Short answer: the Power Sound Audio (PSA) TRIAX for the higher ranking, the Rythmik F18 for the lower price. The Power Sound Audio (PSA) TRIAX ranks #3 of 97 subwoofers at $7995. The Rythmik F18 ranks #60 at $1850, $6145 cheaper.
Buy the Power Sound Audio (PSA) TRIAX if the ranking matters more than the price. Buy the Rythmik F18 if the price matters more than the ranking.
Specifications Side By Side
| Power Sound Audio (PSA) TRIAX | Rythmik F18 | |
|---|---|---|
| Price | $7995 | $1,850 |
| Ranked | #3 of 97 in Large Powered Home Subwoofers (Over 75 lbs) | #60 of 97 in Large Powered Home Subwoofers (Over 75 lbs) |
| Enclosure | sealed | sealed |
| Output SPL at 20 Hz | 119.8 dB | 106.2 dB |
| Output SPL at 25 Hz | 119.8 dB | 110.9 dB |
| Output SPL at 31.5 Hz | 119.8 dB | 114.3 dB |
| Output SPL at 40 Hz | 130.9 dB | 117.1 dB |
| Output SPL at 50 Hz | 130.9 dB | 119.1 dB |
| Output SPL at 63 Hz | 130.9 dB | 120.5 dB |
| CEA-2010-A Average (40-80Hz) | 130.9 dB (avg of 3/4 bands) | 119.5 dB |
| Dimensions | 23.5"H x 31.0"W x 27.5"D (596.9 x 787.4 x 698.5 mm) | 20.5"H x 20.5"W x 21.0"D (520.7 x 520.7 x 533.4 mm) |
| Weight | 229.9 lbs / 104.3 kg | 115.1 lbs / 52.2 kg |
| Warranty | 5 | 5/3 |
| Country | United States | United States |
| Measurement Source | Manufacturer | Data-bass |
| Drivers | 3x 15" (381mm) driver | 18" (457mm) driver |
| Output SPL at 10 Hz | - | 93.7 dB |
| Output SPL at 12.5 Hz | - | 97.4 dB |
| Output SPL at 15 Hz | - | 102.0 dB |
| Output SPL at 80 Hz | - | 121.2 dB |
| Output SPL at 100 Hz | - | 121.4 dB |
| Output SPL at 125 Hz | - | 121.4 dB |
| Cabinet Color | - | black |
The Two Speakers In Full
Power Sound Audio (PSA) TRIAX: $7995
| CEA-2010-A Average (40-80Hz) | 130.9 dB (avg of 3/4 bands) |
|---|---|
| Country | United States |
| Dimensions | 23.5"H x 31.0"W x 27.5"D (596.9 x 787.4 x 698.5 mm) |
| Drivers | 3x 15" (381mm) driver |
| Enclosure | sealed |
| Measurement Source | Manufacturer |
| Output SPL at 20 Hz | 119.8 dB |
| Output SPL at 25 Hz | 119.8 dB |
| Output SPL at 31.5 Hz | 119.8 dB |
| Output SPL at 40 Hz | 130.9 dB |
| Output SPL at 50 Hz | 130.9 dB |
| Output SPL at 63 Hz | 130.9 dB |
| Warranty | 5 |
| Weight | 229.9 lbs / 104.3 kg |
- Head-to-Head Comparisons
- Power Sound Audio (PSA) TRIAX vs JTR Speakers Captivator 4000ULF
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- Power Sound Audio (PSA) TRIAX vs JTR Speakers Captivator S2
- Power Sound Audio (PSA) TRIAX vs Monoprice Monolith 16 THX Ultra
- Power Sound Audio (PSA) TRIAX vs Reaction Audio PV-15X
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- See all 14 comparisons
- Links
Rythmik F18: $1,850
| CEA-2010-A Average (40-80Hz) | 119.5 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 20.5"H x 20.5"W x 21.0"D (520.7 x 520.7 x 533.4 mm) |
| Drivers | 18" (457mm) driver |
| Enclosure | sealed |
| Measurement Source | Data-bass |
| Output SPL at 10 Hz | 93.7 dB |
| Output SPL at 12.5 Hz | 97.4 dB |
| Output SPL at 15 Hz | 102.0 dB |
| Output SPL at 20 Hz | 106.2 dB |
| Output SPL at 25 Hz | 110.9 dB |
| Output SPL at 31.5 Hz | 114.3 dB |
| Output SPL at 40 Hz | 117.1 dB |
| Output SPL at 50 Hz | 119.1 dB |
| Output SPL at 63 Hz | 120.5 dB |
| Output SPL at 80 Hz | 121.2 dB |
| Output SPL at 100 Hz | 121.4 dB |
| Output SPL at 125 Hz | 121.4 dB |
| Warranty | 5/3 |
| Weight | 115.1 lbs / 52.2 kg |
- Head-to-Head Comparisons
- Rythmik F18 vs Monoprice Monolith M15-S
- Rythmik F18 vs Monoprice Monolith M-15 V2
- Rythmik F18 vs SVS PB-4000
- Rythmik F18 vs HSU Research VTF-3 MK5 HP
- Rythmik F18 vs HSU Research VTF-15H MK2
- Rythmik F18 vs Rythmik FV15HP
- Rythmik F18 vs Monoprice Monolith M-215
- Rythmik F18 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.