Short answer: the Monoprice SW-15 if sound quality matters most, the Monoprice 12in 150-Watt Powered if price matters most. The Monoprice SW-15 ranks #14 of 212 subwoofers, rated 4.1/5, at $499.99. The Monoprice 12in 150-Watt Powered ranks #126, rated 3.6/5, at $186.48, $313.51 cheaper.
The Monoprice SW-15 is the better-sounding choice. A big 15 inch subwoofer with powerful, punchy bass at a budget price, great for movies in a large room. Watch for: Budget-tier design, ported room gain dependency, 66.1 lbs (30 kg) mid-size, and limited dynamic headroom.
The case for the Monoprice 12in 150-Watt Powered: A very cheap 12 inch ported subwoofer that plays loud for the money, a simple first subwoofer for movies. The catch: Output drops off below about 50Hz, port chuffing becomes audible around 35Hz on bass drops, and a resonance near 100Hz was audible in outdoor testing.
Buy the Monoprice SW-15 when sound quality outweighs the price for you, and the Monoprice 12in 150-Watt Powered when the price outweighs sound quality instead.
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 very cheap 12 inch ported subwoofer that plays loud for the money, a simple first subwoofer for movies.
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 | Monoprice 12in 150-Watt Powered | |
|---|---|---|
| Price | $499.99 | $186.48 |
| Ranked | #14 of 212 in Medium Home Subwoofers (30-75 lbs) | #126 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 | 90.2 dB |
| Output SPL at 25 Hz | 106.3 dB | 89.8 dB |
| Output SPL at 31.5 Hz | 111.2 dB | 99.7 dB |
| Output SPL at 40 Hz | 116.0 dB | 105.1 dB |
| Output SPL at 50 Hz | 120.2 dB | 110.6 dB |
| Output SPL at 63 Hz | 120.5 dB | 115.7 dB |
| Output SPL at 80 Hz | 119.5 dB | 115.4 dB |
| CEA-2010-A Average (40-80Hz) | 119.0 dB | 111.7 dB |
| Dimensions | 18.1”H x 21”W x 22.7”D (459.7 x 533.4 x 576.6 mm) | 17”H x 17.3”W x 17.5”D (431.8 x 439.4 x 444.5 mm) |
| Weight | 66.1 lbs (30.0 kg) | 53.8 lbs (24.4 kg) |
| Warranty | 1 | - |
| Cabinet Color | black | black |
| Country | United States | United States |
| Measurement Source | Audioholics | ErinsAudioCorner |
| Frequency Response | 30-150Hz (-10dB) | 25-250Hz |
| Amplifier Power | 600W RMS / 800W peak | 150W 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 |
| Output SPL at 100 Hz | - | 114.2 dB |
| Output SPL at 125 Hz | - | 113.3 dB |
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