Short answer: the RSL Speedwoofer 10S MKII for value, the HSU Research ULS-15 MK2 for a sealed design. The 10S MKII is a 10-inch ported sub with a 400W RMS (1020W peak) XDR amplifier, and it costs $500 less. The ULS-15 MK2’s sealed design delivers tight, accurate bass with low bloat.
Buy the HSU Research ULS-15 MK2. It is rated higher for sound quality, and saving $500 with the RSL (Rogersound Labs) Speedwoofer 10S MKII does not make up for the sound-quality gap.
Looking for alternatives? See the complete Subwoofers rankings.
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Specifications Side By Side
| HSU Research ULS-15 MK2 | RSL (Rogersound Labs) Speedwoofer 10S MKII | |
|---|---|---|
| Price | $999.00 | $499 |
| Ranked | #4 of 212 in Medium Home Subwoofers (30-75 lbs) | #124 of 212 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | sealed | ported, rear |
| Output SPL at 12.5 Hz | 93.7 dB | - |
| Output SPL at 15 Hz | 98.0 dB | 89.0 dB |
| Output SPL at 20 Hz | 102.4 dB | 100.0 dB |
| Output SPL at 25 Hz | 107.7 dB | 105.0 dB |
| Output SPL at 31.5 Hz | 113.4 dB | 107.7 dB |
| Output SPL at 40 Hz | 118.3 dB | 110.3 dB |
| Output SPL at 50 Hz | 120.8 dB | 112.9 dB |
| Output SPL at 63 Hz | 121.2 dB | 113.0 dB |
| Output SPL at 80 Hz | 121.1 dB | 112.1 dB |
| Output SPL at 100 Hz | 120.7 dB | 111.4 dB |
| Output SPL at 125 Hz | 120.7 dB | 110.7 dB |
| CEA-2010-A Average (40-80Hz) | 120.3 dB | 112.1 dB |
| Dimensions | 19”H x 18”W x 19.5”D (482.6 x 457.2 x 495.3 mm) | 15.5”H x 15”W x 15.7”D (393.7 x 381.0 x 400.0 mm) |
| Weight | 65 lbs (29.5 kg) | 40.6 lbs (18.4 kg) |
| Warranty | 7/2(+3) | 5/2 |
| Cabinet Color | black, wood | black, white |
| Country | United States | United States |
| Measurement Source | Audioholics | Audioholics |
| Frequency Response | 20-200Hz, ±1dB | 21-200Hz |
| Amplifier Power | 600W RMS / 2000W peak | 400W RMS |
| Crossover Frequency | 30-90Hz adjustable | - |
| Phase Control | 0°-180° | - |
| Features | Q control, sealed subwoofer, EQ1/EQ2 modes | - |
| Drivers | 15” (381mm) driver | 10” (254mm) driver |
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