The Monoprice Monolith 13 THX Ultra ranks #47 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.
#47 Monoprice Monolith 13 THX Ultra: $1,700
Notes: Product # 41496
How it compares: Just above it: SVS PB16-Ultra - $1200 more. Just below it: Arendal 1723 Subwoofer 2V - $1400 more.
| CEA-2010-A Average (40-80Hz) | 121.1 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 23.8"H x 20.3"W x 29.1"D (604.5 x 515.6 x 739.1 mm) |
| Driver | 13" (330mm) driver |
| Driver(s) | (1) 13 inch |
| Enclosure | ported, front |
| Measurement Source | Audioholics |
| Output SPL at 12.5 Hz | 94.0 dB |
| Output SPL at 15 Hz | 109.1 dB |
| Output SPL at 20 Hz | 115.0 dB |
| Output SPL at 25 Hz | 118.0 dB |
| Output SPL at 31.5 Hz | 119.5 dB |
| Output SPL at 40 Hz | 120.3 dB |
| Output SPL at 50 Hz | 120.7 dB |
| Output SPL at 63 Hz | 121.4 dB |
| Output SPL at 80 Hz | 122.1 dB |
| Output SPL at 100 Hz | 122.7 dB |
| Output SPL at 125 Hz | 123.8 dB |
| Warranty | 5 |
| Weight | 153.2 lbs / 69.5 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.