Short answer: the Monoprice SW-15. It ranks #13 of 145 subwoofers by sound quality at $374.99; the JBL SUB 550P ranks #141 and costs $600, so there is little reason to consider the other one.
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 JBL SUB 550P offers: 10-inch sealed with 300W RMS delivers low distortion realistic bass compared to cheaper options. Deep bass response similar to larger 12” models. Multiple line-level inputs and adjustable crossover control. Watch for: No detailed measurement caveats are currently recorded.
Buy the Monoprice SW-15. It ranks higher for sound quality than the JBL SUB 550P and costs less, so there is no real case for the other one.
Skip the JBL SUB 550P if sound quality matters to you. It ranks near the bottom of the 145 subwoofers.
Still deciding? The full Subwoofers rankings cover every ranked option.
Specifications Side By Side
| Monoprice SW-15 | JBL SUB 550P | |
|---|---|---|
| Price | $374.99 | $600 |
| Ranked | #13 of 145 in Medium Home Subwoofers (30-75 lbs) | #141 of 145 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | ported, bottom | sealed |
| Output SPL at 15 Hz | 90.0 dB | - |
| Output SPL at 20 Hz | 101.2 dB | 84.7 dB |
| Output SPL at 25 Hz | 106.3 dB | 89.8 dB |
| Output SPL at 31.5 Hz | 111.2 dB | 98.1 dB |
| Output SPL at 40 Hz | 116.0 dB | 101.5 dB |
| Output SPL at 50 Hz | 120.2 dB | 103.2 dB |
| Output SPL at 63 Hz | 120.5 dB | 103.3 dB |
| Output SPL at 80 Hz | 119.5 dB | 103.7 dB |
| CEA-2010-A Average (40-80Hz) | 119.0 dB | 102.9 dB |
| Dimensions | 18.1"H x 21"W x 22.7"D (459.7 x 533.4 x 576.6 mm) | 17.5"H x 14.9"W x 15"D (444 x 379 x 380 mm) |
| Weight | 66.1 lbs (30.0 kg) | 50 lbs (22.7 kg) |
| Warranty | 1 | 1 |
| Cabinet Color | black | black |
| Country | United States | United States |
| Measurement Source | Audioholics | ErinsAudioCorner |
| Frequency Response | 30-150Hz (-10dB) | 27-150Hz |
| Amplifier Power | 600W RMS / 800W peak | 300W 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 | - | 104.2 dB |
Related Speaker Comparisons
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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 Paradigm Defiance X12
- Monoprice SW-15 vs Power Sound Audio (PSA) XS15-BASE
- Monoprice SW-15 vs Power Sound Audio (PSA) XV15
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JBL SUB 550P: $600 eBay
Pros: 10-inch sealed with 300W RMS delivers low distortion realistic bass compared to cheaper options. Deep bass response similar to larger 12” models. Multiple line-level inputs and adjustable crossover control.
Full JBL SUB 550P review and specifications →
| Amplifier Power | 300W RMS |
|---|---|
| CEA-2010-A Average (40-80Hz) | 102.9 dB |
| Cabinet Color | black |
| Country | United States |
| Dimensions | 17.5"H x 14.9"W x 15"D (444 x 379 x 380 mm) |
| Drivers | 10" (254mm) driver |
| Enclosure | sealed |
| Frequency Response | 27-150Hz |
| Measurement Source | ErinsAudioCorner |
| Output SPL at 20 Hz | 84.7 dB |
| Output SPL at 25 Hz | 89.8 dB |
| Output SPL at 31.5 Hz | 98.1 dB |
| Output SPL at 40 Hz | 101.5 dB |
| Output SPL at 50 Hz | 103.2 dB |
| Output SPL at 63 Hz | 103.3 dB |
| Output SPL at 80 Hz | 103.7 dB |
| Output SPL at 100 Hz | 104.2 dB |
| Warranty | 1 |
| Weight | 50 lbs (22.7 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by ErinsAudioCorner; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons