Short answer: the Monoprice SW-15. It ranks #14 of 212 subwoofers by sound quality, rated 4.1/5, at $499.99. The WiiM Sub Pro ranks #116, rated 3.6/5, at $479, $20.99 cheaper, which does not close the gap in sound quality.
The Monoprice SW-15 is the better-sounding pick. A big 15 inch subwoofer with powerful, punchy bass at a budget price, great for movies in a large room. The catch: Budget-tier design, ported room gain dependency, 66.1 lbs (30 kg) mid-size, and limited dynamic headroom.
What the WiiM Sub Pro does well: A compact 8 inch ported subwoofer from WiiM, sized for small to medium rooms. Watch for: The 398.8H x 299.7W x 322.6D mm cabinet and 35.3 lbs (16.0 kg) mass still need deliberate placement.
Buy the Monoprice SW-15. It is rated higher for sound quality, and the $20.99 you would save on the WiiM Sub Pro does not close the gap.
Looking for alternatives? See the complete Subwoofers rankings.
A big 15 inch subwoofer with powerful, punchy bass at a budget price, great for movies in a large room.
A compact 8 inch ported subwoofer from WiiM, sized for small to medium rooms.
Prices on this page were last checked October 31, 2026 at 7:11 PM 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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Specifications Side By Side
| Monoprice SW-15 | WiiM Sub Pro | |
|---|---|---|
| Price | $499.99 | $479.00 |
| Ranked | #14 of 212 in Medium Home Subwoofers (30-75 lbs) | #116 of 212 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | ported, bottom | ported |
| Output SPL at 15 Hz | 90.0 dB | - |
| Output SPL at 20 Hz | 101.2 dB | 77.4 dB |
| Output SPL at 25 Hz | 106.3 dB | 92.9 dB |
| Output SPL at 31.5 Hz | 111.2 dB | 102.0 dB |
| Output SPL at 40 Hz | 116.0 dB | 109.5 dB |
| Output SPL at 50 Hz | 120.2 dB | 111.7 dB |
| Output SPL at 63 Hz | 120.5 dB | 113.6 dB |
| Output SPL at 80 Hz | 119.5 dB | 112.6 dB |
| CEA-2010-A Average (40-80Hz) | 119.0 dB | 111.8 dB |
| Dimensions | 18.1”H x 21”W x 22.7”D (459.7 x 533.4 x 576.6 mm) | 15.7”H x 11.8”W x 12.7”D (398.8 x 299.7 x 322.6 mm) |
| Weight | 66.1 lbs (30.0 kg) | 35.3 lbs (16.0 kg) |
| Warranty | 1 | 1 |
| Cabinet Color | black | - |
| Country | United States | China |
| Measurement Source | Audioholics | Brent Butterworth |
| Frequency Response | 30-150Hz (-10dB) | - |
| Amplifier Power | 600W RMS / 800W peak | - |
| Crossover Frequency | 40-150Hz, 18dB/octave | - |
| Phase Control | 0° or 180° | - |
| Inputs | Stereo line level and speaker level | - |
| Drivers | 15” (381mm) driver | 8” (203mm) driver |
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