Short answer: the Monoprice SW-15. It ranks #13 of 145 subwoofers by sound quality at $374.99; the MartinLogan Dynamo 600X ranks #119 and costs $547.76, so there is not much of a tradeoff to weigh.
What the Monoprice SW-15 offers: 15-inch ported with 600W RMS (800W peak) delivers Large-room Bassaholic rating. Unrivaled mid-bass punch for $375. Strong output with clean control. Dual speaker-level inputs and 40-150Hz crossover for flexible hookup. Watch for: Budget-tier design, ported room gain dependency, 30 kg mid-size, and limited dynamic headroom.
What the MartinLogan Dynamo 600X offers: 10-inch ported with 120W RMS plays tight controlled deep bass. Anthem Room Correction (ARC) included. Smartphone app control with Bluetooth connectivity. Great musicality and blends beautifully with small speakers. Watch for: No detailed measurement caveats are currently recorded.
Buy the Monoprice SW-15. It ranks higher for sound quality than the MartinLogan Dynamo 600X and costs less, so there is no real case for the other one.
The MartinLogan Dynamo 600X is not a sound-quality pick. It sits near the bottom of the 145 subwoofers; there are better options higher up.
Want more options? Browse the full Subwoofers rankings.
Specifications Side By Side
| Monoprice SW-15 | MartinLogan Dynamo 600X | |
|---|---|---|
| Price | $374.99 | $547.76 |
| Ranked | #13 of 145 in Medium Home Subwoofers (30-75 lbs) | #119 of 145 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | ported, bottom | ported, bottom |
| Output SPL at 15 Hz | 90.0 dB | - |
| Output SPL at 20 Hz | 101.2 dB | 95.7 dB |
| Output SPL at 25 Hz | 106.3 dB | 100.9 dB |
| Output SPL at 31.5 Hz | 111.2 dB | 103.6 dB |
| Output SPL at 40 Hz | 116.0 dB | 106.8 dB |
| Output SPL at 50 Hz | 120.2 dB | 109.3 dB |
| Output SPL at 63 Hz | 120.5 dB | 110.3 dB |
| Output SPL at 80 Hz | 119.5 dB | 109.3 dB |
| CEA-2010-A Average (40-80Hz) | 119.0 dB | 108.9 dB |
| Dimensions | 18.1"H x 21"W x 22.7"D (459.7 x 533.4 x 576.6 mm) | 16.3"H x 14.5"W x 14.9"D (414.0 x 368.3 x 378.5 mm) |
| Weight | 66.1 lbs (30.0 kg) | 35.5 lbs (16.1 kg) |
| Warranty | 1 | 3 |
| Cabinet Color | black | black |
| Country | United States | United States |
| Measurement Source | Audioholics | Audioholics |
| Frequency Response | 30-150Hz (-10dB) | 27-200Hz |
| Amplifier Power | 600W RMS / 800W peak | 120W RMS |
| Crossover Frequency | 40-150Hz, 18dB/octave | - |
| Phase Control | 0° or 180° | - |
| Inputs | Stereo line level and speaker level | - |
| Drivers | 15" (381mm) driver | 10" (254mm) driver |
| Output SPL at 100 Hz | - | 108.1 dB |
| Output SPL at 125 Hz | - | 106.9 dB |
Related Speaker Comparisons
More top alternatives to Monoprice SW-15:
- JTR Speakers Captivator 212PRO vs Monoprice SW-15
- MartinLogan Dynamo 1600X vs Monoprice SW-15
- HSU Research ULS-15 MK2 vs Monoprice SW-15
- Monoprice SW-15 vs PSB Speakers SubSeries 450
- Monoprice SW-12 vs Monoprice SW-15
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
Monoprice SW-15: $374.99 Amazon eBay
Pros: 15-inch ported with 600W RMS (800W peak) delivers Large-room Bassaholic rating. Unrivaled mid-bass punch for $375. Strong output with clean control. Dual speaker-level inputs and 40-150Hz crossover for flexible hookup.
Cons: Budget-tier design, ported room gain dependency, 30 kg mid-size, and limited dynamic headroom.
Notes: Product # 41499
Full Monoprice SW-15 review and specifications →
| Amplifier Power | 600W RMS / 800W peak |
|---|---|
| CEA-2010-A Average (40-80Hz) | 119.0 dB |
| Cabinet Color | black |
| Country | United States |
| Crossover Frequency | 40-150Hz, 18dB/octave |
| Dimensions | 18.1"H x 21"W x 22.7"D (459.7 x 533.4 x 576.6 mm) |
| Drivers | 15" (381mm) driver |
| Enclosure | ported, bottom |
| Frequency Response | 30-150Hz (-10dB) |
| Inputs | Stereo line level and speaker level |
| Measurement Source | Audioholics |
| Output SPL at 15 Hz | 90.0 dB |
| Output SPL at 20 Hz | 101.2 dB |
| Output SPL at 25 Hz | 106.3 dB |
| Output SPL at 31.5 Hz | 111.2 dB |
| Output SPL at 40 Hz | 116.0 dB |
| Output SPL at 50 Hz | 120.2 dB |
| Output SPL at 63 Hz | 120.5 dB |
| Output SPL at 80 Hz | 119.5 dB |
| Phase Control | 0° or 180° |
| Warranty | 1 |
| Weight | 66.1 lbs (30.0 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
- Monoprice SW-15 vs Power Sound Audio (PSA) XV15SEICE-BASE
- Monoprice SW-15 vs SVS SB-3000
- Monoprice SW-15 vs Power Sound Audio (PSA) XS15
- Monoprice SW-15 vs Power Sound Audio (PSA) XV15-BASE
- Monoprice SW-15 vs Paradigm Defiance X12
- Monoprice SW-15 vs Power Sound Audio (PSA) XS15-BASE
- Monoprice SW-15 vs Power Sound Audio (PSA) XV15
- Monoprice SW-15 vs Klipsch SPL-120
- See all 109 comparisons
MartinLogan Dynamo 600X: $547.76 eBay
Pros: 10-inch ported with 120W RMS plays tight controlled deep bass. Anthem Room Correction (ARC) included. Smartphone app control with Bluetooth connectivity. Great musicality and blends beautifully with small speakers.
Full MartinLogan Dynamo 600X review and specifications →
| Amplifier Power | 120W RMS |
|---|---|
| CEA-2010-A Average (40-80Hz) | 108.9 dB |
| Cabinet Color | black |
| Country | United States |
| Dimensions | 16.3"H x 14.5"W x 14.9"D (414.0 x 368.3 x 378.5 mm) |
| Drivers | 10" (254mm) driver |
| Enclosure | ported, bottom |
| Frequency Response | 27-200Hz |
| Measurement Source | Audioholics |
| Output SPL at 20 Hz | 95.7 dB |
| Output SPL at 25 Hz | 100.9 dB |
| Output SPL at 31.5 Hz | 103.6 dB |
| Output SPL at 40 Hz | 106.8 dB |
| Output SPL at 50 Hz | 109.3 dB |
| Output SPL at 63 Hz | 110.3 dB |
| Output SPL at 80 Hz | 109.3 dB |
| Output SPL at 100 Hz | 108.1 dB |
| Output SPL at 125 Hz | 106.9 dB |
| Warranty | 3 |
| Weight | 35.5 lbs (16.1 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Audioholics; the published figures above come from this ASR subwoofer measurement thread.