Short answer: the WW Speaker Cabinets X21 for maximum output. Its 21-inch driver in a large ported cabinet averages 131.3dB on CEA-2010-A, the highest output of any passive subwoofer tested, and it ranks #3 of 143. The Danley Sound Labs DTS10’s dual 12-inch tapped horn still averages 129.6dB and remains in production, but it needs an external amplifier, weighs 284.4 lbs (129 kg) and ranks #14.
Buy the WW Speaker Cabinets X21 - B&C 21DS115-4. It is rated higher for sound quality than the Danley Sound Labs DTS10 and costs less, so only choose the other one for a particular feature it does better.
Looking for alternatives? See the complete Subwoofers rankings.
Prices on this page were last checked November 7, 2026 at 7:34 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
| Danley Sound Labs DTS10 | WW Speaker Cabinets X21 - B&C 21DS115-4 | |
|---|---|---|
| Price | $4,400 Passive | $3,995 Passive |
| Ranked | #14 of 143 in Large Home Subwoofers (Over 75 lbs) | #3 of 143 in Large 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”H x 59.5”W x 16”D (1117.6 x 1511.3 x 406.4 mm) | 24”H x 32”W x 32”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 | United States |
| Measurement Source | Data-bass | Data-bass |
| Drivers | 2x 12” (305mm) driver | 21” (533mm) driver |
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