Monoprice Monolith M-215 vs Rythmik FV15HP

Last updated: August 9, 2026

Short answer: the Monoprice Monolith M-215 for the higher ranking, the Rythmik FV15HP for the lower price. The Monoprice Monolith M-215 ranks #18 of 97 subwoofers at $2500. The Rythmik FV15HP ranks #39 at $1770, $730 cheaper.

On the Rythmik FV15HP side: 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-215 if the ranking matters more than the price. Buy the Rythmik FV15HP if the price matters more than the ranking.

Specifications Side By Side

Monoprice Monolith M-215 Rythmik FV15HP
Price$2,500$1,770
Ranked#18 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 Hz103.9 dB92.8 dB
Output SPL at 15 Hz113.1 dB105.1 dB
Output SPL at 20 Hz118.9 dB111.1 dB
Output SPL at 25 Hz122.6 dB116.1 dB
Output SPL at 31.5 Hz125.2 dB120.0 dB
Output SPL at 40 Hz126.4 dB122.5 dB
Output SPL at 50 Hz126.1 dB122.1 dB
Output SPL at 63 Hz125.6 dB121.8 dB
Output SPL at 80 Hz125.6 dB121.4 dB
Output SPL at 100 Hz125.7 dB121.2 dB
Output SPL at 125 Hz126.3 dB121.1 dB
CEA-2010-A Average (40-80Hz)125.9 dB122.0 dB
Dimensions42.3"H x 20.0"W x 27.6"D (1074.4 x 508.0 x 701.0 mm)24.5"H x 18.25"W x 24.25"D (622.3 x 463.5 x 615.9 mm)
Weight216.1 lbs / 98.0 kg115.1 lbs / 52.2 kg
Warranty55/3
Cabinet Colorblackblack, white
CountryUnited StatesUnited States
Measurement SourceBrent ButterworthAudioholics
Drivers2x 15" (381mm) drivers15" (381mm) driver

The Two Speakers In Full

Monoprice Monolith M-215: $2,500

Monoprice Monolith M-215 ranking card

Notes: Product # 38543

CEA-2010-A Average (40-80Hz)125.9 dB
Cabinet Colorblack
CountryUnited States
Dimensions42.3"H x 20.0"W x 27.6"D (1074.4 x 508.0 x 701.0 mm)
Drivers2x 15" (381mm) drivers
Enclosureported, front
Measurement SourceBrent Butterworth
Output SPL at 12.5 Hz103.9 dB
Output SPL at 15 Hz113.1 dB
Output SPL at 20 Hz118.9 dB
Output SPL at 25 Hz122.6 dB
Output SPL at 31.5 Hz125.2 dB
Output SPL at 40 Hz126.4 dB
Output SPL at 50 Hz126.1 dB
Output SPL at 63 Hz125.6 dB
Output SPL at 80 Hz125.6 dB
Output SPL at 100 Hz125.7 dB
Output SPL at 125 Hz126.3 dB
Warranty5
Weight216.1 lbs / 98.0 kg

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.