Short answer: the Funk Audio Ultra 21.0LX for the higher ranking, the Reaction Audio PV-15X for the lower price. The Funk Audio Ultra 21.0LX ranks #14 of 97 subwoofers at $9487.26. The Reaction Audio PV-15X ranks #16 at $1999, $7488.26 cheaper.
On the Reaction Audio PV-15X side: 15-inch ported driver delivers 126.2dB CEA-2010-A average from a purpose-built cinema-style cabinet. Set against that: Passive design requires a separate external amplifier and weighs 68 kg.
One note: the Reaction Audio PV-15X is discontinued, but it still ranks #16 of 97 subwoofers, ahead of most of what is still sold new, so it is worth considering used.
Buy the Funk Audio Ultra 21.0LX if the ranking matters more than the price. Buy the Reaction Audio PV-15X if the price matters more than the ranking.
Specifications Side By Side
| Funk Audio Ultra 21.0LX | Reaction Audio PV-15X | |
|---|---|---|
| Price | $9,487.26 | $1999 Discontinued |
| Ranked | #14 of 97 in Large Powered Home Subwoofers (Over 75 lbs) | #16 of 97 in Large Powered Home Subwoofers (Over 75 lbs) |
| Enclosure | sealed | ported, rear |
| Output SPL at 10 Hz | 99.9 dB | - |
| Output SPL at 12.5 Hz | 102.3 dB | - |
| Output SPL at 15 Hz | 108.4 dB | 105.3 dB |
| Output SPL at 20 Hz | 116.6 dB | 111.3 dB |
| Output SPL at 25 Hz | 120.5 dB | 116.1 dB |
| Output SPL at 31.5 Hz | 121.2 dB | 119.8 dB |
| Output SPL at 40 Hz | 125.0 dB | 125.3 dB |
| Output SPL at 50 Hz | 127.2 dB | 126.8 dB |
| Output SPL at 63 Hz | 126.5 dB | 126.1 dB |
| Output SPL at 80 Hz | 126.6 dB | 126.5 dB |
| Output SPL at 100 Hz | 127.6 dB | 126.4 dB |
| CEA-2010-A Average (40-80Hz) | 126.3 dB | 126.2 dB |
| Dimensions | 25.5"H x 24.5"W x 24.0"D (647.7 x 622.3 x 609.6 mm) | 18.0"H x 22.0"W x 29.0"D (457.2 x 558.8 x 736.6 mm) |
| Weight | 145.1 lbs / 65.8 kg | 149.9 lbs / 68 kg |
| Warranty | 3 | - |
| Cabinet Color | wood, custom | - |
| Country | Canada | - |
| Measurement Source | Manufacturer | Data-bass |
| Drivers | 21" (533mm) driver | 15" (381mm) driver |
| Output SPL at 125 Hz | - | 126.1 dB |
| Discontinued | - | Yes |
The Two Speakers In Full
Funk Audio Ultra 21.0LX: $9,487.26
| CEA-2010-A Average (40-80Hz) | 126.3 dB |
|---|---|
| Cabinet Color | wood, custom |
| Country | Canada |
| Dimensions | 25.5"H x 24.5"W x 24.0"D (647.7 x 622.3 x 609.6 mm) |
| Drivers | 21" (533mm) driver |
| Enclosure | sealed |
| Measurement Source | Manufacturer |
| Output SPL at 10 Hz | 99.9 dB |
| Output SPL at 12.5 Hz | 102.3 dB |
| Output SPL at 15 Hz | 108.4 dB |
| Output SPL at 20 Hz | 116.6 dB |
| Output SPL at 25 Hz | 120.5 dB |
| Output SPL at 31.5 Hz | 121.2 dB |
| Output SPL at 40 Hz | 125.0 dB |
| Output SPL at 50 Hz | 127.2 dB |
| Output SPL at 63 Hz | 126.5 dB |
| Output SPL at 80 Hz | 126.6 dB |
| Output SPL at 100 Hz | 127.6 dB |
| Warranty | 3 |
| Weight | 145.1 lbs / 65.8 kg |
- Head-to-Head Comparisons
- Links
Reaction Audio PV-15X: $1999 Discontinued
Pros: 15-inch ported driver delivers 126.2dB CEA-2010-A average from a purpose-built cinema-style cabinet.
Cons: Passive design requires a separate external amplifier and weighs 68 kg. Discontinued.
| CEA-2010-A Average (40-80Hz) | 126.2 dB |
|---|---|
| Dimensions | 18.0"H x 22.0"W x 29.0"D (457.2 x 558.8 x 736.6 mm) |
| Discontinued | Yes |
| Drivers | 15" (381mm) driver |
| Enclosure | ported, rear |
| Measurement Source | Data-bass |
| Output SPL at 15 Hz | 105.3 dB |
| Output SPL at 20 Hz | 111.3 dB |
| Output SPL at 25 Hz | 116.1 dB |
| Output SPL at 31.5 Hz | 119.8 dB |
| Output SPL at 40 Hz | 125.3 dB |
| Output SPL at 50 Hz | 126.8 dB |
| Output SPL at 63 Hz | 126.1 dB |
| Output SPL at 80 Hz | 126.5 dB |
| Output SPL at 100 Hz | 126.4 dB |
| Output SPL at 125 Hz | 126.1 dB |
| Weight | 149.9 lbs / 68 kg |
- Buy Used
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- 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.