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.
The case for the Reaction Audio PV-15X: 15-inch ported driver delivers 126.2dB CEA-2010-A average from a purpose-built cinema-style cabinet. The catch: Passive design requires a separate external amplifier and weighs 68 kg (149.9 lbs).
What the REL Acoustics R-528 gets right: 12-inch carbon-fiber passive radiator with 500W RMS Class D amp reaches 21Hz.
Buy the REL Acoustics R-528 if you want one new; the Reaction Audio PV-15X is discontinued, so only look for it used.
Want more options? Browse the full Subwoofers rankings.
Specifications Side By Side
| Reaction Audio PV-15X | REL Acoustics R-528 | |
|---|---|---|
| Price | $1999 Discontinued | $1999 |
| Ranked | #21 of 110 in Large Home Subwoofers (Over 75 lbs) | #69 of 145 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 |
| Discontinued | Yes | - |
| Weight | 149.9 lbs (68 kg) | 58 lbs (26.3 kg) |
| Drivers | 15" (381mm) driver | 12" (305mm) driver |
| Warranty | - | 3 |
| Country | - | United Kingdom |
| Amplifier Power | - | 500W RMS |
| Frequency Response | - | 21Hz-6dB |
Related Speaker Comparisons
How Reaction Audio PV-15X compares with other leading options:
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- Reaction Audio PV-15X vs WW Speaker Cabinets X21 - B&C 21DS115-4
- Reaction Audio PV-15X vs Pro Audio Technology LFC-24sm
- Power Sound Audio (PSA) TRIAX vs Reaction Audio PV-15X
Prices on this page were last checked September 23, 2026 at 11:24 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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The Two Speakers In Full
Reaction Audio PV-15X: $1999 Discontinued eBay
Pros: 15-inch ported driver delivers 126.2dB CEA-2010-A average from a purpose-built cinema-style cabinet.
Cons: Passive design requires a separate external amplifier and weighs 68 kg. Discontinued.
Full Reaction Audio PV-15X review and specifications →
| CEA-2010-A Average (40-80Hz) | 126.2 dB |
|---|---|
| Dimensions | 18"H x 22"W x 29"D (457.2 x 558.8 x 736.6 mm) |
| Discontinued | Yes |
| Drivers | 15" (381mm) driver |
| Enclosure | ported, rear |
| Measurement Source | Data-bass |
| Output SPL at 15 Hz | 105.3 dB |
| Output SPL at 20 Hz | 111.3 dB |
| Output SPL at 25 Hz | 116.1 dB |
| Output SPL at 31.5 Hz | 119.8 dB |
| Output SPL at 40 Hz | 125.3 dB |
| Output SPL at 50 Hz | 126.8 dB |
| Output SPL at 63 Hz | 126.1 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 |
| Weight | 149.9 lbs (68 kg) |
- Reviews, Comparisons and Sound Samples
- Independently measured by Data-bass; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons
- Reaction Audio PV-15X vs JTR Speakers Captivator 2400
- Reaction Audio PV-15X vs Funk Audio Ultra 21.0LX
- Reaction Audio PV-15X vs Monoprice Monolith M-215
- Reaction Audio PV-15X vs Monoprice Monolith 16 THX Ultra
- Reaction Audio PV-15X vs JBL 4645C
- Reaction Audio PV-15X vs Danley Sound Labs DTS10
- Reaction Audio PV-15X vs JTR Speakers Growler (2015)
- Reaction Audio PV-15X vs Chase Home Theater SS18.1
- See all 23 comparisons
REL Acoustics R-528: $1999 eBay
Pros: 12-inch carbon-fiber passive radiator with 500W RMS Class D amp reaches 21Hz. Fast impulse response best in REL series. Breathtaking bass reach and low distortion in compact package. Speed and detail-oriented musicality. Premium fit and finish.
Full REL Acoustics R-528 review and specifications →
| Amplifier Power | 500W RMS |
|---|---|
| CEA-2010-A Average (40-80Hz) | 112.8 dB (avg of 3/4 bands) |
| Country | United Kingdom |
| Dimensions | 17.5"H x 15.5"W x 17.2"D (444.5 x 393.7 x 436.9 mm) |
| Drivers | 12" (305mm) driver |
| Enclosure | passive radiator |
| Frequency Response | 21Hz-6dB |
| Measurement Source | Brent Butterworth |
| Output SPL at 25 Hz | 92.7 dB |
| Output SPL at 31.5 Hz | 106.5 dB |
| Output SPL at 40 Hz | 111.0 dB |
| Output SPL at 50 Hz | 112.7 dB |
| Output SPL at 63 Hz | 114.6 dB |
| Warranty | 3 |
| Weight | 58 lbs (26.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Brent Butterworth; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons