Short answer: both are discontinued, and they are rated the same for sound quality (#3 and #68 of 212 subwoofers). Either one is only an option used, so choose on condition and price.
Buy the MartinLogan Dynamo 1600X or the Monoprice Monolith M-212, whichever you find used in better condition; both are discontinued.
Want more options? Browse the full Subwoofers rankings.
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Specifications Side By Side
| MartinLogan Dynamo 1600X | Monoprice Monolith M-212 | |
|---|---|---|
| Price | $1,606.77 Discontinued | $1,620 Discontinued |
| Ranked | #3 of 212 in Medium Home Subwoofers (30-75 lbs) | #68 of 143 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | sealed | ported, front |
| Output SPL at 15 Hz | 86.2 dB | 104.2 dB |
| Output SPL at 20 Hz | 99.4 dB | 110.3 dB |
| Output SPL at 25 Hz | 103.9 dB | 114.5 dB |
| Output SPL at 31.5 Hz | 111.7 dB | 116.9 dB |
| Output SPL at 40 Hz | 118.4 dB | 119.7 dB |
| Output SPL at 50 Hz | 121.0 dB | 119.8 dB |
| Output SPL at 63 Hz | 121.8 dB | 120.3 dB |
| Output SPL at 80 Hz | 121.0 dB | 121.7 dB |
| Output SPL at 100 Hz | 120.2 dB | 121.5 dB |
| Output SPL at 125 Hz | 119.0 dB | 122.3 dB |
| CEA-2010-A Average (40-80Hz) | 120.5 dB | 120.4 dB |
| Dimensions | 20.1”H x 17.9”W x 19.1”D (510.5 x 454.7 x 485.1 mm) | 36.4”H x 17.7”W x 23.6”D (924.6 x 449.6 x 599.4 mm) |
| Weight | 56 lbs (25.4 kg) | 174.2 lbs (79.0 kg) |
| Warranty | 3 | 5 |
| Cabinet Color | black | black |
| Country | United States | United States |
| Measurement Source | Audioholics | Manufacturer |
| Frequency Response | 20-200Hz, ±3dB | - |
| Amplifier Power | 900W RMS / 1800W peak | - |
| Inputs | RCA (stereo and LFE), XLR (LFE), speaker-level (banana) | - |
| Drivers | 15” (381mm) driver | 2x 12” (305mm) drivers |
| 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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