Short answer: the Monoprice Monolith 16 THX Ultra for the higher ranking, the SVS PB-4000 for the lower price. The Monoprice Monolith 16 THX Ultra ranks #13 of 97 subwoofers at $2300. The SVS PB-4000 ranks #53 at $2158.97, $141.03 cheaper.
On the Monoprice Monolith 16 THX Ultra side: 16-inch ported driver and THX Ultra certification deliver 126.5dB CEA-2010-A average at a fraction of the price of the subwoofers ranked. The catch: Heavy at 78 kg and ported design can interact with room acoustics.
Buy the Monoprice Monolith 16 THX Ultra if the ranking matters more than the price. Buy the SVS PB-4000 if the price matters more than the ranking.
Specifications Side By Side
| Monoprice Monolith 16 THX Ultra | SVS PB-4000 | |
|---|---|---|
| Price | $2,300 | $2,158.97 |
| Ranked | #13 of 97 in Large Powered Home Subwoofers (Over 75 lbs) | #53 of 97 in Large Powered Home Subwoofers (Over 75 lbs) |
| Enclosure | ported, front | ported, front |
| Output SPL at 15 Hz | 107.3 dB | 102.1 dB |
| Output SPL at 20 Hz | 118.4 dB | 115.3 dB |
| Output SPL at 25 Hz | 123.3 dB | 116.3 dB |
| Output SPL at 31.5 Hz | 125.1 dB | 117.8 dB |
| Output SPL at 40 Hz | 126.3 dB | 119.8 dB |
| Output SPL at 50 Hz | 126.5 dB | 121.7 dB |
| Output SPL at 63 Hz | 126.6 dB | 120.7 dB |
| Output SPL at 80 Hz | 126.8 dB | 119.2 dB |
| Output SPL at 100 Hz | 127.2 dB | 118.1 dB |
| Output SPL at 125 Hz | 127.6 dB | 117.5 dB |
| CEA-2010-A Average (40-80Hz) | 126.5 dB | 120.3 dB |
| Dimensions | 25.6"H x 22.0"W x 28.1"D (650.2 x 558.8 x 713.7 mm) | 23.4"H x 20.5"W x 27.7"D (594.4 x 520.7 x 703.6 mm) |
| Weight | 171.5 lbs / 77.8 kg | 153.2 lbs / 69.5 kg |
| Warranty | 5 | 5 |
| Cabinet Color | black | black |
| Country | United States | United States |
| Measurement Source | Audioholics | Audioholics |
| Drivers | 16" (406mm) driver | 13.5" (343mm) driver with ported design |
The Two Speakers In Full
Monoprice Monolith 16 THX Ultra: $2,300
Pros: 16-inch ported driver and THX Ultra certification deliver 126.5dB CEA-2010-A average at a fraction of the price of the subwoofers ranked above it.
Cons: Heavy at 78 kg and ported design can interact with room acoustics.
Notes: Product # 42031
| CEA-2010-A Average (40-80Hz) | 126.5 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 25.6"H x 22.0"W x 28.1"D (650.2 x 558.8 x 713.7 mm) |
| Drivers | 16" (406mm) driver |
| Enclosure | ported, front |
| Measurement Source | Audioholics |
| Output SPL at 15 Hz | 107.3 dB |
| Output SPL at 20 Hz | 118.4 dB |
| Output SPL at 25 Hz | 123.3 dB |
| Output SPL at 31.5 Hz | 125.1 dB |
| Output SPL at 40 Hz | 126.3 dB |
| Output SPL at 50 Hz | 126.5 dB |
| Output SPL at 63 Hz | 126.6 dB |
| Output SPL at 80 Hz | 126.8 dB |
| Output SPL at 100 Hz | 127.2 dB |
| Output SPL at 125 Hz | 127.6 dB |
| Warranty | 5 |
| Weight | 171.5 lbs / 77.8 kg |
- Head-to-Head Comparisons
- Monoprice Monolith 16 THX Ultra vs Harbottle Audio C24 L2
- Monoprice Monolith 16 THX Ultra vs Funk Audio Ultra 21.0LX
- Monoprice Monolith 16 THX Ultra vs Funk Audio Classic 18.0
- Monoprice Monolith 16 THX Ultra vs JTR Speakers Captivator 2400
- Monoprice Monolith 16 THX Ultra vs Reaction Audio PV-15X
- Monoprice Monolith 16 THX Ultra vs Monoprice Monolith M-215
- Monoprice Monolith 16 THX Ultra vs JTR Speakers Captivator S2
- Monoprice Monolith 16 THX Ultra vs JTR Speakers Captivator 4000ULF
- See all 18 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 Monoprice Monolith M15-S
- 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
- 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.