Short answer: the HSU Research ULS-15 MK2 if sound quality matters most, the Klipsch SPL-120 if price matters most. The HSU Research ULS-15 MK2 ranks #4 of 212 subwoofers, rated 4.2/5, at $999. The Klipsch SPL-120 ranks #19, rated 4.1/5, at $429.99, $569.01 cheaper.
Why pick the HSU Research ULS-15 MK2: A sealed 15 inch subwoofer with tight, accurate bass, a great value in large subs. The tradeoff: No phone app or room correction, so setup is manual, and it ships in a plain vinyl finish where a similarly priced SVS offers gloss black.
What the Klipsch SPL-120 does well: An affordable 12 inch ported subwoofer with room filling, clean bass and optional wireless connection. The catch: Port chuffing is the known flaw: testers could not run it past about 60 to 70% volume before the noise became bothersome, a problem Klipsch fixed in the newer Klipsch RP-1200SW.
Buy the HSU Research ULS-15 MK2 when sound quality outweighs the price for you, and the Klipsch SPL-120 when the price outweighs sound quality instead.
Still deciding? The full Subwoofers rankings cover every ranked option.
A sealed 15 inch subwoofer with tight, accurate bass, a great value in large subs.
An affordable 12 inch ported subwoofer with room filling, clean bass and optional wireless connection.
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
| HSU Research ULS-15 MK2 | Klipsch SPL-120 | |
|---|---|---|
| Price | $999.00 | $429.99 |
| Ranked | #4 of 212 in Medium Home Subwoofers (30-75 lbs) | #19 of 212 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | sealed | ported, front |
| Output SPL at 12.5 Hz | 93.7 dB | - |
| Output SPL at 15 Hz | 98.0 dB | - |
| Output SPL at 20 Hz | 102.4 dB | 97.9 dB |
| Output SPL at 25 Hz | 107.7 dB | 108.2 dB |
| Output SPL at 31.5 Hz | 113.4 dB | 113.5 dB |
| Output SPL at 40 Hz | 118.3 dB | 116.8 dB |
| Output SPL at 50 Hz | 120.8 dB | 119.8 dB |
| Output SPL at 63 Hz | 121.2 dB | 120.9 dB |
| Output SPL at 80 Hz | 121.1 dB | 121.2 dB |
| Output SPL at 100 Hz | 120.7 dB | - |
| Output SPL at 125 Hz | 120.7 dB | - |
| CEA-2010-A Average (40-80Hz) | 120.3 dB | 119.7 dB |
| Dimensions | 19”H x 18”W x 19.5”D (482.6 x 457.2 x 495.3 mm) | 17.7”H x 14.7”W x 19.9”D (450.8 x 372.9 x 504.7 mm) |
| Weight | 65 lbs (29.5 kg) | 45 lbs (20.4 kg) |
| Warranty | 7/2(+3) | 5/2 |
| Cabinet Color | black, wood | black |
| Country | United States | United States |
| Measurement Source | Audioholics | Brent Butterworth |
| Frequency Response | 20-200Hz, ±1dB | 24-125Hz |
| Amplifier Power | 600W RMS / 2000W peak | 300W RMS |
| Crossover Frequency | 30-90Hz adjustable | - |
| Phase Control | 0°-180° | - |
| Features | Q control, sealed subwoofer, EQ1/EQ2 modes | - |
| Drivers | 15” (381mm) driver | 12” (305mm) driver |
| Output SPL at 16 Hz | - | 87.2 dB |
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