Monoprice Monolith M-15 V2 vs Rythmik FV15HP

Last updated: August 9, 2026

Short answer: the Rythmik FV15HP for the higher ranking, the Monoprice Monolith M-15 V2 for the lower price. The Rythmik FV15HP ranks #39 of 97 subwoofers at $1770. The Monoprice Monolith M-15 V2 ranks #55 at $1500, $270 cheaper.

What the Rythmik FV15HP gets right: 15-inch ported driver reaches 122.0dB CEA-2010-A average, matching the output of subwoofers costing significantly more. The catch: Premium price ($1,770), ported design room gain dependency, and mid-to-large 52 kg footprint.

Buy the Monoprice Monolith M-15 V2 if the price matters more than the ranking. Buy the Rythmik FV15HP if the ranking matters more than the price.

Specifications Side By Side

Monoprice Monolith M-15 V2 Rythmik FV15HP
Price$1,500$1,770
Ranked#55 of 97 in Large Powered Home Subwoofers (Over 75 lbs)#39 of 97 in Large Powered Home Subwoofers (Over 75 lbs)
Enclosureported, frontported, front
Output SPL at 12.5 Hz91.0 dB92.8 dB
Output SPL at 15 Hz106.3 dB105.1 dB
Output SPL at 20 Hz112.6 dB111.1 dB
Output SPL at 25 Hz116.6 dB116.1 dB
Output SPL at 31.5 Hz119.5 dB120.0 dB
Output SPL at 40 Hz120.9 dB122.5 dB
Output SPL at 50 Hz120.6 dB122.1 dB
Output SPL at 63 Hz120.0 dB121.8 dB
Output SPL at 80 Hz118.7 dB121.4 dB
Output SPL at 100 Hz120.1 dB121.2 dB
Output SPL at 125 Hz120.2 dB121.1 dB
CEA-2010-A Average (40-80Hz)120.0 dB122.0 dB
Dimensions28.7"H x 17.7"W x 26.8"D (729.0 x 449.6 x 680.7 mm)24.5"H x 18.25"W x 24.25"D (622.3 x 463.5 x 615.9 mm)
Weight132.9 lbs / 60.3 kg115.1 lbs / 52.2 kg
Warranty55/3
Cabinet Colorblackblack, white
CountryUnited StatesUnited States
Measurement SourceManufacturerAudioholics
Drivers15" (381mm) driver15" (381mm) driver

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) →

Rythmik FV15HP: $1,770

Rythmik FV15HP ranking card

Pros: 15-inch ported driver reaches 122.0dB CEA-2010-A average, matching the output of subwoofers costing significantly more.

Cons: Premium price ($1,770), ported design room gain dependency, and mid-to-large 52 kg footprint.

CEA-2010-A Average (40-80Hz)122.0 dB
Cabinet Colorblack, white
CountryUnited States
Dimensions24.5"H x 18.25"W x 24.25"D (622.3 x 463.5 x 615.9 mm)
Drivers15" (381mm) driver
Enclosureported, front
Measurement SourceAudioholics
Output SPL at 12.5 Hz92.8 dB
Output SPL at 15 Hz105.1 dB
Output SPL at 20 Hz111.1 dB
Output SPL at 25 Hz116.1 dB
Output SPL at 31.5 Hz120.0 dB
Output SPL at 40 Hz122.5 dB
Output SPL at 50 Hz122.1 dB
Output SPL at 63 Hz121.8 dB
Output SPL at 80 Hz121.4 dB
Output SPL at 100 Hz121.2 dB
Output SPL at 125 Hz121.1 dB
Warranty5/3
Weight115.1 lbs / 52.2 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.