Short answer: the Monoprice SW-15. It ranks #14 of 212 subwoofers by sound quality (rated 4.1/5) at $499.99 and is still sold new; the BK Electronics XLS300/PR ranks #179 (rated 3.3/5) and is discontinued, so it is only an option used.
The Monoprice SW-15 is the better-sounding option. 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.
The case for the BK Electronics XLS300/PR: A well made sealed 10 inch subwoofer with a black ash finish and both speaker level and line inputs. The tradeoff: Maximum output is modest, only 92.3dB at 20Hz and 107.9dB average from 40 to 80Hz, which is limited for a large room.
Buy the Monoprice SW-15. It is rated higher for sound quality and still sold new, while the BK Electronics XLS300/PR is discontinued.
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 well made sealed 10 inch subwoofer with a black ash finish and both speaker level and line inputs.
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 | BK Electronics XLS300/PR | |
|---|---|---|
| Price | $499.99 | £389.00 Discontinued |
| Ranked | #14 of 212 in Medium Home Subwoofers (30-75 lbs) | #179 of 212 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 |
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