Short answer: the Dynamo 1600X for clean output, the Monoprice SW-15 for large-room bass. The sealed Dynamo’s 900W RMS and 1800W peak deliver forceful, clean, tight low bass, though it costs $1,606.77 and its 121.5 dB mid-range output is a caveat. The 15-inch ported SW-15 runs 600W RMS and 800W peak with a Large-room Bassaholic rating, at 66.1 lbs (30 kg) and with limited dynamic headroom.
Buy the Monoprice SW-15 if you want one new; the MartinLogan Dynamo 1600X is discontinued, so only look for it used.
Looking for alternatives? See the complete Subwoofers rankings.
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Specifications Side By Side
| MartinLogan Dynamo 1600X | Monoprice SW-15 | |
|---|---|---|
| Price | $1,606.77 Discontinued | $499.99 |
| Ranked | #3 of 212 in Medium Home Subwoofers (30-75 lbs) | #14 of 212 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | sealed | ported, bottom |
| Output SPL at 15 Hz | 86.2 dB | 90.0 dB |
| Output SPL at 20 Hz | 99.4 dB | 101.2 dB |
| Output SPL at 25 Hz | 103.9 dB | 106.3 dB |
| Output SPL at 31.5 Hz | 111.7 dB | 111.2 dB |
| Output SPL at 40 Hz | 118.4 dB | 116.0 dB |
| Output SPL at 50 Hz | 121.0 dB | 120.2 dB |
| Output SPL at 63 Hz | 121.8 dB | 120.5 dB |
| Output SPL at 80 Hz | 121.0 dB | 119.5 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 | 119.0 dB |
| Dimensions | 20.1”H x 17.9”W x 19.1”D (510.5 x 454.7 x 485.1 mm) | 18.1”H x 21”W x 22.7”D (459.7 x 533.4 x 576.6 mm) |
| Weight | 56 lbs (25.4 kg) | 66.1 lbs (30.0 kg) |
| Warranty | 3 | 1 |
| Cabinet Color | black | black |
| Country | United States | United States |
| Measurement Source | Audioholics | Audioholics |
| Frequency Response | 20-200Hz, ±3dB | 30-150Hz (-10dB) |
| Amplifier Power | 900W RMS / 1800W peak | 600W RMS / 800W peak |
| Inputs | RCA (stereo and LFE), XLR (LFE), speaker-level (banana) | Stereo line level and speaker level |
| Drivers | 15” (381mm) driver | 15” (381mm) driver |
| 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 | - |
| Crossover Frequency | - | 40-150Hz, 18dB/octave |
| Phase Control | - | 0° or 180° |
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