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 #32 (rated 3.9/5) for the JBL HDI-1200P. If you want one new, the JTR Speakers Captivator 212PRO ranks #1 at $2,799.
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.
Why pick the JBL HDI-1200P: A compact 12 inch subwoofer with a powerful amp, low distortion and adjustable crossover and phase for easy blending, now discontinued. The tradeoff: Output drops quickly below the port tuning, to 93.2dB at 25Hz against 109.5dB at 31.5Hz, so the deepest effects are limited.
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. For a new speaker, start with the JTR Speakers Captivator 212PRO instead.
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 compact 12 inch subwoofer with a powerful amp, low distortion and adjustable crossover and phase for easy blending, now discontinued.
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Specifications Side By Side
| MartinLogan Dynamo 1600X | JBL HDI-1200P | |
|---|---|---|
| Price | $1,606.77 Discontinued | $2,310 Discontinued |
| Ranked | #3 of 212 in Medium Home Subwoofers (30-75 lbs) | #32 of 212 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | sealed | ported, bottom |
| Output SPL at 15 Hz | 86.2 dB | - |
| Output SPL at 20 Hz | 99.4 dB | - |
| Output SPL at 25 Hz | 103.9 dB | 93.2 dB |
| Output SPL at 31.5 Hz | 111.7 dB | 109.5 dB |
| Output SPL at 40 Hz | 118.4 dB | 115.6 dB |
| Output SPL at 50 Hz | 121.0 dB | 119.1 dB |
| Output SPL at 63 Hz | 121.8 dB | 119.0 dB |
| Output SPL at 80 Hz | 121.0 dB | 114.9 dB |
| Output SPL at 100 Hz | 120.2 dB | 115.4 dB |
| Output SPL at 125 Hz | 119.0 dB | 117.2 dB |
| CEA-2010-A Average (40-80Hz) | 120.5 dB | 117.2 dB |
| Dimensions | 20.1”H x 17.9”W x 19.1”D (510.5 x 454.7 x 485.1 mm) | 16.9”H x 16.3”W x 17.8”D (430.5 x 414.0 x 451.4 mm) |
| Weight | 56 lbs (25.4 kg) | 70.8 lbs (32.1 kg) |
| Warranty | 3 | 5 |
| Cabinet Color | black | black, wood |
| Country | United States | United States |
| Measurement Source | Audioholics | Audioholics |
| Frequency Response | 20-200Hz, ±3dB | 28-150Hz (-6dB) |
| Amplifier Power | 900W RMS / 1800W peak | 1000W RMS |
| Inputs | RCA (stereo and LFE), XLR (LFE), speaker-level (banana) | RCA (unbalanced) and XLR (balanced) |
| 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 |
| Crossover Frequency | - | 50-150Hz, 24dB/octave |
| Features | - | Single-band parametric EQ |
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