Short answer: the SVS PB-4000 for the higher ranking, the Monoprice Monolith M15-S for the lower price. The SVS PB-4000 ranks #53 of 97 subwoofers at $2158.97. The Monoprice Monolith M15-S ranks #62 at $999, $1159.97 cheaper.
Buy the Monoprice Monolith M15-S if the price matters more than the ranking. Buy the SVS PB-4000 if the ranking matters more than the price.
Specifications Side By Side
| Monoprice Monolith M15-S | SVS PB-4000 | |
|---|---|---|
| Price | $999 | $2,158.97 |
| Ranked | #62 of 97 in Large Powered Home Subwoofers (Over 75 lbs) | #53 of 97 in Large Powered Home Subwoofers (Over 75 lbs) |
| Enclosure | sealed | ported, front |
| Output SPL at 15 Hz | 100.1 dB | 102.1 dB |
| Output SPL at 20 Hz | 105.6 dB | 115.3 dB |
| Output SPL at 25 Hz | 111.2 dB | 116.3 dB |
| Output SPL at 31.5 Hz | 115.2 dB | 117.8 dB |
| Output SPL at 40 Hz | 118.4 dB | 119.8 dB |
| Output SPL at 50 Hz | 119.3 dB | 121.7 dB |
| Output SPL at 63 Hz | 119.6 dB | 120.7 dB |
| Output SPL at 80 Hz | 118.9 dB | 119.2 dB |
| Output SPL at 100 Hz | 119.1 dB | 118.1 dB |
| Output SPL at 125 Hz | 118.9 dB | 117.5 dB |
| CEA-2010-A Average (40-80Hz) | 119.0 dB | 120.3 dB |
| Dimensions | 23.5"H x 16.7"W x 19.7"D (596.9 x 424.2 x 500.4 mm) | 23.4"H x 20.5"W x 27.7"D (594.4 x 520.7 x 703.6 mm) |
| Warranty | 5 | 5 |
| Country | United States | United States |
| Measurement Source | Manufacturer | Audioholics |
| Weight | 80 lbs / 36.3 kg | 153.2 lbs / 69.5 kg |
| Drivers | 15" (381mm) driver | 13.5" (343mm) driver with ported design |
| Cabinet Color | - | black |
The Two Speakers In Full
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
- Monoprice Monolith M15-S vs Rythmik F18
- Monoprice Monolith M15-S vs Monoprice Monolith M-15 V2
- Monoprice Monolith M15-S vs HSU Research VTF-3 MK5 HP
- Monoprice Monolith M15-S vs HSU Research VTF-15H MK2
- Monoprice Monolith M15-S vs Rythmik FV15HP
- Monoprice Monolith M15-S vs Monoprice Monolith M-215
- Monoprice Monolith M15-S vs Reaction Audio PV-15X
- Monoprice Monolith M15-S vs Monoprice Monolith 16 THX Ultra
- See all 15 comparisons
- Links
SVS PB-4000: $2,158.97 Amazon
| CEA-2010-A Average (40-80Hz) | 120.3 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 23.4"H x 20.5"W x 27.7"D (594.4 x 520.7 x 703.6 mm) |
| Drivers | 13.5" (343mm) driver with ported design |
| Enclosure | ported, front |
| Measurement Source | Audioholics |
| Output SPL at 15 Hz | 102.1 dB |
| Output SPL at 20 Hz | 115.3 dB |
| Output SPL at 25 Hz | 116.3 dB |
| Output SPL at 31.5 Hz | 117.8 dB |
| Output SPL at 40 Hz | 119.8 dB |
| Output SPL at 50 Hz | 121.7 dB |
| Output SPL at 63 Hz | 120.7 dB |
| Output SPL at 80 Hz | 119.2 dB |
| Output SPL at 100 Hz | 118.1 dB |
| Output SPL at 125 Hz | 117.5 dB |
| Warranty | 5 |
| Weight | 153.2 lbs / 69.5 kg |
- Head-to-Head Comparisons
- SVS PB-4000 vs Monoprice Monolith M-15 V2
- SVS PB-4000 vs Rythmik F18
- SVS PB-4000 vs HSU Research VTF-3 MK5 HP
- SVS PB-4000 vs HSU Research VTF-15H MK2
- SVS PB-4000 vs Rythmik FV15HP
- SVS PB-4000 vs Monoprice Monolith M-215
- SVS PB-4000 vs Reaction Audio PV-15X
- SVS PB-4000 vs Monoprice Monolith 16 THX Ultra
- See all 13 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.