Short answer: the Monoprice Monolith 16 THX Ultra on value, the JTR Orbit Shifter PRO on outright output. The Orbit Shifter PRO’s dual 18-inch horn-loaded drivers deliver a class-leading 141.3dB CEA-2010-A average, well beyond any other subwoofer tested, but it costs $4,499 and weighs 185.2 lbs (84 kg) with a dedicated amplifier. The Monolith 16 reaches 126.5dB at a fraction of the price, though at 172 lbs (78 kg) with ported room interaction.
Buy the JTR Speakers Orbit Shifter PRO. It is rated higher for sound quality and still sold new, while the Monoprice Monolith 16 THX Ultra is discontinued.
Still deciding? The full Subwoofers rankings cover every ranked option.
Prices on this page were last checked November 7, 2026 at 7:34 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
| JTR Speakers Orbit Shifter PRO | Monoprice Monolith 16 THX Ultra | |
|---|---|---|
| Price | $4,499 each | $2,300 Discontinued |
| Ranked | #1 of 143 in Large Home Subwoofers (Over 75 lbs) | #19 of 143 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | horn | ported, front |
| Output SPL at 15 Hz | 95.7 dB | 107.3 dB |
| Output SPL at 20 Hz | 101.9 dB | 118.4 dB |
| Output SPL at 25 Hz | 114.9 dB | 123.3 dB |
| Output SPL at 31.5 Hz | 128.2 dB | 125.1 dB |
| Output SPL at 40 Hz | 136.0 dB | 126.3 dB |
| Output SPL at 50 Hz | 141.0 dB | 126.5 dB |
| Output SPL at 63 Hz | 144.0 dB | 126.6 dB |
| Output SPL at 80 Hz | 144.2 dB | 126.8 dB |
| Output SPL at 100 Hz | 143.4 dB | 127.2 dB |
| Output SPL at 125 Hz | 140.1 dB | 127.6 dB |
| CEA-2010-A Average (40-80Hz) | 141.3 dB | 126.5 dB |
| Dimensions | 45”H x 22.5”W x 32”D (1143.0 x 571.5 x 812.8 mm) | 25.6”H x 22”W x 28.1”D (650.2 x 558.8 x 713.7 mm) |
| Weight | 185 lbs (83.9 kg) | 171.5 lbs (77.8 kg) |
| Warranty | 5 | 5 |
| Cabinet Color | black | black |
| Country | United States | United States |
| Measurement Source | Data-bass | Audioholics |
| Drivers | 18” (457mm) driver | 16” (406mm) driver |
| Inputs | XLR, RCA | XLR, RCA, XLR out |
| 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 |
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