Short answer: the Funk Audio Ultra 21.0LX, if you are buying new. The Reaction Audio PV-15X measures as well as it (#21 vs #19 of 110 subwoofers, 4.4/5 vs 4.4/5) but is discontinued, so only consider it used; the Funk Audio Ultra 21.0LX is still sold new at $9487.26.
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 (149.9 lbs).
Buy the Funk Audio Ultra 21.0LX new; the Reaction Audio PV-15X is no longer sold new, so it only makes sense as a used find.
Want more options? Browse the full Subwoofers rankings.
Specifications Side By Side
| Funk Audio Ultra 21.0LX | Reaction Audio PV-15X | |
|---|---|---|
| Price | $9,487.26 | $1999 Discontinued |
| Ranked | #19 of 110 in Large Home Subwoofers (Over 75 lbs) | #21 of 110 in Large 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"D (647.7 x 622.3 x 609.6 mm) | 18"H x 22"W x 29"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 |
| Inputs | XLR (balanced) | - |
| XLR Input | Yes | - |
| RCA Input | No | - |
| TRS Input | No | - |
| Optical Input | No | - |
| Coaxial Input | No | - |
| USB Input | No | - |
| HDMI Input | No | - |
| AES Input | No | - |
| Aux Input | No | - |
| Output SPL at 125 Hz | - | 126.1 dB |
| Discontinued | - | Yes |
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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
Funk Audio Ultra 21.0LX: $9,487.26 eBay
Pros: Published CEA-2010 specifications list 116.6 dB at 20 Hz and 126.3 dB through 40-80 Hz. The sealed enclosure with 21” (533mm) driver has the headroom for demanding film bass in a large room.
Cons: The 647.7H x 622.3W x 609.6D mm cabinet and 65.8 kg mass make this a serious placement and moving commitment. A sealed cabinet still needs careful placement and calibration to avoid room-mode peaks.
Full Funk Audio Ultra 21.0LX review and specifications →
| AES Input | No |
|---|---|
| Aux Input | No |
| CEA-2010-A Average (40-80Hz) | 126.3 dB |
| Cabinet Color | wood, custom |
| Coaxial Input | No |
| Country | Canada |
| Dimensions | 25.5"H x 24.5"W x 24"D (647.7 x 622.3 x 609.6 mm) |
| Drivers | 21" (533mm) driver |
| Enclosure | sealed |
| HDMI Input | No |
| Inputs | XLR (balanced) |
| Measurement Source | Manufacturer |
| Optical Input | No |
| 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 |
| RCA Input | No |
| TRS Input | No |
| USB Input | No |
| Warranty | 3 |
| Weight | 145.1 lbs (65.8 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- These figures are manufacturer-specified rather than independently measured.
- Head-to-Head Comparisons
Reaction Audio PV-15X: $1999 Discontinued eBay
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.
Full Reaction Audio PV-15X review and specifications →
| CEA-2010-A Average (40-80Hz) | 126.2 dB |
|---|---|
| Dimensions | 18"H x 22"W x 29"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) |
- Reviews, Comparisons and Sound Samples
- Independently measured by Data-bass; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons
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