Short answer: the Perlisten Audio D215s, if you are buying new. The Monoprice Monolith 16 THX Ultra ranks higher than it (#19 vs #44 of 143 subwoofers, 4.4/5 vs 4.2/5) but is discontinued, so only consider it used; the Perlisten Audio D215s is still sold new at $9,000.
What the Monoprice Monolith 16 THX Ultra does well: A THX Ultra certified 16 inch ported subwoofer with huge output for far less money than most rivals, now worth finding used. The tradeoff: Heavy at 172 lbs (78 kg) and ported design can interact with room acoustics.
Why pick the Perlisten Audio D215s: A sealed dual 15 inch subwoofer with powerful deep bass for big home theaters and both balanced and RCA inputs. The catch: The 805.2H x 500.4W x 650.2D mm cabinet and 202.4 lbs (91.8 kg) mass make this a serious placement and moving commitment.
Buy the Perlisten Audio D215s if you want one new; the Monoprice Monolith 16 THX Ultra is discontinued, so only look for it used.
Looking for alternatives? See the complete Subwoofers rankings.
A THX Ultra certified 16 inch ported subwoofer with huge output for far less money than most rivals, now worth finding used.
A sealed dual 15 inch subwoofer with powerful deep bass for big home theaters and both balanced and RCA inputs.
Prices on this page were last checked October 31, 2026 at 7:11 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.
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Specifications Side By Side
| Monoprice Monolith 16 THX Ultra | Perlisten Audio D215s | |
|---|---|---|
| Price | $2,300 Discontinued | $9,000 |
| Ranked | #19 of 143 in Large Home Subwoofers (Over 75 lbs) | #44 of 143 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | ported, front | sealed |
| Output SPL at 15 Hz | 107.3 dB | 104.3 dB |
| Output SPL at 20 Hz | 118.4 dB | 109.2 dB |
| Output SPL at 25 Hz | 123.3 dB | 113.3 dB |
| Output SPL at 31.5 Hz | 125.1 dB | 117.2 dB |
| Output SPL at 40 Hz | 126.3 dB | 120.8 dB |
| Output SPL at 50 Hz | 126.5 dB | 122.8 dB |
| Output SPL at 63 Hz | 126.6 dB | 124.0 dB |
| Output SPL at 80 Hz | 126.8 dB | 125.0 dB |
| Output SPL at 100 Hz | 127.2 dB | 125.6 dB |
| Output SPL at 125 Hz | 127.6 dB | 126.6 dB |
| CEA-2010-A Average (40-80Hz) | 126.5 dB | 123.2 dB |
| Dimensions | 25.6”H x 22”W x 28.1”D (650.2 x 558.8 x 713.7 mm) | 31.7”H x 19.7”W x 25.6”D (805.2 x 500.4 x 650.2 mm) |
| Weight | 171.5 lbs (77.8 kg) | 202.4 lbs (91.8 kg) |
| Warranty | 5 | 5 |
| Cabinet Color | black | black, custom |
| Country | United States | United States |
| Measurement Source | Audioholics | Audioholics |
| Drivers | 16” (406mm) driver | 2x 15” (381mm) drivers |
| Inputs | XLR, RCA, XLR out | XLR (2, balanced), RCA (2, unbalanced) |
| XLR Input | Yes | Yes |
| RCA Input | Yes | Yes |
| TRS Input | No | No |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | No | No |
| Output SPL at 10 Hz | - | 93.0 dB |
| Output SPL at 12.5 Hz | - | 98.8 dB |
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