Short answer: the Emotiva X-Ref 12 ranks #91 of 137 subwoofers at $999; the Monoprice Monolith M15-S ranks #62 at $999. Close enough in price that the ranking gap is the deciding factor.
What the Emotiva X-Ref 12 gets right: 600W sealed 12-inch with smooth linear response and 2-band parametric EQ.
Buy the Emotiva X-Ref 12 if the price matters more than the ranking. Buy the Monoprice Monolith M15-S if the ranking matters more than the price.
Specifications Side By Side
| Emotiva X-Ref 12 | Monoprice Monolith M15-S | |
|---|---|---|
| Price | $999 | $999 |
| Ranked | #91 of 137 in Medium Powered Home Subwoofers (30-75 lbs) | #62 of 97 in Large Powered Home Subwoofers (Over 75 lbs) |
| Enclosure | sealed | sealed |
| Output SPL at 20 Hz | 84.0 dB | 105.6 dB |
| Output SPL at 25 Hz | 92.5 dB | 111.2 dB |
| Output SPL at 31.5 Hz | 102.1 dB | 115.2 dB |
| Output SPL at 40 Hz | 106.5 dB | 118.4 dB |
| Output SPL at 50 Hz | 110.6 dB | 119.3 dB |
| Output SPL at 63 Hz | 111.5 dB | 119.6 dB |
| Output SPL at 80 Hz | 110.7 dB | 118.9 dB |
| Output SPL at 100 Hz | 109.3 dB | 119.1 dB |
| Output SPL at 125 Hz | 108.1 dB | 118.9 dB |
| CEA-2010-A Average (40-80Hz) | 109.8 dB | 119.0 dB |
| Dimensions | 15.62"H x 14.62"W x 15.5"D (396.7 x 371.3 x 393.7 mm) | 23.5"H x 16.7"W x 19.7"D (596.9 x 424.2 x 500.4 mm) |
| Warranty | 5 | 5 |
| Country | United States | United States |
| Measurement Source | Audioholics | Manufacturer |
| Weight | 44.1 lbs / 20.0 kg | 80 lbs / 36.3 kg |
| Power Output (Watts) | 600W RMS | - |
| Frequency Response | 20-200Hz | - |
| Drivers | 12" (305mm) driver | 15" (381mm) driver |
| Output SPL at 15 Hz | - | 100.1 dB |
The Two Speakers In Full
Emotiva X-Ref 12: $999
Pros: 600W sealed 12-inch with smooth linear response and 2-band parametric EQ. Most dynamic subwoofer in sub-$800 market with perfect bass quality. Upscale features (DSP, EQ, LCD screen) at mid-range price.
| CEA-2010-A Average (40-80Hz) | 109.8 dB |
|---|---|
| Country | United States |
| Dimensions | 15.62"H x 14.62"W x 15.5"D (396.7 x 371.3 x 393.7 mm) |
| Drivers | 12" (305mm) driver |
| Enclosure | sealed |
| Frequency Response | 20-200Hz |
| Measurement Source | Audioholics |
| Output SPL at 20 Hz | 84.0 dB |
| Output SPL at 25 Hz | 92.5 dB |
| Output SPL at 31.5 Hz | 102.1 dB |
| Output SPL at 40 Hz | 106.5 dB |
| Output SPL at 50 Hz | 110.6 dB |
| Output SPL at 63 Hz | 111.5 dB |
| Output SPL at 80 Hz | 110.7 dB |
| Output SPL at 100 Hz | 109.3 dB |
| Output SPL at 125 Hz | 108.1 dB |
| Power Output (Watts) | 600W RMS |
| Warranty | 5 |
| Weight | 44.1 lbs / 20.0 kg |
- Head-to-Head Comparisons
- Links
Monoprice Monolith M15-S: $999
Notes: Product # 35141
| CEA-2010-A Average (40-80Hz) | 119.0 dB |
|---|---|
| Country | United States |
| Dimensions | 23.5"H x 16.7"W x 19.7"D (596.9 x 424.2 x 500.4 mm) |
| Drivers | 15" (381mm) driver |
| Enclosure | sealed |
| Measurement Source | Manufacturer |
| Output SPL at 15 Hz | 100.1 dB |
| Output SPL at 20 Hz | 105.6 dB |
| Output SPL at 25 Hz | 111.2 dB |
| Output SPL at 31.5 Hz | 115.2 dB |
| Output SPL at 40 Hz | 118.4 dB |
| Output SPL at 50 Hz | 119.3 dB |
| Output SPL at 63 Hz | 119.6 dB |
| Output SPL at 80 Hz | 118.9 dB |
| Output SPL at 100 Hz | 119.1 dB |
| Output SPL at 125 Hz | 118.9 dB |
| Warranty | 5 |
| Weight | 80 lbs / 36.3 kg |
- Head-to-Head Comparisons
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- See all 15 comparisons
- Links
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Product prices and availability were last checked August 9, 2026 at 6:57 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.