The PSB Alpha S8 ranks #45 out of 60 total Small Home Subwoofers (Under 30 lbs) for sound quality. See all Subwoofers rankings for every top pick.
Brand: PSB
Prices on this page were last checked October 5, 2026 at 10:21 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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#45 PSB Alpha S8: $499.00 Estimated Crutchfield eBay
Larger model: the PSB Alpha S10 (ranked higher, estimated 3.4/5).
Pros: Compact 8-inch polypropylene woofer with rear bass reflex port powered by a 150W continuous / 210W dynamic Class D amplifier. Lightweight 21-lb design integrates smoothly with Alpha series bookshelf monitors down to 35Hz (-3dB).
Cons: Modest low-frequency extension and output headroom limit effectiveness in large rooms. Lacks mobile app DSP or automated room calibration.
How it compares: Just above it: Paradigm Defiance V8 - $49 cheaper. Just below it: Yamaha NS-SW100 - $249 cheaper.
| Amplifier Power | 150W continuous / 210W dynamic (Class D) |
|---|---|
| Dimensions | 12.5”H x 11”W x 15”D (318 x 279 x 381 mm) |
| Drivers | 8” (203mm) polypropylene cone, rubber surround |
| Enclosure | ported, rear port |
| Frequency Response | 35Hz - 150Hz (+/- 3dB, manufacturer specified) |
| Weight | 21.2 lbs (9.6 kg) |
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- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.