The Monoprice Monolith 12 THX Ultra ranks #83 out of 97 total Large Powered Home Subwoofers (Over 75 lbs) for sound quality. See Top Recommended Speakers By Attribute for all the top speaker suggestions.
#83 Monoprice Monolith 12 THX Ultra: $1499
Notes: Product # 24457
How it compares: Just above it: Arendal 1961 Subwoofer 1V - $299 cheaper. Just below it: Monoprice Monolith M-12 V2 - $599 cheaper.
| CEA-2010-A Average (40-80Hz) | 115.2 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 22.8"H x 16.7"W x 23.6"D (579.1 x 424.2 x 599.4 mm) |
| Driver | 12" (305mm) driver |
| Driver(s) | (1) 12 inch |
| Enclosure | ported, front |
| Measurement Source | ErinsAudioCorner |
| Output SPL at 12.5 Hz | 87.7 dB |
| Output SPL at 15 Hz | 101.2 dB |
| Output SPL at 20 Hz | 108.4 dB |
| Output SPL at 25 Hz | 110.9 dB |
| Output SPL at 31.5 Hz | 113.0 dB |
| Output SPL at 40 Hz | 114.0 dB |
| Output SPL at 50 Hz | 115.0 dB |
| Output SPL at 63 Hz | 116.0 dB |
| Output SPL at 80 Hz | 116.0 dB |
| Output SPL at 100 Hz | 115.0 dB |
| Output SPL at 125 Hz | 114.0 dB |
| Warranty | 5 |
| Weight | 98.5 lbs / 44.7 kg |
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Product prices and availability were last checked July 31, 2026 at 5:30 AM UTC 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.