Short answer: the WW Speaker Cabinets X21 - B&C 21DS115-4. It ranks #1 of 7 subwoofers at $3995; the Danley Sound Labs DTS10 ranks #3 and costs $4400, so there is not much of a tradeoff to weigh.
What the Danley Sound Labs DTS10 gets right: Dual 12-inch tapped horn design delivers 129.6dB CEA-2010-A average and remains in current production. The catch: Requires external amplifier, extremely heavy at 129 kg, very large cabinet, and specialized tapped-horn design.
On the WW Speaker Cabinets X21 - B&C 21DS115-4 side: 21-inch driver in a large ported cabinet delivers 131.3dB CEA-2010-A average, the highest output of any passive subwoofer tested. The tradeoff: Premium $3,995 price, massive 52 kg cabinet, and ported room gain dependency.
Buy the Danley Sound Labs DTS10 if the price matters more than the ranking. Buy the WW Speaker Cabinets X21 - B&C 21DS115-4 if the ranking matters more than the price.
Specifications Side By Side
| Danley Sound Labs DTS10 | WW Speaker Cabinets X21 - B&C 21DS115-4 | |
|---|---|---|
| Price | $4,400 | $3995 |
| Ranked | #3 of 7 in Large Passive Home Subwoofers (Over 75 lbs) | #1 of 7 in Large Passive Home Subwoofers (Over 75 lbs) |
| Enclosure | tapped horn | ported, front |
| Passive | Yes | Yes |
| Output SPL at 10 Hz | 94.2 dB | - |
| Output SPL at 12.5 Hz | 110.6 dB | 96.2 dB |
| Output SPL at 15 Hz | 119.0 dB | 111.9 dB |
| Output SPL at 20 Hz | 122.5 dB | 121.9 dB |
| Output SPL at 25 Hz | 125.5 dB | 120.8 dB |
| Output SPL at 31.5 Hz | 128.3 dB | 122.5 dB |
| Output SPL at 40 Hz | 125.3 dB | 126.7 dB |
| Output SPL at 50 Hz | 127.3 dB | 129.2 dB |
| Output SPL at 63 Hz | 130.9 dB | 132.9 dB |
| Output SPL at 80 Hz | 135.0 dB | 136.3 dB |
| Output SPL at 100 Hz | 133.0 dB | 139.0 dB |
| Output SPL at 125 Hz | 128.7 dB | 140.1 dB |
| CEA-2010-A Average (40-80Hz) | 129.6 dB | 131.3 dB |
| Dimensions | 44.0"H x 59.5"W x 16.0"D (1117.6 x 1511.3 x 406.4 mm) | 24.0"H x 32.0"W x 32.0"D (609.6 x 812.8 x 812.8 mm) |
| Weight | 285.1 lbs / 129.3 kg | 115.1 lbs / 52.2 kg |
| Warranty | 5 | - |
| Cabinet Color | black | - |
| Country | United States | - |
| Measurement Source | Data-bass | Data-bass |
| Drivers | 2x 12" (305mm) driver | 21" (533mm) driver |
The Two Speakers In Full
Danley Sound Labs DTS10: $4,400
Pros: Dual 12-inch tapped horn design delivers 129.6dB CEA-2010-A average and remains in current production, unlike most of the subwoofers ranked above it.
Cons: Requires external amplifier, extremely heavy at 129 kg, very large cabinet, and specialized tapped-horn design.
| CEA-2010-A Average (40-80Hz) | 129.6 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 44.0"H x 59.5"W x 16.0"D (1117.6 x 1511.3 x 406.4 mm) |
| Drivers | 2x 12" (305mm) driver |
| Enclosure | tapped horn |
| Measurement Source | Data-bass |
| Output SPL at 10 Hz | 94.2 dB |
| Output SPL at 12.5 Hz | 110.6 dB |
| Output SPL at 15 Hz | 119.0 dB |
| Output SPL at 20 Hz | 122.5 dB |
| Output SPL at 25 Hz | 125.5 dB |
| Output SPL at 31.5 Hz | 128.3 dB |
| Output SPL at 40 Hz | 125.3 dB |
| Output SPL at 50 Hz | 127.3 dB |
| Output SPL at 63 Hz | 130.9 dB |
| Output SPL at 80 Hz | 135.0 dB |
| Output SPL at 100 Hz | 133.0 dB |
| Output SPL at 125 Hz | 128.7 dB |
| Passive | Yes |
| Warranty | 5 |
| Weight | 285.1 lbs / 129.3 kg |
- Head-to-Head Comparisons
- Links
WW Speaker Cabinets X21 - B&C 21DS115-4: $3995
Pros: 21-inch driver in a large ported cabinet delivers 131.3dB CEA-2010-A average, the highest output of any passive subwoofer tested.
Cons: Premium $3,995 price, massive 52 kg cabinet, and ported room gain dependency.
| CEA-2010-A Average (40-80Hz) | 131.3 dB |
|---|---|
| Dimensions | 24.0"H x 32.0"W x 32.0"D (609.6 x 812.8 x 812.8 mm) |
| Drivers | 21" (533mm) driver |
| Enclosure | ported, front |
| Measurement Source | Data-bass |
| Output SPL at 12.5 Hz | 96.2 dB |
| Output SPL at 15 Hz | 111.9 dB |
| Output SPL at 20 Hz | 121.9 dB |
| Output SPL at 25 Hz | 120.8 dB |
| Output SPL at 31.5 Hz | 122.5 dB |
| Output SPL at 40 Hz | 126.7 dB |
| Output SPL at 50 Hz | 129.2 dB |
| Output SPL at 63 Hz | 132.9 dB |
| Output SPL at 80 Hz | 136.3 dB |
| Output SPL at 100 Hz | 139.0 dB |
| Output SPL at 125 Hz | 140.1 dB |
| Passive | Yes |
| Weight | 115.1 lbs / 52.2 kg |
- Head-to-Head Comparisons
- Links
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Product prices and availability were last checked August 9, 2026 at 6:57 AM UTC 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.