Monoprice Monolith M12-S Review: Ranked #101 of 110

Last updated: September 13, 2026

The Monoprice Monolith M12-S ranks #101 out of 110 total Large Home Subwoofers (Over 75 lbs) for sound quality. See all Subwoofers rankings for every top pick.

Brand: Monoprice

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Monoprice Monolith M12-S - ranked #101 of 110 Large Home Subwoofers (Over 75 lbs) · Editor's rating 3.7/5

#101 Monoprice Monolith M12-S: $599 eBay

Pros: Published CEA-2010 specifications list 100.1 dB at 20 Hz and 112.7 dB through 40-80 Hz. The sealed enclosure with 12” (305mm) driver delivers substantial upper-bass output for movie effects and music.

Cons: Deep-bass output is more limited than the strong 40-80 Hz result suggests, so it is not the right choice when the lowest movie effects are the priority. The 500.4H x 391.2W x 424.2D mm cabinet and 44.7 kg mass still require deliberate placement and calibration.

Notes: Product # 35142

How it compares: Just above it: HSU Research VTF-3 MK3 with Turbocharger - $1000 more. Just below it: Velodyne Acoustics DD-15 - $1896 more.

CEA-2010-A Average (40-80Hz)112.7 dB
CountryUnited States
Dimensions19.7"H x 15.4"W x 16.7"D (500.4 x 391.2 x 424.2 mm)
Drivers12" (305mm) driver
Enclosuresealed
Measurement SourceManufacturer
Output SPL at 15 Hz95.2 dB
Output SPL at 20 Hz100.1 dB
Output SPL at 25 Hz104.0 dB
Output SPL at 31.5 Hz108.0 dB
Output SPL at 40 Hz110.6 dB
Output SPL at 50 Hz112.8 dB
Output SPL at 63 Hz113.7 dB
Output SPL at 80 Hz113.8 dB
Output SPL at 100 Hz113.7 dB
Output SPL at 125 Hz113.7 dB
Warranty5
Weight98.5 lbs (44.7 kg)

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