Short answer: the MartinLogan Dynamo 1600X ranks #2 of 137 subwoofers at $1606.77; the Paradigm Defiance X15 ranks #29 at $1606.77. Close enough in price that the ranking gap is the deciding factor.
The case for the MartinLogan Dynamo 1600X: Sealed 15-inch with 900W RMS, 1800W peak delivers forceful clean tight low bass. Set against that: Ported design room integration needs, mid-range 121.5 dB output, and $1,607 price.
Buy the MartinLogan Dynamo 1600X if the ranking matters more than the price. Buy the Paradigm Defiance X15 if the price matters more than the ranking.
Specifications Side By Side
| MartinLogan Dynamo 1600X | Paradigm Defiance X15 | |
|---|---|---|
| Price | $1,606.77 | $1,606.77 |
| Ranked | #2 of 137 in Medium Powered Home Subwoofers (30-75 lbs) | #29 of 97 in Large Powered Home Subwoofers (Over 75 lbs) |
| Enclosure | sealed | ported, bottom |
| Output SPL at 15 Hz | 86.2 dB | 102.8 dB |
| Output SPL at 20 Hz | 99.4 dB | 109.2 dB |
| Output SPL at 25 Hz | 103.9 dB | 112.2 dB |
| Output SPL at 31.5 Hz | 111.7 dB | 116.2 dB |
| Output SPL at 40 Hz | 118.4 dB | 121.3 dB |
| Output SPL at 50 Hz | 121.0 dB | 123.4 dB |
| Output SPL at 63 Hz | 121.8 dB | 123.8 dB |
| Output SPL at 80 Hz | 121.0 dB | 123.1 dB |
| Output SPL at 100 Hz | 120.2 dB | 121.9 dB |
| Output SPL at 125 Hz | 119.0 dB | 121.2 dB |
| CEA-2010-A Average (40-80Hz) | 120.5 dB | 122.9 dB |
| Dimensions | 20.1"H x 17.9"W x 19.1"D (510.5 x 454.7 x 485.1 mm) | 24.62"H x 23.18"W x 24.62"D (625.3 x 588.8 x 625.3 mm) |
| Weight | 56 lbs / 25.4 kg | 91.9 lbs / 41.7 kg |
| Warranty | 3 | 3 |
| Cabinet Color | black | black |
| Country | United States | Canada |
| Measurement Source | Audioholics | Audioholics |
| Frequency Response | 20-200Hz, ±3dB | - |
| Power Output (Watts) | 900W RMS / 1800W peak | - |
| Input Connections | RCA (stereo and LFE), XLR (LFE), speaker-level (banana) | - |
| Drivers | 15" (381mm) driver | 15" (381mm) driver |
The Two Speakers In Full
MartinLogan Dynamo 1600X: $1,606.77
Pros: Sealed 15-inch with 900W RMS, 1800W peak delivers forceful clean tight low bass. Easily configurable as forward-firing or down-firing. Smartphone app with Anthem Room Correction (ARC) optimizes bass across room. Wireless capable with optional SWT-X module.
Cons: Ported design room integration needs, mid-range 121.5 dB output, and $1,607 price.
| CEA-2010-A Average (40-80Hz) | 120.5 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 20.1"H x 17.9"W x 19.1"D (510.5 x 454.7 x 485.1 mm) |
| Drivers | 15" (381mm) driver |
| Enclosure | sealed |
| Frequency Response | 20-200Hz, ±3dB |
| Input Connections | RCA (stereo and LFE), XLR (LFE), speaker-level (banana) |
| Measurement Source | Audioholics |
| Output SPL at 15 Hz | 86.2 dB |
| Output SPL at 20 Hz | 99.4 dB |
| Output SPL at 25 Hz | 103.9 dB |
| Output SPL at 31.5 Hz | 111.7 dB |
| Output SPL at 40 Hz | 118.4 dB |
| Output SPL at 50 Hz | 121.0 dB |
| Output SPL at 63 Hz | 121.8 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 |
| Power Output (Watts) | 900W RMS / 1800W peak |
| Warranty | 3 |
| Weight | 56 lbs / 25.4 kg |
- Head-to-Head Comparisons
- MartinLogan Dynamo 1600X vs HSU Research ULS-15 MK2
- MartinLogan Dynamo 1600X vs JTR Speakers Captivator 212PRO
- MartinLogan Dynamo 1600X vs Power Sound Audio (PSA) XV15
- MartinLogan Dynamo 1600X vs Monoprice SW-15
- MartinLogan Dynamo 1600X vs SVS SB-3000
- MartinLogan Dynamo 1600X vs SVS PB-1000 PRO
- MartinLogan Dynamo 1600X vs Monoprice SW-12
- MartinLogan Dynamo 1600X vs Rythmik F12
- See all 15 comparisons
- Links
Paradigm Defiance X15: $1,606.77
| CEA-2010-A Average (40-80Hz) | 122.9 dB |
|---|---|
| Cabinet Color | black |
| Country | Canada |
| Dimensions | 24.62"H x 23.18"W x 24.62"D (625.3 x 588.8 x 625.3 mm) |
| Drivers | 15" (381mm) driver |
| Enclosure | ported, bottom |
| Measurement Source | Audioholics |
| Output SPL at 15 Hz | 102.8 dB |
| Output SPL at 20 Hz | 109.2 dB |
| Output SPL at 25 Hz | 112.2 dB |
| Output SPL at 31.5 Hz | 116.2 dB |
| Output SPL at 40 Hz | 121.3 dB |
| Output SPL at 50 Hz | 123.4 dB |
| Output SPL at 63 Hz | 123.8 dB |
| Output SPL at 80 Hz | 123.1 dB |
| Output SPL at 100 Hz | 121.9 dB |
| Output SPL at 125 Hz | 121.2 dB |
| Warranty | 3 |
| Weight | 91.9 lbs / 41.7 kg |
- Links
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Product prices and availability were last checked August 9, 2026 at 6:57 AM UTC and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.