Short answer: the PSB Alpha S10. It ranks #31 of 73 subwoofers by sound quality, rated 3.4/5, at $849; the PSB SubSeries BP7 ranks #43, rated 3.3/5, and costs $1,249, so there is not much of a tradeoff to weigh.
The case for 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 SubSeries BP7 does well: A compact sealed subwoofer with two 6.5” woven carbon fiber drivers mounted in opposition, which cancels cabinet vibration, driven by a 350W Class D amplifier. Watch for: No independent measurements yet, so its output can’t be compared directly with ranked subwoofers; the rating is estimated from the measured PSB Speakers SubSeries 250 (112.5dB in the 40 to 80Hz CEA-2010 bands).
Buy the PSB Alpha S10. It is rated higher for sound quality than the PSB SubSeries BP7 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
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 SubSeries BP7 2.9 to 3.6). Treat this verdict as provisional.
Looking for alternatives? See the complete Subwoofers rankings.
Specifications Side By Side
| PSB Alpha S10 | PSB SubSeries BP7 | |
|---|---|---|
| Price | $849.00 | $1,249.00 |
| Ranked | #31 of 73 in Small Home Subwoofers (Under 30 lbs) Estimated | #43 of 73 in Small Home Subwoofers (Under 30 lbs) Estimated |
| Country | Canada | Canada |
| Warranty | 5/1 | 5/1 |
| Enclosure | ported, rear port | sealed |
| Drivers | 10” (254mm) polypropylene cone, rubber surround | 2 x 6.5” woven carbon fiber drivers (opposed) |
| Amplifier Power | 150W continuous / 210W dynamic (Class D) | 350W Class D |
| Frequency Response | 28Hz - 150Hz (+/- 3dB, manufacturer specified) | 28-150Hz ±3dB (manufacturer specified) |
| Dimensions | 14”H x 13”W x 15.7”D (356 x 330 x 399 mm) | 11.4”H x 10.6”W x 10.6”D (290 x 269 x 269 mm) |
| Weight | 30 lbs (13.6 kg) | 26.5 lbs (12 kg) |
Related Speaker Comparisons
How PSB Alpha S10 compares with other leading options:
- MartinLogan Dynamo Foundation 12 vs PSB Alpha S10
- PSB Alpha S10 vs Bowers & Wilkins ASW610
- PSB Alpha S10 vs PSB Alpha S8
- Bowers & Wilkins ASW610 vs PSB SubSeries BP7
- Focal Sub Air vs PSB SubSeries BP7
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 SubSeries BP7: $1,249.00 Estimated Amazon eBay
Same family: the PSB SubSeries BP8 (larger subwoofer, estimated 3.6/5) and the PSB SubSeries BP12 (larger subwoofer, estimated 4.2/5).
Pros: A compact sealed subwoofer with two 6.5” woven carbon fiber drivers mounted in opposition, which cancels cabinet vibration, driven by a 350W Class D amplifier. PSB rates it 28 to 150Hz (±3dB) and 25Hz at -10dB from a 27cm cube.
Cons: No independent measurements yet, so its output can’t be compared directly with ranked subwoofers; the rating is estimated from the measured PSB Speakers SubSeries 250 (112.5dB in the 40 to 80Hz CEA-2010 bands). Two 6.5” drivers have limited cone area, so output is modest.
Full PSB SubSeries BP7 review and specifications →
| Released | Oct 2025 (1 year ago) |
|---|---|
| Amplifier Power | 350W Class D |
| Country | Canada |
| Dimensions | 11.4”H x 10.6”W x 10.6”D (290 x 269 x 269 mm) |
| Drivers | 2 x 6.5” woven carbon fiber drivers (opposed) |
| Enclosure | sealed |
| Frequency Response | 28-150Hz ±3dB (manufacturer specified) |
| Warranty | 5/1 |
| Weight | 26.5 lbs (12 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