Short answer: both are discontinued, so this only matters if you are buying used. Used, the MartinLogan Dynamo 1600X is the better pick: it ranks #3 of 212 subwoofers by sound quality (rated 4.2/5), against #38 (rated 3.9/5) for the MartinLogan Dynamo 1500X.
The MartinLogan Dynamo 1600X is the better-sounding pick. A sealed 15 inch subwoofer with forceful, tight bass, front or down firing setup, and app based room correction, now discontinued. Watch for: Output falls to 86.2dB at 15Hz, so the very lowest effects are weaker than the strong midbass numbers suggest.
What the MartinLogan Dynamo 1500X does well: A sealed 15 inch subwoofer with forceful, clean low bass that can fire forward or down, with room correction for several seats. Watch for: Output drops to 100.4dB at 20Hz and 92.9dB at 12.5Hz, which is typical of a sealed design and leaves less room for the deepest effects than a ported 15 inch.
Buy the MartinLogan Dynamo 1600X only if you find one used in good condition; both are discontinued, and it is the better rated of the two.
Still deciding? The full Subwoofers rankings cover every ranked option.
A sealed 15 inch subwoofer with forceful, tight bass, front or down firing setup, and app based room correction, now discontinued.
A sealed 15 inch subwoofer with forceful, clean low bass that can fire forward or down, with room correction for several seats.
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Specifications Side By Side
| MartinLogan Dynamo 1600X | MartinLogan Dynamo 1500X | |
|---|---|---|
| Price | $1,606.77 Discontinued | $1,299 Discontinued |
| Ranked | #3 of 212 in Medium Home Subwoofers (30-75 lbs) | #38 of 212 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | sealed | sealed |
| Output SPL at 15 Hz | 86.2 dB | 95.6 dB |
| Output SPL at 20 Hz | 99.4 dB | 100.4 dB |
| Output SPL at 25 Hz | 103.9 dB | 104.4 dB |
| Output SPL at 31.5 Hz | 111.7 dB | 108.3 dB |
| Output SPL at 40 Hz | 118.4 dB | 113.0 dB |
| Output SPL at 50 Hz | 121.0 dB | 117.1 dB |
| Output SPL at 63 Hz | 121.8 dB | 118.3 dB |
| Output SPL at 80 Hz | 121.0 dB | 117.4 dB |
| Output SPL at 100 Hz | 120.2 dB | 116.2 dB |
| Output SPL at 125 Hz | 119.0 dB | 115.1 dB |
| CEA-2010-A Average (40-80Hz) | 120.5 dB | 116.5 dB |
| Dimensions | 20.1”H x 17.9”W x 19.1”D (510.5 x 454.7 x 485.1 mm) | 18.3”H x 16.7”W x 17.6”D (464.8 x 425.4 x 447.0 mm) |
| Weight | 56 lbs (25.4 kg) | 52 lbs (23.6 kg) |
| Warranty | 3 | 3 |
| Cabinet Color | black | - |
| Country | United States | United States |
| Measurement Source | Audioholics | Audioholics |
| Frequency Response | 20-200Hz, ±3dB | 20Hz+ (with room correction) |
| Amplifier Power | 900W RMS / 1800W peak | 650W RMS / 1300W peak |
| Inputs | RCA (stereo and LFE), XLR (LFE), speaker-level (banana) | XLR (LFE), RCA (LFE), RCA (stereo), speaker-level |
| Drivers | 15” (381mm) driver | 15” (381mm) 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 12.5 Hz | - | 92.9 dB |
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