Short answer: the Reaction Audio PV-15X. It ranks #21 of 110 subwoofers by sound quality, rated 4.4/5, at $1999. The Monoprice Monolith M-15 V2 ranks #64, rated 4.2/5, at $1500, $499 cheaper, which does not close the gap in sound quality.
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. Set against that: Passive design requires a separate external amplifier and weighs 68 kg (149.9 lbs).
Worth knowing: the Monoprice Monolith M-15 V2 has been discontinued and is hard to find new at this point.
Buy the Reaction Audio PV-15X. It is rated higher for sound quality, and the $499 saving on the Monoprice Monolith M-15 V2 is not enough to make up the difference.
Still deciding? The full Subwoofers rankings cover every ranked option.
Specifications Side By Side
| Monoprice Monolith M-15 V2 | Reaction Audio PV-15X | |
|---|---|---|
| Price | $1,500 Discontinued | $1999 Discontinued |
| Ranked | #64 of 110 in Large Home Subwoofers (Over 75 lbs) | #21 of 110 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | ported, front | ported, rear |
| Output SPL at 12.5 Hz | 91.0 dB | - |
| Output SPL at 15 Hz | 106.3 dB | 105.3 dB |
| Output SPL at 20 Hz | 112.6 dB | 111.3 dB |
| Output SPL at 25 Hz | 116.6 dB | 116.1 dB |
| Output SPL at 31.5 Hz | 119.5 dB | 119.8 dB |
| Output SPL at 40 Hz | 120.9 dB | 125.3 dB |
| Output SPL at 50 Hz | 120.6 dB | 126.8 dB |
| Output SPL at 63 Hz | 120.0 dB | 126.1 dB |
| Output SPL at 80 Hz | 118.7 dB | 126.5 dB |
| Output SPL at 100 Hz | 120.1 dB | 126.4 dB |
| Output SPL at 125 Hz | 120.2 dB | 126.1 dB |
| CEA-2010-A Average (40-80Hz) | 120.0 dB | 126.2 dB |
| Dimensions | 28.7"H x 17.7"W x 26.8"D (729.0 x 449.6 x 680.7 mm) | 18"H x 22"W x 29"D (457.2 x 558.8 x 736.6 mm) |
| Weight | 132.9 lbs (60.3 kg) | 149.9 lbs (68 kg) |
| Warranty | 5 | - |
| Cabinet Color | black | - |
| Country | United States | - |
| Measurement Source | Manufacturer | Data-bass |
| Drivers | 15" (381mm) driver | 15" (381mm) driver |
| Discontinued | Yes | Yes |
| Inputs | XLR, RCA | - |
| XLR Input | Yes | - |
| RCA Input | Yes | - |
| TRS Input | No | - |
| Optical Input | No | - |
| Coaxial Input | No | - |
| USB Input | No | - |
| HDMI Input | No | - |
| AES Input | No | - |
| Aux Input | No | - |
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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
Monoprice Monolith M-15 V2: $1,500 Discontinued eBay
Pros: Published CEA-2010 specifications list 112.6 dB at 20 Hz and 120.0 dB through 40-80 Hz. Its front-ported 15-inch design has substantial deep-bass and midbass headroom for cinema playback.
Cons: Discontinued and no longer sold new. At 60.3 kg and 729.0H x 449.6W x 680.7D mm, it needs committed floor space and careful room integration. Discontinued.
Notes: Product # 42851
Full Monoprice Monolith M-15 V2 review and specifications →
| AES Input | No |
|---|---|
| Aux Input | No |
| CEA-2010-A Average (40-80Hz) | 120.0 dB |
| Cabinet Color | black |
| Coaxial Input | No |
| Country | United States |
| Dimensions | 28.7"H x 17.7"W x 26.8"D (729.0 x 449.6 x 680.7 mm) |
| Discontinued | Yes |
| Drivers | 15" (381mm) driver |
| Enclosure | ported, front |
| HDMI Input | No |
| Inputs | XLR, RCA |
| Measurement Source | Manufacturer |
| Optical Input | No |
| Output SPL at 12.5 Hz | 91.0 dB |
| Output SPL at 15 Hz | 106.3 dB |
| Output SPL at 20 Hz | 112.6 dB |
| Output SPL at 25 Hz | 116.6 dB |
| Output SPL at 31.5 Hz | 119.5 dB |
| Output SPL at 40 Hz | 120.9 dB |
| Output SPL at 50 Hz | 120.6 dB |
| Output SPL at 63 Hz | 120.0 dB |
| Output SPL at 80 Hz | 118.7 dB |
| Output SPL at 100 Hz | 120.1 dB |
| Output SPL at 125 Hz | 120.2 dB |
| RCA Input | Yes |
| TRS Input | No |
| USB Input | No |
| Warranty | 5 |
| Weight | 132.9 lbs (60.3 kg) |
| XLR Input | Yes |
- Reviews, Comparisons and Sound Samples
- These figures are manufacturer-specified rather than independently measured.
- Head-to-Head Comparisons
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- See all 16 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
- Reaction Audio PV-15X vs JTR Speakers Captivator 2400
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- Reaction Audio PV-15X vs Chase Home Theater SS18.1
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