Short answer: the Monoprice Monolith M-215, if you are buying new. The Power Sound Audio (PSA) TRIAX ranks higher than it (#5 vs #24 of 143 subwoofers, 4.5/5 vs 4.4/5) but is discontinued, so only consider it used; the Monoprice Monolith M-215 is still sold new at $2,999.99.
Buy the Monoprice Monolith M-215 if you want one new; the Power Sound Audio (PSA) TRIAX is discontinued, so only look for it used.
Still deciding? The full Subwoofers rankings cover every ranked option.
Independent CEA-2010 testing records 118.9 dB at 20 Hz and 125.9 dB through 40-80 Hz.
Monoprice $2999.99 eBay
Published CEA-2010 specifications list 119.8 dB at 20 Hz and 130.9 dB (avg of 3/4 bands) through 40-80 Hz.
eBayPrices on this page were last checked October 15, 2026 at 5:41 PM UTC. Product prices and availability are accurate as of that date/time 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Monoprice Monolith M-215 | Power Sound Audio (PSA) TRIAX | |
|---|---|---|
| Price | $2999.99 | $7,995 Discontinued |
| Ranked | #24 of 143 in Large Home Subwoofers (Over 75 lbs) | #5 of 143 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | ported, front | sealed |
| Output SPL at 12.5 Hz | 103.9 dB | - |
| Output SPL at 15 Hz | 113.1 dB | - |
| Output SPL at 20 Hz | 118.9 dB | 119.8 dB |
| Output SPL at 25 Hz | 122.6 dB | 119.8 dB |
| Output SPL at 31.5 Hz | 125.2 dB | 119.8 dB |
| Output SPL at 40 Hz | 126.4 dB | 130.9 dB |
| Output SPL at 50 Hz | 126.1 dB | 130.9 dB |
| Output SPL at 63 Hz | 125.6 dB | 130.9 dB |
| Output SPL at 80 Hz | 125.6 dB | - |
| Output SPL at 100 Hz | 125.7 dB | - |
| Output SPL at 125 Hz | 126.3 dB | - |
| CEA-2010-A Average (40-80Hz) | 125.9 dB | 130.9 dB (avg of 3/4 bands) |
| Dimensions | 42.3”H x 20”W x 27.6”D (1074.4 x 508.0 x 701.0 mm) | 23.5”H x 31”W x 27.5”D (596.9 x 787.4 x 698.5 mm) |
| Weight | 216.1 lbs (98.0 kg) | 229.9 lbs (104.3 kg) |
| Warranty | 5 | 5 |
| Cabinet Color | black | - |
| Country | United States | United States |
| Measurement Source | Brent Butterworth | Manufacturer |
| Drivers | 2x 15” (381mm) drivers | 3x 15” (381mm) driver |
| Inputs | - | XLR (balanced, with loop output) |
| XLR Input | - | Yes |
| RCA Input | - | No |
| TRS Input | - | No |
| Optical Input | - | No |
| Coaxial Input | - | No |
| USB Input | - | No |
| HDMI Input | - | No |
| AES Input | - | No |
| Aux Input | - | No |
Related Speaker Comparisons
More top alternatives to Power Sound Audio (PSA) TRIAX:
- JTR Speakers Orbit Shifter PRO vs Power Sound Audio (PSA) TRIAX
- JTR Speakers Orbit Shifter LFU vs Power Sound Audio (PSA) TRIAX
- JTR Speakers Captivator 4000ULF vs Power Sound Audio (PSA) TRIAX
- JTR Speakers Captivator 215PRO vs Power Sound Audio (PSA) TRIAX
- JTR Speakers Captivator S2 vs Power Sound Audio (PSA) TRIAX