Monoprice Monolith M-215 Review: Rated 4.4/5

Last updated: October 21, 2026

The Monoprice Monolith M-215 is rated 4.4/5 for sound quality, #24 of 143 Large Home Subwoofers (Over 75 lbs). See all Subwoofers rankings for every top pick.

Monoprice Monolith M-215 · Editor's rating 4.4/5, ranked #24 of 143 Large Home Subwoofers (Over 75 lbs)
Check price at Monoprice ($2999.99) →

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Brand: Monoprice

#24 Monoprice Monolith M-215: $2999.99 Monoprice $2999.99 eBay

Same family: the Monoprice Monolith M-210 (smaller subwoofer, ranked lower, rated 3.9/5) and the Monoprice Monolith M-212 (smaller subwoofer, ranked lower, rated 4.2/5).

Pros: A dual 15 inch ported subwoofer with excellent output down to the lowest notes, a strong value for large home theaters. 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

Featured on:
ReleasedOct 2019 (7 years ago)
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)
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