Short answer: the Monoprice SW-15. It ranks #13 of 145 subwoofers by sound quality at $374.99; the SVS 20-39 PC-Plus ranks #82 and costs $1399, 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 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 Monoprice SW-15. It ranks higher for sound quality than the SVS 20-39 PC-Plus and costs less, so there is no real case for the other one.
Still deciding? The full Subwoofers rankings cover every ranked option.
Specifications Side By Side
| Monoprice SW-15 | SVS 20-39 PC-Plus | |
|---|---|---|
| Price | $374.99 | $1399 |
| Ranked | #13 of 145 in Medium Home Subwoofers (30-75 lbs) | #82 of 145 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | ported, bottom | ported, bottom |
| Output SPL at 15 Hz | 90.0 dB | 91.0 dB |
| Output SPL at 20 Hz | 101.2 dB | 102.7 dB |
| Output SPL at 25 Hz | 106.3 dB | 110.3 dB |
| Output SPL at 31.5 Hz | 111.2 dB | 113.0 dB |
| Output SPL at 40 Hz | 116.0 dB | 112.8 dB |
| Output SPL at 50 Hz | 120.2 dB | 113.7 dB |
| Output SPL at 63 Hz | 120.5 dB | 112.0 dB |
| Output SPL at 80 Hz | 119.5 dB | 110.8 dB |
| CEA-2010-A Average (40-80Hz) | 119.0 dB | 112.3 dB |
| Dimensions | 18.1"H x 21"W x 22.7"D (459.7 x 533.4 x 576.6 mm) | 40"H x 16"W x 16"D (1016.0 x 406.4 x 406.4 mm) |
| Weight | 66.1 lbs (30.0 kg) | 54.9 lbs (24.9 kg) |
| Warranty | 1 | 5 |
| Cabinet Color | black | - |
| Country | United States | United States |
| Measurement Source | Audioholics | Ilkka Rissanen |
| Frequency Response | 30-150Hz (-10dB) | 16-290Hz |
| Amplifier Power | 600W RMS / 800W peak | 525W RMS |
| Crossover Frequency | 40-150Hz, 18dB/octave | - |
| Phase Control | 0° or 180° | - |
| Inputs | Stereo line level and speaker level | - |
| Drivers | 15" (381mm) driver | 12" (305mm) driver |
Related Speaker Comparisons
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- Monoprice SW-15 vs PSB Speakers SubSeries 450
- Monoprice SW-12 vs Monoprice SW-15
Prices on this page were last checked September 14, 2026 at 1:47 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
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- 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 72 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