Short answer: the HSU Research ULS-15 MK2 for value, the Kef KC62 for a tiny sealed cabinet. The ULS-15 MK2’s sealed design delivers tight, accurate bass with low bloat and it costs $700.99 less. The KC62 crams dual 6.5-inch force-canceling drivers and 1000W into an ultra-compact, basketball-sized sealed enclosure.
The case for the HSU Research ULS-15 MK2: Sealed design delivers tight, accurate bass with low bloat.
What the Kef KC62 gets right: Dual 6.5-inch force-canceling drivers with 1000W in ultra-compact basketball-sized sealed enclosure.
Buy the HSU Research ULS-15 MK2. It is rated higher for sound quality than the Kef KC62 and costs less, which settles it without a real tradeoff to make.
Want more options? Browse the full Subwoofers rankings.
Specifications Side By Side
| HSU Research ULS-15 MK2 | Kef KC62 | |
|---|---|---|
| Price | $1,035 | $1,699.99 |
| Ranked | #3 of 145 in Medium Home Subwoofers (30-75 lbs) | #145 of 145 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | sealed | sealed |
| 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 | 80.0 dB |
| Output SPL at 25 Hz | 107.7 dB | 84.6 dB |
| Output SPL at 31.5 Hz | 113.4 dB | 88.5 dB |
| Output SPL at 40 Hz | 118.3 dB | 92.2 dB |
| Output SPL at 50 Hz | 120.8 dB | 95.1 dB |
| Output SPL at 63 Hz | 121.2 dB | 97.7 dB |
| Output SPL at 80 Hz | 121.1 dB | 102.6 dB |
| Output SPL at 100 Hz | 120.7 dB | 104.2 dB |
| Output SPL at 125 Hz | 120.7 dB | - |
| CEA-2010-A Average (40-80Hz) | 120.3 dB | 96.9 dB |
| Dimensions | 19"H x 18"W x 19.5"D (482.6 x 457.2 x 495.3 mm) | 9.7"H x 10.1"W x 9.8"D (245.9 x 255.8 x 247.9 mm) |
| Weight | 65 lbs (29.5 kg) | 30.9 lbs (14.0 kg) |
| Warranty | 7/2(+3) | 5/2/5 |
| Cabinet Color | black, wood | black, white |
| Country | United States | United Kingdom |
| Measurement Source | Audioholics | ErinsAudioCorner |
| Frequency Response | 20-200Hz, ±1dB | 11-200Hz |
| Amplifier Power | 600W RMS / 2000W peak | 1000W RMS |
| Crossover Frequency | 30-90Hz adjustable | - |
| Phase Control | 0°-180° | - |
| Features | Q control, sealed subwoofer, EQ1/EQ2 modes | - |
| Drivers | 15" (381mm) driver | 2x 6.5" (165mm) driver |
Related Speaker Comparisons
More worthwhile head-to-heads for HSU Research ULS-15 MK2:
- HSU Research ULS-15 MK2 vs JTR Speakers Captivator 212PRO
- HSU Research ULS-15 MK2 vs MartinLogan Dynamo 1600X
- HSU Research ULS-15 MK2 vs Monoprice SW-12
- HSU Research ULS-15 MK2 vs Power Sound Audio (PSA) XV15
- HSU Research ULS-15 MK2 vs Paradigm Defiance X12
Prices on this page were last checked September 23, 2026 at 11:24 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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The Two Speakers In Full
HSU Research ULS-15 MK2: $1,035 HSU Research eBay
Pros: Sealed design delivers tight, accurate bass with low bloat. 600W BASH amplifier. 30% less expensive and 20 lbs lighter than predecessor. Easy integration with Q and EQ controls. Great value in the 15” sub market.
Notes: Price includes shipping
Full HSU Research ULS-15 MK2 review and specifications →
| Amplifier Power | 600W RMS / 2000W peak |
|---|---|
| CEA-2010-A Average (40-80Hz) | 120.3 dB |
| Cabinet Color | black, wood |
| Country | United States |
| Crossover Frequency | 30-90Hz adjustable |
| Dimensions | 19"H x 18"W x 19.5"D (482.6 x 457.2 x 495.3 mm) |
| Drivers | 15" (381mm) driver |
| Enclosure | sealed |
| Features | Q control, sealed subwoofer, EQ1/EQ2 modes |
| Frequency Response | 20-200Hz, ±1dB |
| Measurement Source | Audioholics |
| 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 |
| Output SPL at 25 Hz | 107.7 dB |
| Output SPL at 31.5 Hz | 113.4 dB |
| Output SPL at 40 Hz | 118.3 dB |
| Output SPL at 50 Hz | 120.8 dB |
| Output SPL at 63 Hz | 121.2 dB |
| Output SPL at 80 Hz | 121.1 dB |
| Output SPL at 100 Hz | 120.7 dB |
| Output SPL at 125 Hz | 120.7 dB |
| Phase Control | 0°-180° |
| Warranty | 7/2(+3) |
| Weight | 65 lbs (29.5 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Audioholics; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons
- HSU Research ULS-15 MK2 vs MartinLogan Dynamo 1600X
- HSU Research ULS-15 MK2 vs JTR Speakers Captivator 212PRO
- HSU Research ULS-15 MK2 vs Monoprice SW-12
- HSU Research ULS-15 MK2 vs Power Sound Audio (PSA) XV15
- HSU Research ULS-15 MK2 vs Paradigm Defiance X12
- HSU Research ULS-15 MK2 vs Monoprice SW-15
- HSU Research ULS-15 MK2 vs SVS SB-3000
- HSU Research ULS-15 MK2 vs Klipsch SPL-120
- See all 19 comparisons
Kef KC62: $1,699.99 Amazon eBay
Pros: Dual 6.5-inch force-canceling drivers with 1000W in ultra-compact basketball-sized sealed enclosure. Deep extension to 11Hz with five room placement EQ presets. Elegant design fits any décor.
Full Kef KC62 review and specifications →
| Amplifier Power | 1000W RMS |
|---|---|
| CEA-2010-A Average (40-80Hz) | 96.9 dB |
| Cabinet Color | black, white |
| Country | United Kingdom |
| Dimensions | 9.7"H x 10.1"W x 9.8"D (245.9 x 255.8 x 247.9 mm) |
| Drivers | 2x 6.5" (165mm) driver |
| Enclosure | sealed |
| Frequency Response | 11-200Hz |
| Measurement Source | ErinsAudioCorner |
| Output SPL at 20 Hz | 80.0 dB |
| Output SPL at 25 Hz | 84.6 dB |
| Output SPL at 31.5 Hz | 88.5 dB |
| Output SPL at 40 Hz | 92.2 dB |
| Output SPL at 50 Hz | 95.1 dB |
| Output SPL at 63 Hz | 97.7 dB |
| Output SPL at 80 Hz | 102.6 dB |
| Output SPL at 100 Hz | 104.2 dB |
| Warranty | 5/2/5 |
| Weight | 30.9 lbs (14.0 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by ErinsAudioCorner; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons