Monoprice Monolith M-15 V2 vs Reaction Audio PV-15X

Last updated: August 9, 2026

Short answer: the Reaction Audio PV-15X for the higher ranking, the Monoprice Monolith M-15 V2 for the lower price. The Reaction Audio PV-15X ranks #16 of 97 subwoofers at $1999. The Monoprice Monolith M-15 V2 ranks #55 at $1500, $499 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. 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 Monoprice Monolith M-15 V2 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 M-15 V2 Reaction Audio PV-15X
Price$1,500$1999 Discontinued
Ranked#55 of 97 in Large Powered Home Subwoofers (Over 75 lbs)#16 of 97 in Large Powered Home Subwoofers (Over 75 lbs)
Enclosureported, frontported, rear
Output SPL at 12.5 Hz91.0 dB-
Output SPL at 15 Hz106.3 dB105.3 dB
Output SPL at 20 Hz112.6 dB111.3 dB
Output SPL at 25 Hz116.6 dB116.1 dB
Output SPL at 31.5 Hz119.5 dB119.8 dB
Output SPL at 40 Hz120.9 dB125.3 dB
Output SPL at 50 Hz120.6 dB126.8 dB
Output SPL at 63 Hz120.0 dB126.1 dB
Output SPL at 80 Hz118.7 dB126.5 dB
Output SPL at 100 Hz120.1 dB126.4 dB
Output SPL at 125 Hz120.2 dB126.1 dB
CEA-2010-A Average (40-80Hz)120.0 dB126.2 dB
Dimensions28.7"H x 17.7"W x 26.8"D (729.0 x 449.6 x 680.7 mm)18.0"H x 22.0"W x 29.0"D (457.2 x 558.8 x 736.6 mm)
Weight132.9 lbs / 60.3 kg149.9 lbs / 68 kg
Warranty5-
Cabinet Colorblack-
CountryUnited States-
Measurement SourceManufacturerData-bass
Drivers15" (381mm) driver15" (381mm) driver
Discontinued-Yes

The Two Speakers In Full

Monoprice Monolith M-15 V2: $1,500 Amazon

Monoprice Monolith M-15 V2 ranking card

Notes: Product # 42851

CEA-2010-A Average (40-80Hz)120.0 dB
Cabinet Colorblack
CountryUnited States
Dimensions28.7"H x 17.7"W x 26.8"D (729.0 x 449.6 x 680.7 mm)
Drivers15" (381mm) driver
Enclosureported, front
Measurement SourceManufacturer
Output SPL at 12.5 Hz91.0 dB
Output SPL at 15 Hz106.3 dB
Output SPL at 20 Hz112.6 dB
Output SPL at 25 Hz116.6 dB
Output SPL at 31.5 Hz119.5 dB
Output SPL at 40 Hz120.9 dB
Output SPL at 50 Hz120.6 dB
Output SPL at 63 Hz120.0 dB
Output SPL at 80 Hz118.7 dB
Output SPL at 100 Hz120.1 dB
Output SPL at 125 Hz120.2 dB
Warranty5
Weight132.9 lbs / 60.3 kg
Check current price at Amazon ($1,500) →

Reaction Audio PV-15X: $1999 Discontinued

Reaction Audio PV-15X ranking card

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
Dimensions18.0"H x 22.0"W x 29.0"D (457.2 x 558.8 x 736.6 mm)
DiscontinuedYes
Drivers15" (381mm) driver
Enclosureported, rear
Measurement SourceData-bass
Output SPL at 15 Hz105.3 dB
Output SPL at 20 Hz111.3 dB
Output SPL at 25 Hz116.1 dB
Output SPL at 31.5 Hz119.8 dB
Output SPL at 40 Hz125.3 dB
Output SPL at 50 Hz126.8 dB
Output SPL at 63 Hz126.1 dB
Output SPL at 80 Hz126.5 dB
Output SPL at 100 Hz126.4 dB
Output SPL at 125 Hz126.1 dB
Weight149.9 lbs / 68 kg

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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.