Short answer: the Reaction Audio PV-15X for the higher ranking, the Monoprice Monolith M15-S for the lower price. The Reaction Audio PV-15X ranks #16 of 97 subwoofers at $1999. The Monoprice Monolith M15-S ranks #62 at $999, $1000 cheaper.
What the Reaction Audio PV-15X gets right: 15-inch ported driver delivers 126.2dB CEA-2010-A average from a purpose-built cinema-style cabinet. The catch: 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 Monoprice Monolith M15-S if the price matters more than the ranking. Buy the Reaction Audio PV-15X if the ranking matters more than the price.
Specifications Side By Side
| Monoprice Monolith M15-S | Reaction Audio PV-15X | |
|---|---|---|
| Price | $999 | $1999 Discontinued |
| Ranked | #62 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 15 Hz | 100.1 dB | 105.3 dB |
| Output SPL at 20 Hz | 105.6 dB | 111.3 dB |
| Output SPL at 25 Hz | 111.2 dB | 116.1 dB |
| Output SPL at 31.5 Hz | 115.2 dB | 119.8 dB |
| Output SPL at 40 Hz | 118.4 dB | 125.3 dB |
| Output SPL at 50 Hz | 119.3 dB | 126.8 dB |
| Output SPL at 63 Hz | 119.6 dB | 126.1 dB |
| Output SPL at 80 Hz | 118.9 dB | 126.5 dB |
| Output SPL at 100 Hz | 119.1 dB | 126.4 dB |
| Output SPL at 125 Hz | 118.9 dB | 126.1 dB |
| CEA-2010-A Average (40-80Hz) | 119.0 dB | 126.2 dB |
| Dimensions | 23.5"H x 16.7"W x 19.7"D (596.9 x 424.2 x 500.4 mm) | 18.0"H x 22.0"W x 29.0"D (457.2 x 558.8 x 736.6 mm) |
| Warranty | 5 | - |
| Country | United States | - |
| Measurement Source | Manufacturer | Data-bass |
| Weight | 80 lbs / 36.3 kg | 149.9 lbs / 68 kg |
| Drivers | 15" (381mm) driver | 15" (381mm) driver |
| Discontinued | - | Yes |
The Two Speakers In Full
Monoprice Monolith M15-S: $999
Notes: Product # 35141
| CEA-2010-A Average (40-80Hz) | 119.0 dB |
|---|---|
| Country | United States |
| Dimensions | 23.5"H x 16.7"W x 19.7"D (596.9 x 424.2 x 500.4 mm) |
| Drivers | 15" (381mm) driver |
| Enclosure | sealed |
| Measurement Source | Manufacturer |
| Output SPL at 15 Hz | 100.1 dB |
| Output SPL at 20 Hz | 105.6 dB |
| Output SPL at 25 Hz | 111.2 dB |
| Output SPL at 31.5 Hz | 115.2 dB |
| Output SPL at 40 Hz | 118.4 dB |
| Output SPL at 50 Hz | 119.3 dB |
| Output SPL at 63 Hz | 119.6 dB |
| Output SPL at 80 Hz | 118.9 dB |
| Output SPL at 100 Hz | 119.1 dB |
| Output SPL at 125 Hz | 118.9 dB |
| Warranty | 5 |
| Weight | 80 lbs / 36.3 kg |
- Head-to-Head Comparisons
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- Monoprice Monolith M15-S vs Monoprice Monolith M-215
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- See all 15 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
- Head-to-Head Comparisons
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- Reaction Audio PV-15X vs Funk Audio Ultra 21.0LX
- Reaction Audio PV-15X vs Monoprice Monolith M-215
- Reaction Audio PV-15X vs Monoprice Monolith 16 THX Ultra
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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.