Short answer: the Reaction Audio PV-15X for output, the REL Acoustics R-528 for built-in amplification and 21Hz reach. The PV-15X’s 15-inch ported driver delivers 126.2dB CEA-2010-A average from a purpose-built cinema cabinet, but it is passive, needing a separate external amplifier, and weighs 68 kg (149.9 lbs). The R-528 pairs a 12-inch carbon-fiber passive radiator with a 500W RMS Class D amp and reaches 21Hz.
Buy the Reaction Audio PV-15X only if you find one used in good condition; both are discontinued, and it is the better rated of the two. For a new speaker, buy the REL Acoustics S/850, which replaces the REL Acoustics R-528.
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Specifications Side By Side
| Reaction Audio PV-15X | REL Acoustics R-528 | |
|---|---|---|
| Price | $1,999 Passive, Discontinued | $1,999 Discontinued |
| Ranked | #22 of 143 in Large Home Subwoofers (Over 75 lbs) | #95 of 212 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | ported, rear | passive radiator |
| Output SPL at 15 Hz | 105.3 dB | - |
| Output SPL at 20 Hz | 111.3 dB | - |
| Output SPL at 25 Hz | 116.1 dB | 92.7 dB |
| Output SPL at 31.5 Hz | 119.8 dB | 106.5 dB |
| Output SPL at 40 Hz | 125.3 dB | 111.0 dB |
| Output SPL at 50 Hz | 126.8 dB | 112.7 dB |
| Output SPL at 63 Hz | 126.1 dB | 114.6 dB |
| Output SPL at 80 Hz | 126.5 dB | - |
| Output SPL at 100 Hz | 126.4 dB | - |
| Output SPL at 125 Hz | 126.1 dB | - |
| CEA-2010-A Average (40-80Hz) | 126.2 dB | 112.8 dB (avg of 3/4 bands) |
| Dimensions | 18”H x 22”W x 29”D (457.2 x 558.8 x 736.6 mm) | 17.5”H x 15.5”W x 17.2”D (444.5 x 393.7 x 436.9 mm) |
| Measurement Source | Data-bass | Brent Butterworth |
| Weight | 149.9 lbs (68 kg) | 58 lbs (26.3 kg) |
| Drivers | 15” (381mm) driver | 12” (305mm) driver |
| Passive | Yes | - |
| Warranty | - | 3 |
| Country | - | United Kingdom |
| Amplifier Power | - | 500W RMS |
| Frequency Response | - | 21Hz-6dB |
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