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 #16 (rated 4.1/5) for the Power Sound Audio (PSA) XS15.
Why pick the MartinLogan Dynamo 1600X: A sealed 15 inch subwoofer with forceful, tight bass, front or down firing setup, and app based room correction, now discontinued. The catch: Output falls to 86.2dB at 15Hz, so the very lowest effects are weaker than the strong midbass numbers suggest.
What the Power Sound Audio (PSA) XS15 does well: A sealed 15 inch subwoofer with strong output for large rooms and predictable bass that works well with room correction. Watch for: Output drops to 107.1dB in the 20 to 31.5Hz bands, 11dB below the 40Hz range, and the test reports no data for the 80Hz band.
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 strong output for large rooms and predictable bass that works well with room correction.
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Specifications Side By Side
| MartinLogan Dynamo 1600X | Power Sound Audio (PSA) XS15 | |
|---|---|---|
| Price | $1,606.77 Discontinued | $1,299 Discontinued |
| Ranked | #3 of 212 in Medium Home Subwoofers (30-75 lbs) | #16 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 | 107.1 dB |
| Output SPL at 25 Hz | 103.9 dB | 107.1 dB |
| Output SPL at 31.5 Hz | 111.7 dB | 107.1 dB |
| Output SPL at 40 Hz | 118.4 dB | 118.2 dB |
| Output SPL at 50 Hz | 121.0 dB | 118.2 dB |
| Output SPL at 63 Hz | 121.8 dB | 118.2 dB |
| Output SPL at 80 Hz | 121.0 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 | 118.2 dB (avg of 3/4 bands) |
| Dimensions | 20.1”H x 17.9”W x 19.1”D (510.5 x 454.7 x 485.1 mm) | 19.5”H x 17”W x 18”D (495.3 x 431.8 x 457.2 mm) |
| Weight | 56 lbs (25.4 kg) | 59.1 lbs (26.8 kg) |
| Warranty | 3 | 5 |
| Cabinet Color | black | - |
| Country | United States | United States |
| Measurement Source | Audioholics | Manufacturer |
| Frequency Response | 20-200Hz, ±3dB | 23-200Hz, ±3dB |
| Amplifier Power | 900W RMS / 1800W peak | 550W RMS / 1650W peak |
| Inputs | RCA (stereo and LFE), XLR (LFE), speaker-level (banana) | - |
| 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 | - |
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