.0 dB | 119.6 dB |
| Output SPL at 100 Hz | 120.2 dB | - |
| Output SPL at 125 Hz | 119.0 dB | - |
| CEA-2010-A Average (40-80Hz) | 120.5 dB | 119.3 dB |
| Dimensions | 20.1”H x 17.9”W x 19.1”D (510.5 x 454.7 x 485.1 mm) | 15.7”H x 15.7”W x 17”D (400.0 x 400.0 x 431.8 mm) |
| Weight | 56 lbs (25.4 kg) | 75 lbs (34.0 kg) |
| Warranty | 3 | 5/3 |
| Cabinet Color | black | black |
| Country | United States | United States |
| Measurement Source | Audioholics | Brent Butterworth |
| Frequency Response | 20-200Hz, ±3dB | 14Hz extension |
| Amplifier Power | 900W RMS / 1800W peak | 370W RMS |
| Inputs | RCA (stereo and LFE), XLR (LFE), speaker-level (banana) | XLR (2), RCA (line/LFE) |
| Drivers | 15” (381mm) driver | 12” (305mm) driver |
| XLR Input | Yes | Yes |
| RCA Input | Yes | Yes |
| TRS Input | No | No |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | No | No |
| Output SPL at 16 Hz | - | 101.0 dB |
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