Short answer: the Monoprice SW-15. It ranks #14 of 212 subwoofers by sound quality, rated 4.1/5, at $499.99; the OEM Systems ICBM ranks #29, rated 3.9/5, and costs $1,725, so there is little reason to consider the other one.
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.
What the OEM Systems ICBM does well: A hidden in-wall subwoofer system with four 8 inch drivers that fits a standard stud bay and delivers strong movie bass. The catch: Custom-install product: no combined system weight is published, and a 2-driver variant of this kit is not currently sold anywhere verified, so only the 4-driver configuration is listed here.
Buy the Monoprice SW-15. It is rated higher for sound quality than the OEM Systems ICBM and costs less, which makes it the one to get unless you need something the other one does better.
Still deciding? The full Subwoofers rankings cover every ranked option.
A big 15 inch subwoofer with powerful, punchy bass at a budget price, great for movies in a large room.
A hidden in-wall subwoofer system with four 8 inch drivers that fits a standard stud bay and delivers strong movie bass.
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 | OEM Systems ICBM | |
|---|---|---|
| Price | $499.99 | $1,725 |
| Ranked | #14 of 212 in Medium Home Subwoofers (30-75 lbs) | #29 of 212 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | ported, bottom | sealed, in-wall |
| Output SPL at 15 Hz | 90.0 dB | - |
| Output SPL at 20 Hz | 101.2 dB | 97.5 dB |
| Output SPL at 25 Hz | 106.3 dB | 100.4 dB |
| Output SPL at 31.5 Hz | 111.2 dB | 105.6 dB |
| Output SPL at 40 Hz | 116.0 dB | 111.3 dB |
| Output SPL at 50 Hz | 120.2 dB | 118.4 dB |
| Output SPL at 63 Hz | 120.5 dB | 121.2 dB |
| Output SPL at 80 Hz | 119.5 dB | - |
| CEA-2010-A Average (40-80Hz) | 119.0 dB | 117.0 dB (avg of 3/4 bands) |
| Dimensions | 18.1”H x 21”W x 22.7”D (459.7 x 533.4 x 576.6 mm) | 29.5”H x 13.5”W x 3.4”D (749.3 x 342.9 x 85.7 mm) (enclosure) |
| Weight | 66.1 lbs (30.0 kg) | 100.1 lbs (45.4 kg) |
| Warranty | 1 | - |
| Cabinet Color | black | - |
| Country | United States | United States |
| 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 | (4) 8” (203mm) drivers |
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