Short answer: the MartinLogan Dynamo 1600X if sound quality matters most, the SVS 20-39 PC-Plus if price matters most. The MartinLogan Dynamo 1600X ranks #2 of 145 subwoofers at $1606.77. The SVS 20-39 PC-Plus ranks #82 at $1399, $207.77 cheaper.
What the MartinLogan Dynamo 1600X offers: 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. Watch for: Ported design room integration needs, mid-range 121.5 dB output, and $1,607 price.
What the SVS 20-39 PC-Plus offers: 12-inch ported driver delivers 112.3dB CEA-2010-A average from a compact, down-firing cylinder design. Watch for: No detailed measurement caveats are currently recorded.
Buy the MartinLogan Dynamo 1600X when sound quality outweighs the price for you, and the SVS 20-39 PC-Plus when the price outweighs sound quality instead.
Looking for alternatives? See the complete Subwoofers rankings.
Specifications Side By Side
| MartinLogan Dynamo 1600X | SVS 20-39 PC-Plus | |
|---|---|---|
| Price | $1,606.77 | $1399 |
| Ranked | #2 of 145 in Medium Home Subwoofers (30-75 lbs) | #82 of 145 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | sealed | ported, bottom |
| Output SPL at 15 Hz | 86.2 dB | 91.0 dB |
| Output SPL at 20 Hz | 99.4 dB | 102.7 dB |
| Output SPL at 25 Hz | 103.9 dB | 110.3 dB |
| Output SPL at 31.5 Hz | 111.7 dB | 113.0 dB |
| Output SPL at 40 Hz | 118.4 dB | 112.8 dB |
| Output SPL at 50 Hz | 121.0 dB | 113.7 dB |
| Output SPL at 63 Hz | 121.8 dB | 112.0 dB |
| Output SPL at 80 Hz | 121.0 dB | 110.8 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 | 112.3 dB |
| Dimensions | 20.1"H x 17.9"W x 19.1"D (510.5 x 454.7 x 485.1 mm) | 40"H x 16"W x 16"D (1016.0 x 406.4 x 406.4 mm) |
| Weight | 56 lbs (25.4 kg) | 54.9 lbs (24.9 kg) |
| Warranty | 3 | 5 |
| Cabinet Color | black | - |
| Country | United States | United States |
| Measurement Source | Audioholics | Ilkka Rissanen |
| Frequency Response | 20-200Hz, ±3dB | 16-290Hz |
| Amplifier Power | 900W RMS / 1800W peak | 525W RMS |
| Inputs | RCA (stereo and LFE), XLR (LFE), speaker-level (banana) | - |
| Drivers | 15" (381mm) driver | 12" (305mm) driver |
Related Speaker Comparisons
How MartinLogan Dynamo 1600X compares with other leading options:
- JTR Speakers Captivator 212PRO vs MartinLogan Dynamo 1600X
- HSU Research ULS-15 MK2 vs MartinLogan Dynamo 1600X
- MartinLogan Dynamo 1600X vs Monoprice SW-12
- MartinLogan Dynamo 1600X vs Power Sound Audio (PSA) XV15
- MartinLogan Dynamo 1600X vs Paradigm Defiance X12
Prices on this page were last checked September 16, 2026 at 12:41 AM UTC. Product prices and availability are accurate as of that date/time 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.
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The Two Speakers In Full
MartinLogan Dynamo 1600X: $1,606.77 eBay
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.
Full MartinLogan Dynamo 1600X review and specifications →
| Amplifier Power | 900W RMS / 1800W peak |
|---|---|
| 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 |
| Inputs | 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 |
| Warranty | 3 |
| Weight | 56 lbs (25.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Audioholics; the published figures above come from this ASR subwoofer measurement thread.
- 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 Monoprice SW-12
- MartinLogan Dynamo 1600X vs Power Sound Audio (PSA) XV15
- MartinLogan Dynamo 1600X vs Paradigm Defiance X12
- MartinLogan Dynamo 1600X vs Power Sound Audio (PSA) XV15-BASE
- MartinLogan Dynamo 1600X vs Power Sound Audio (PSA) XV15SEICE-BASE
- MartinLogan Dynamo 1600X vs Monoprice SW-15
- See all 48 comparisons
SVS 20-39 PC-Plus: $1399 eBay
Pros: 12-inch ported driver delivers 112.3dB CEA-2010-A average from a compact, down-firing cylinder design.
Notes: “Cylinder” shape
Full SVS 20-39 PC-Plus review and specifications →
| Amplifier Power | 525W RMS |
|---|---|
| CEA-2010-A Average (40-80Hz) | 112.3 dB |
| Country | United States |
| Dimensions | 40"H x 16"W x 16"D (1016.0 x 406.4 x 406.4 mm) |
| Drivers | 12" (305mm) driver |
| Enclosure | ported, bottom |
| Frequency Response | 16-290Hz |
| Measurement Source | Ilkka Rissanen |
| Output SPL at 15 Hz | 91.0 dB |
| Output SPL at 20 Hz | 102.7 dB |
| Output SPL at 25 Hz | 110.3 dB |
| Output SPL at 31.5 Hz | 113.0 dB |
| Output SPL at 40 Hz | 112.8 dB |
| Output SPL at 50 Hz | 113.7 dB |
| Output SPL at 63 Hz | 112.0 dB |
| Output SPL at 80 Hz | 110.8 dB |
| Warranty | 5 |
| Weight | 54.9 lbs (24.9 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Ilkka Rissanen; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons