Short answer: both are discontinued, and they are rated the same for sound quality (#119 and #120 of 212 subwoofers). Either one is only an option used, so choose on condition and price. If you want one new, the HSU Research ULS-15 MK2 ranks #4 at $999.
Why pick the SVS 20-39 PC-Plus: A 12 inch ported cylinder subwoofer that stands tall on a small footprint, now discontinued. The catch: It stands 1016mm tall and weighs 54.9 lbs (24.9 kg), so it is tall and needs space to clear the port.
The case for the Velodyne Acoustics EQ-Max12: A 12 inch down-firing ported subwoofer with easy automatic room EQ, now discontinued. Watch for: Output in the 20 to 31.5Hz bands is 12dB below the 40Hz range, so deep movie effects play quietly.
Buy the SVS 20-39 PC-Plus or the Velodyne Acoustics EQ-Max12, whichever you find used in better condition; both are discontinued. For a new speaker, start with the HSU Research ULS-15 MK2 instead.
Want more options? Browse the full Subwoofers rankings.
Prices on this page were last checked November 14, 2026 at 6:17 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
| SVS 20-39 PC-Plus | Velodyne Acoustics EQ-Max12 | |
|---|---|---|
| Price | $1,399 Discontinued | $1,299 Discontinued |
| Ranked | #119 of 212 in Medium Home Subwoofers (30-75 lbs) | #120 of 212 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | ported, bottom | ported, bottom |
| Output SPL at 15 Hz | 91.0 dB | - |
| Output SPL at 20 Hz | 102.7 dB | 100.1 dB |
| Output SPL at 25 Hz | 110.3 dB | 100.1 dB |
| Output SPL at 31.5 Hz | 113.0 dB | 100.1 dB |
| Output SPL at 40 Hz | 112.8 dB | 112.3 dB |
| Output SPL at 50 Hz | 113.7 dB | 112.3 dB |
| Output SPL at 63 Hz | 112.0 dB | 112.3 dB |
| Output SPL at 80 Hz | 110.8 dB | - |
| CEA-2010-A Average (40-80Hz) | 112.3 dB | 112.3 dB (avg of 3/4 bands) |
| Dimensions | 40”H x 16”W x 16”D (1016.0 x 406.4 x 406.4 mm) | 17.9”H x 16.4”W x 18”D (453.9 x 415.8 x 457.2 mm) |
| Weight | 54.9 lbs (24.9 kg) | 61.1 lbs (27.7 kg) |
| Warranty | 5 | - |
| Country | United States | United States |
| Measurement Source | Ilkka Rissanen | Brent Butterworth |
| Amplifier Power | 525W RMS | 225W RMS |
| Frequency Response | 16-290Hz | 25-120Hz |
| Drivers | 12” (305mm) driver | 12” (305mm) driver |
Where the Ratings Come From
- SVS 20-39 PC-Plus: manufacturer specifications and listening comparisons; no independent measurement has been published yet.
- Velodyne Acoustics EQ-Max12: manufacturer specifications and listening comparisons; no independent measurement has been published yet.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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