Rythmik FV25HP vs Monoprice Monolith M-215

Last updated: September 16, 2026

Short answer: the Rythmik FV25HP. It ranks #22 of 110 subwoofers by sound quality at $2499; the Monoprice Monolith M-215 ranks #23 and costs $2999.99, so there is little reason to consider the other one.

Rythmik FV25HP vs Monoprice Monolith M-215

What the Rythmik FV25HP offers: Independent CEA-2010 testing records 116.6 dB at 20 Hz and 126.2 dB through 40-80 Hz. The ported, front enclosure with 2x 15” (381mm) driver has the headroom for demanding film bass in a large room. Watch for: The 1054.1H x 533.4W x 558.8D mm cabinet and 95.3 kg mass make this a serious placement and moving commitment. Ported output does not solve room modes, so careful placement and calibration remain essential.

What the Monoprice Monolith M-215 offers: Independent CEA-2010 testing records 118.9 dB at 20 Hz and 125.9 dB through 40-80 Hz. The ported, front enclosure with 2x 15” (381mm) drivers has the headroom for demanding film bass in a large room. Watch for: The 1074.4H x 508.0W x 701.0D mm cabinet and 98.0 kg mass make this a serious placement and moving commitment. Ported output does not solve room modes, so careful placement and calibration remain essential.

Buy the Rythmik FV25HP. It ranks higher for sound quality than the Monoprice Monolith M-215 and costs less, which settles it without a real tradeoff to make.

Want more options? Browse the full Subwoofers rankings.

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Specifications Side By Side

Rythmik FV25HP Monoprice Monolith M-215
Price$2499$2999.99
Ranked#22 of 110 in Large Home Subwoofers (Over 75 lbs)#23 of 110 in Large Home Subwoofers (Over 75 lbs)
Enclosureported, frontported, front
Output SPL at 10 Hz99.7 dB-
Output SPL at 12.5 Hz108.4 dB103.9 dB
Output SPL at 15 Hz113.2 dB113.1 dB
Output SPL at 20 Hz116.6 dB118.9 dB
Output SPL at 25 Hz119.1 dB122.6 dB
Output SPL at 31.5 Hz122.4 dB125.2 dB
Output SPL at 40 Hz124.7 dB126.4 dB
Output SPL at 50 Hz126.1 dB126.1 dB
Output SPL at 63 Hz126.7 dB125.6 dB
Output SPL at 80 Hz127.3 dB125.6 dB
Output SPL at 100 Hz127.9 dB125.7 dB
Output SPL at 125 Hz127.8 dB126.3 dB
CEA-2010-A Average (40-80Hz)126.2 dB125.9 dB
Dimensions41.5"H x 21"W x 22"D (1054.1 x 533.4 x 558.8 mm)42.3"H x 20"W x 27.6"D (1074.4 x 508.0 x 701.0 mm)
Weight210.1 lbs (95.3 kg)216.1 lbs (98.0 kg)
Warranty5/35
Cabinet Colorblackblack
CountryUnited StatesUnited States
Measurement SourceData-bassBrent Butterworth
Drivers2x 15" (381mm) driver2x 15" (381mm) drivers
Buy the Monoprice Monolith M-215 at Monoprice ($2999.99) →

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Prices on this page were last checked September 16, 2026 at 12:41 AM 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

Rythmik FV25HP: $2499 eBay

Rythmik FV25HP ranking card

Pros: Independent CEA-2010 testing records 116.6 dB at 20 Hz and 126.2 dB through 40-80 Hz. The ported, front enclosure with 2x 15” (381mm) driver has the headroom for demanding film bass in a large room.

Cons: The 1054.1H x 533.4W x 558.8D mm cabinet and 95.3 kg mass make this a serious placement and moving commitment. Ported output does not solve room modes, so careful placement and calibration remain essential.

Full Rythmik FV25HP review and specifications →

CEA-2010-A Average (40-80Hz)126.2 dB
Cabinet Colorblack
CountryUnited States
Dimensions41.5"H x 21"W x 22"D (1054.1 x 533.4 x 558.8 mm)
Drivers2x 15" (381mm) driver
Enclosureported, front
Measurement SourceData-bass
Output SPL at 10 Hz99.7 dB
Output SPL at 12.5 Hz108.4 dB
Output SPL at 15 Hz113.2 dB
Output SPL at 20 Hz116.6 dB
Output SPL at 25 Hz119.1 dB
Output SPL at 31.5 Hz122.4 dB
Output SPL at 40 Hz124.7 dB
Output SPL at 50 Hz126.1 dB
Output SPL at 63 Hz126.7 dB
Output SPL at 80 Hz127.3 dB
Output SPL at 100 Hz127.9 dB
Output SPL at 125 Hz127.8 dB
Warranty5/3
Weight210.1 lbs (95.3 kg)
Search eBay for Rythmik FV25HP →

Monoprice Monolith M-215: $2999.99 Monoprice eBay

Monoprice Monolith M-215 ranking card

Pros: Independent CEA-2010 testing records 118.9 dB at 20 Hz and 125.9 dB through 40-80 Hz. The ported, front enclosure with 2x 15” (381mm) drivers has the headroom for demanding film bass in a large room.

Cons: The 1074.4H x 508.0W x 701.0D mm cabinet and 98.0 kg mass make this a serious placement and moving commitment. Ported output does not solve room modes, so careful placement and calibration remain essential.

Notes: Product # 38543

Full Monoprice Monolith M-215 review and specifications →

CEA-2010-A Average (40-80Hz)125.9 dB
Cabinet Colorblack
CountryUnited States
Dimensions42.3"H x 20"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)
Check current price at Monoprice ($2999.99) →Search eBay for Monoprice Monolith M-215 →