Short answer: the Monoprice Monolith M-215. It ranks #24 of 143 subwoofers by sound quality (rated 4.4/5) at $1,499.99 and is still sold new; the Monoprice Monolith M15-S ranks #88 (rated 4.1/5) and is discontinued, so it is only an option used.
Buy the Monoprice Monolith M-215. It is rated higher for sound quality, and the Monoprice Monolith M15-S is discontinued, so it is only available used.
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Specifications Side By Side
| Monoprice Monolith M-215 | Monoprice Monolith M15-S | |
|---|---|---|
| Price | $1,499.99 | $999 Discontinued |
| Ranked | #24 of 143 in Large Home Subwoofers (Over 75 lbs) | #88 of 143 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | ported, front | sealed |
| Output SPL at 12.5 Hz | 103.9 dB | - |
| Output SPL at 15 Hz | 113.1 dB | 100.1 dB |
| Output SPL at 20 Hz | 118.9 dB | 105.6 dB |
| Output SPL at 25 Hz | 122.6 dB | 111.2 dB |
| Output SPL at 31.5 Hz | 125.2 dB | 115.2 dB |
| Output SPL at 40 Hz | 126.4 dB | 118.4 dB |
| Output SPL at 50 Hz | 126.1 dB | 119.3 dB |
| Output SPL at 63 Hz | 125.6 dB | 119.6 dB |
| Output SPL at 80 Hz | 125.6 dB | 118.9 dB |
| Output SPL at 100 Hz | 125.7 dB | 119.1 dB |
| Output SPL at 125 Hz | 126.3 dB | 118.9 dB |
| CEA-2010-A Average (40-80Hz) | 125.9 dB | 119.0 dB |
| Dimensions | 42.3”H x 20”W x 27.6”D (1074.4 x 508.0 x 701.0 mm) | 23.5”H x 16.7”W x 19.7”D (596.9 x 424.2 x 500.4 mm) |
| Weight | 216.1 lbs (98.0 kg) | 80 lbs (36.3 kg) |
| Warranty | 5 | 5 |
| Cabinet Color | black | - |
| Country | United States | United States |
| Measurement Source | Brent Butterworth | Manufacturer |
| Drivers | 2x 15” (381mm) drivers | 15” (381mm) driver |
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