The Monoprice Monolith M12-S is rated 3.7/5 for sound quality, #134 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
#134 Monoprice Monolith M12-S: $599 Discontinued eBay
Same family: the Monoprice Monolith M10-S (smaller subwoofer, rated 3.4/5) and the Monoprice Monolith M15-S (larger subwoofer, ranked higher, rated 4.1/5).
Pros: A low cost sealed 12 inch subwoofer with solid upper bass punch for music and movies, now discontinued. 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. Discontinued.
Notes: Product # 35142
Is the Monoprice Monolith M12-S right for you?
Skip it if
- you need to move it often (45 kg each).
- you want to buy it new: it is discontinued.
| Released | 2019 (7 years ago) |
|---|---|
| CEA-2010-A Average (40-80Hz) | 112.7 dB |
| Country | United States |
| Dimensions | 19.7”H x 15.4”W x 16.7”D (500.4 x 391.2 x 424.2 mm) |
| Drivers | 12” (305mm) driver |
| Enclosure | sealed |
| Measurement Source | Manufacturer |
| Output SPL at 15 Hz | 95.2 dB |
| Output SPL at 20 Hz | 100.1 dB |
| Output SPL at 25 Hz | 104.0 dB |
| Output SPL at 31.5 Hz | 108.0 dB |
| Output SPL at 40 Hz | 110.6 dB |
| Output SPL at 50 Hz | 112.8 dB |
| Output SPL at 63 Hz | 113.7 dB |
| Output SPL at 80 Hz | 113.8 dB |
| Output SPL at 100 Hz | 113.7 dB |
| Output SPL at 125 Hz | 113.7 dB |
| Warranty | 5 |
| Weight | 98.5 lbs (44.7 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- These figures are manufacturer-specified rather than independently measured.
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