Short answer: the PSB Alpha S10. It ranks #31 of 73 subwoofers by sound quality, rated 3.4/5, at $849. The PSB Alpha S8 ranks #50, rated 3.2/5, at $749, $100 cheaper, a saving that is not big enough to make up the sound-quality gap.
Why pick the PSB Alpha S10: 10-inch polypropylene woofer in a rear-ported enclosure powered by a 150W continuous / 210W dynamic Class D amplifier. Watch for: Rear bass reflex port requires ample breathing space from back walls to avoid port turbulence.
What the PSB Alpha S8 does well: Compact 8-inch polypropylene woofer with rear bass reflex port powered by a 150W continuous / 210W dynamic Class D amplifier. The tradeoff: Modest low-frequency extension and output headroom limit effectiveness in large rooms.
Buy the PSB Alpha S10. It is rated higher for sound quality, and saving $100 with the PSB Alpha S8 does not make up for the sound-quality gap.
About the ratings: neither speaker has been measured yet, so both ratings are estimated from measured siblings and predecessors (likely ranges: PSB Alpha S10 3.2 to 3.6; PSB Alpha S8 3.0 to 3.4). Treat this verdict as provisional.
Looking for alternatives? See the complete Subwoofers rankings.
Specifications Side By Side
| PSB Alpha S10 | PSB Alpha S8 | |
|---|---|---|
| Price | $849.00 | $749.00 |
| Ranked | #31 of 73 in Small Home Subwoofers (Under 30 lbs) Estimated | #50 of 73 in Small Home Subwoofers (Under 30 lbs) Estimated |
| Country | Canada | Canada |
| Warranty | 5/1 | 5/1 |
| Enclosure | ported, rear port | ported, rear port |
| Drivers | 10” (254mm) polypropylene cone, rubber surround | 8” (203mm) polypropylene cone, rubber surround |
| Amplifier Power | 150W continuous / 210W dynamic (Class D) | 150W continuous / 210W dynamic (Class D) |
| Frequency Response | 28Hz - 150Hz (+/- 3dB, manufacturer specified) | 35Hz - 150Hz (+/- 3dB, manufacturer specified) |
| Dimensions | 14”H x 13”W x 15.7”D (356 x 330 x 399 mm) | 12.5”H x 11”W x 15”D (318 x 279 x 381 mm) |
| Weight | 30 lbs (13.6 kg) | 21.2 lbs (9.6 kg) |
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Prices on this page were last checked October 11, 2026 at 4:59 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
PSB Alpha S10: $849.00 Estimated Amazon eBay
Same family: the PSB Alpha S8 (smaller subwoofer, ranked lower, estimated 3.2/5).
Pros: 10-inch polypropylene woofer in a rear-ported enclosure powered by a 150W continuous / 210W dynamic Class D amplifier. Extends bass authority down to 28Hz (-3dB) with clean articulation for stereo music and movie soundtracks.
Cons: Rear bass reflex port requires ample breathing space from back walls to avoid port turbulence. Does not include onboard parametric EQ.
Full PSB Alpha S10 review and specifications →
| Released | 2020 (6 years ago) |
|---|---|
| Amplifier Power | 150W continuous / 210W dynamic (Class D) |
| Country | Canada |
| Dimensions | 14”H x 13”W x 15.7”D (356 x 330 x 399 mm) |
| Drivers | 10” (254mm) polypropylene cone, rubber surround |
| Enclosure | ported, rear port |
| Frequency Response | 28Hz - 150Hz (+/- 3dB, manufacturer specified) |
| Warranty | 5/1 |
| Weight | 30 lbs (13.6 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons
PSB Alpha S8: $749.00 Estimated Amazon eBay
Same family: the PSB Alpha S10 (larger subwoofer, 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.
Full PSB Alpha S8 review and specifications →
| Released | 2020 (6 years ago) |
|---|---|
| Amplifier Power | 150W continuous / 210W dynamic (Class D) |
| Country | Canada |
| 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) |
| Warranty | 5/1 |
| Weight | 21.2 lbs (9.6 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons