Short answer: the Monoprice SW-15, if you are buying new. The Polk Audio DSW PRO 660 measures as well as it (#20 vs #14 of 212 subwoofers, 4.1/5 vs 4.1/5) but is discontinued, so only consider it used; the Monoprice SW-15 is still sold new at $499.99.
What the Monoprice SW-15 does well: A big 15 inch subwoofer with powerful, punchy bass at a budget price, great for movies in a large room. The tradeoff: Budget-tier design, ported room gain dependency, 66.1 lbs (30 kg) mid-size, and limited dynamic headroom.
Why pick the Polk Audio DSW PRO 660: A down ported 12 inch subwoofer with deep, floor shaking bass and clean control for movies and music, now discontinued. Watch for: Output falls to 98.0dB at 25Hz and 88.0dB at 20Hz, so the lowest octave is limited.
Buy the Monoprice SW-15, since the Polk Audio DSW PRO 660 is discontinued and only worth hunting down used.
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 down ported 12 inch subwoofer with deep, floor shaking bass and clean control for movies and music, now discontinued.
Prices on this page were last checked October 29, 2026 at 4:42 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 | Polk Audio DSW PRO 660 | |
|---|---|---|
| Price | $499.99 | $699 Discontinued |
| Ranked | #14 of 212 in Medium Home Subwoofers (30-75 lbs) | #20 of 212 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 | 88.0 dB |
| Output SPL at 25 Hz | 106.3 dB | 98.0 dB |
| Output SPL at 31.5 Hz | 111.2 dB | 110.7 dB |
| Output SPL at 40 Hz | 116.0 dB | 115.3 dB |
| Output SPL at 50 Hz | 120.2 dB | 119.4 dB |
| Output SPL at 63 Hz | 120.5 dB | 122.0 dB |
| Output SPL at 80 Hz | 119.5 dB | 120.9 dB |
| CEA-2010-A Average (40-80Hz) | 119.0 dB | 119.4 dB |
| Dimensions | 18.1”H x 21”W x 22.7”D (459.7 x 533.4 x 576.6 mm) | 17.1”H x 16.5”W x 16.5”D (435.1 x 419.1 x 419.1 mm) |
| Weight | 66.1 lbs (30.0 kg) | 45 lbs (20.4 kg) |
| Warranty | 1 | 5/3 |
| Cabinet Color | black | black |
| Country | United States | United States |
| Measurement Source | Audioholics | Brent Butterworth |
| Frequency Response | 30-150Hz (-10dB) | 25-125Hz |
| Amplifier Power | 600W RMS / 800W peak | 400W 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 |
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