The Monoprice Monolith M-212 is rated 4.2/5 for sound quality, #68 of 143 Large Home Subwoofers (Over 75 lbs). See all Subwoofers rankings for every top pick.
Prices on this page were last checked October 29, 2026 at 4:42 PM 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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Brand: Monoprice
#68 Monoprice Monolith M-212: $1,620 Discontinued eBay
Same family: the Monoprice Monolith M-210 (smaller subwoofer, ranked lower, rated 3.9/5) and the Monoprice Monolith M-215 (larger subwoofer, ranked higher, rated 4.4/5).
Pros: A tall dual 12 inch ported subwoofer with deep, powerful bass for large rooms at a good price used. Published CEA-2010 specifications list 110.3 dB at 20 Hz and 120.4 dB through 40-80 Hz. The ported, front enclosure with 2x 12” (305mm) drivers has the headroom for demanding film bass in a large room.
Cons: The 924.6H x 449.6W x 599.4D mm cabinet and 79.0 kg mass make this a serious placement and moving commitment. Ported output does not solve room modes, so careful placement and calibration remain essential. Discontinued.
Notes: Product # 38544
Is the Monoprice Monolith M-212 right for you?
Skip it if
- you need to move it often (79 kg each).
- you want to buy it new: it is discontinued.
| Released | Mar 2022 (4 years ago) |
|---|---|
| CEA-2010-A Average (40-80Hz) | 120.4 dB |
| Cabinet Color | black |
| Country | United States |
| Dimensions | 36.4”H x 17.7”W x 23.6”D (924.6 x 449.6 x 599.4 mm) |
| Drivers | 2x 12” (305mm) drivers |
| Enclosure | ported, front |
| Measurement Source | Manufacturer |
| Output SPL at 15 Hz | 104.2 dB |
| Output SPL at 20 Hz | 110.3 dB |
| Output SPL at 25 Hz | 114.5 dB |
| Output SPL at 31.5 Hz | 116.9 dB |
| Output SPL at 40 Hz | 119.7 dB |
| Output SPL at 50 Hz | 119.8 dB |
| Output SPL at 63 Hz | 120.3 dB |
| Output SPL at 80 Hz | 121.7 dB |
| Output SPL at 100 Hz | 121.5 dB |
| Output SPL at 125 Hz | 122.3 dB |
| Warranty | 5 |
| Weight | 174.2 lbs (79.0 kg) |
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- Reviews, Comparisons and Sound Samples
- These figures are manufacturer-specified rather than independently measured.
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