Short answer: the Monoprice SW-15. It ranks #13 of 145 subwoofers by sound quality at $374.99; the BK Electronics XLS300/PR ranks #123 and costs $7995, 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 BK Electronics XLS300/PR offers: Very well made, excellent value. Deep extension with controlled, melodic bass. Beautiful black ash finish. Both high- and low-level inputs for flexible integration. Better price than DIY alternatives. Watch for: No detailed measurement caveats are currently recorded.
Buy the Monoprice SW-15. It ranks higher for sound quality than the BK Electronics XLS300/PR and costs less, so there is no real case for the other one.
The BK Electronics XLS300/PR is not a sound-quality pick. It sits near the bottom of the 145 subwoofers; there are better options higher up.
Looking for alternatives? See the complete Subwoofers rankings.
Specifications Side By Side
| Monoprice SW-15 | BK Electronics XLS300/PR | |
|---|---|---|
| Price | $374.99 | $7995 |
| Ranked | #13 of 145 in Medium Home Subwoofers (30-75 lbs) | #123 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 | 92.3 dB |
| Output SPL at 25 Hz | 106.3 dB | 100.3 dB |
| Output SPL at 31.5 Hz | 111.2 dB | 103.1 dB |
| Output SPL at 40 Hz | 116.0 dB | 106.2 dB |
| Output SPL at 50 Hz | 120.2 dB | 107.9 dB |
| Output SPL at 63 Hz | 120.5 dB | 108.7 dB |
| Output SPL at 80 Hz | 119.5 dB | 108.8 dB |
| CEA-2010-A Average (40-80Hz) | 119.0 dB | 107.9 dB |
| Dimensions | 18.1"H x 21"W x 22.7"D (459.7 x 533.4 x 576.6 mm) | 13.8"H x 15.7"W x 15"D (349.8 x 399.8 x 380.0 mm) |
| Weight | 66.1 lbs (30.0 kg) | 55.1 lbs (25.0 kg) |
| Warranty | 1 | 2 |
| Cabinet Color | black | black, wood |
| Country | United States | United Kingdom |
| Measurement Source | Audioholics | Ilkka Rissanen |
| Frequency Response | 30-150Hz (-10dB) | 25Hz+ |
| 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 |
Related Speaker Comparisons
How Monoprice SW-15 compares with other leading options:
- 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
BK Electronics XLS300/PR: $7995 eBay
Pros: Very well made, excellent value. Deep extension with controlled, melodic bass. Beautiful black ash finish. Both high- and low-level inputs for flexible integration. Better price than DIY alternatives.
Full BK Electronics XLS300/PR review and specifications →
| Amplifier Power | 300W RMS |
|---|---|
| CEA-2010-A Average (40-80Hz) | 107.9 dB |
| Cabinet Color | black, wood |
| Country | United Kingdom |
| Dimensions | 13.8"H x 15.7"W x 15"D (349.8 x 399.8 x 380.0 mm) |
| Drivers | 10" (254mm) driver |
| Enclosure | sealed |
| Frequency Response | 25Hz+ |
| Measurement Source | Ilkka Rissanen |
| Output SPL at 20 Hz | 92.3 dB |
| Output SPL at 25 Hz | 100.3 dB |
| Output SPL at 31.5 Hz | 103.1 dB |
| Output SPL at 40 Hz | 106.2 dB |
| Output SPL at 50 Hz | 107.9 dB |
| Output SPL at 63 Hz | 108.7 dB |
| Output SPL at 80 Hz | 108.8 dB |
| Warranty | 2 |
| Weight | 55.1 lbs (25.0 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Ilkka Rissanen; the published figures above come from this ASR subwoofer measurement thread.