Short answer: the Monoprice Monolith 16 THX Ultra for output, with both needing room gain. The 16-inch ported driver and THX Ultra certification deliver a 126.5dB CEA-2010-A average against the FV15HP’s 122.0dB, though the Monolith is heavy at 78 kg (172 lbs) and its ported design can interact with room acoustics. The Rythmik FV15HP carries a premium price, weighs 52 kg (114.6 lbs) and depends on ported room gain.
Buy the Rythmik FV15HP new; the Monoprice Monolith 16 THX Ultra is no longer sold new, so it only makes sense as a used find.
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Specifications Side By Side
| Monoprice Monolith 16 THX Ultra | Rythmik FV15HP | |
|---|---|---|
| Price | $2,300 Discontinued | $2,127 |
| Ranked | #19 of 143 in Large Home Subwoofers (Over 75 lbs) | #55 of 143 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | ported, front | ported, front |
| Output SPL at 15 Hz | 107.3 dB | 105.1 dB |
| Output SPL at 20 Hz | 118.4 dB | 111.1 dB |
| Output SPL at 25 Hz | 123.3 dB | 116.1 dB |
| Output SPL at 31.5 Hz | 125.1 dB | 120.0 dB |
| Output SPL at 40 Hz | 126.3 dB | 122.5 dB |
| Output SPL at 50 Hz | 126.5 dB | 122.1 dB |
| Output SPL at 63 Hz | 126.6 dB | 121.8 dB |
| Output SPL at 80 Hz | 126.8 dB | 121.4 dB |
| Output SPL at 100 Hz | 127.2 dB | 121.2 dB |
| Output SPL at 125 Hz | 127.6 dB | 121.1 dB |
| CEA-2010-A Average (40-80Hz) | 126.5 dB | 122.0 dB |
| Dimensions | 25.6”H x 22”W x 28.1”D (650.2 x 558.8 x 713.7 mm) | 24.5”H x 18.2”W x 24.2”D (622.3 x 463.5 x 615.9 mm) |
| Weight | 171.5 lbs (77.8 kg) | 115.1 lbs (52.2 kg) |
| Warranty | 5 | 5/3 |
| Cabinet Color | black | black, white |
| Country | United States | United States |
| Measurement Source | Audioholics | Audioholics |
| Drivers | 16” (406mm) driver | 15” (381mm) driver |
| Inputs | XLR, RCA, XLR out | XLR (2), RCA (line/LFE) |
| 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 12.5 Hz | - | 92.8 dB |
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