Short answer: the Monoprice Monolith M-215, if you are buying new. The Reaction Audio PV-15X measures as well as it (#22 vs #24 of 143 subwoofers, 4.4/5 vs 4.4/5) but is discontinued, so only consider it used; the Monoprice Monolith M-215 is still sold new at $1,499.99.
Buy the Monoprice Monolith M-215 new; the Reaction Audio PV-15X is no longer sold new, so it only makes sense as a used find.
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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
| Monoprice Monolith M-215 | Reaction Audio PV-15X | |
|---|---|---|
| Price | $1,499.99 | $1,999 Passive, Discontinued |
| Ranked | #24 of 143 in Large Home Subwoofers (Over 75 lbs) | #22 of 143 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | ported, front | ported, rear |
| Output SPL at 12.5 Hz | 103.9 dB | - |
| Output SPL at 15 Hz | 113.1 dB | 105.3 dB |
| Output SPL at 20 Hz | 118.9 dB | 111.3 dB |
| Output SPL at 25 Hz | 122.6 dB | 116.1 dB |
| Output SPL at 31.5 Hz | 125.2 dB | 119.8 dB |
| Output SPL at 40 Hz | 126.4 dB | 125.3 dB |
| Output SPL at 50 Hz | 126.1 dB | 126.8 dB |
| Output SPL at 63 Hz | 125.6 dB | 126.1 dB |
| Output SPL at 80 Hz | 125.6 dB | 126.5 dB |
| Output SPL at 100 Hz | 125.7 dB | 126.4 dB |
| Output SPL at 125 Hz | 126.3 dB | 126.1 dB |
| CEA-2010-A Average (40-80Hz) | 125.9 dB | 126.2 dB |
| Dimensions | 42.3”H x 20”W x 27.6”D (1074.4 x 508.0 x 701.0 mm) | 18”H x 22”W x 29”D (457.2 x 558.8 x 736.6 mm) |
| Weight | 216.1 lbs (98.0 kg) | 149.9 lbs (68 kg) |
| Warranty | 5 | - |
| Cabinet Color | black | - |
| Country | United States | - |
| Measurement Source | Brent Butterworth | Data-bass |
| Drivers | 2x 15” (381mm) drivers | 15” (381mm) driver |
| Passive | - | Yes |
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