In this review, we will be comparing Alpha S8 and Alpha S10, two Powered Subwoofer speakers by PSB. Being Powered subwoofers, they both have built-in amplifiers so you don't need an external power amp or an integrated amp to power them. Let's have a brief look at the main features of PSB Alpha S8 and PSB Alpha S10 first before getting into our more detailed comparison.
The sections below take each area in turn: driver and amplifier, frequency response, physical size and connectivity.
Drivers
The efficiency of a subwoofer is directly proportional to the total radiating are squared hence the woofer quantity and diameter.Both PSB Alpha S8and PSB Alpha S10 have a single woofer setup however the PSB Alpha S8's woofer is 8-inch whereas the PSB Alpha S10 features a 10-inch woofer.
Frequency Response
Alpha S8 has a frequency range of 35-150 Hz whereas Alpha S10 has a frequency range of 28-150 Hz. With a minimum frequency of 28Hz, the Alpha S10 can go significantly deeper on the low side and provide stronger bass compared to the Alpha S8's min frequency of 35Hz.
Below graphs depict how these two speakers compare with the max, min and average values of the Min and Max Frequencies of other speakers in the Subwoofer class in our database.
Low Frequency
Subwoofer Speakers
High Frequency
Subwoofer Speakers
Cabinet Type
Both PSB Alpha S8 and PSB Alpha S10 have Bass Reflex type cabinets. Bass Reflex type subwoofers (aka Ported, Vented or Reflex Port) have enclosures that uses a port, hole or vent cut into the cabinet. Ported designs are generally more efficient than the Sealed designs.
Physical Specs
The size of a speaker can sometimes be an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare PSB Alpha S8's and PSB Alpha S10's external dimensions. PSB Alpha S8 has external dimensions of 318.0 x 293.0 x 413.0mm (12-1/2 x 11-1/2 x 16-1/4inch) whereas PSB Alpha S10 has external dimensions of 358.0 x 358.0 x 472.0mm (14-1/16 x 14-1/16 x 18-9/16inch).
PSB Alpha S10 is clearly the larger of the two speakers. Its body is 65mm wider, 40mm taller and 59mm deeper than PSB Alpha S8.
Below you can see the front view size comparison of PSB Alpha S8 and PSB Alpha S10 in scale.
Comparison image of PSB Alpha S8 and PSB Alpha S10 Size and External Dimensions
Base Surface Area Comparison
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited.
The base surface area of the PSB Alpha S8 is approximately 1210.1cm2 / 187.6inch2 and base area of the PSB Alpha S10 is approximately 1689.8cm2 / 261.9inch2. The Alpha S8 requires 28% less surface area than the Alpha S10 which gives it a small advantage on placement in tight spaces.
Weight Comparison The weight of a subwoofer may become an important factor if you need to move and reposition the unit often to find the optimal positioning, also known as 'Subwoofer Crawling'. The PSB Alpha S8 weighs 9.55kg / 21lbs and the PSB Alpha S10 weighs 13.64kg / 30lbs. This makes the Alpha S10 43% heavier than the Alpha S8.
Here is a comparison of how Alpha S8 and Alpha S10's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
What's in the Box of PSB Alpha S8?
Here are the items that are included inside the box of Alpha S8:
- Powered subwoofer
- Grille
- 5-feet AC power cord
- 4 Rubber feet
- 4 Spike feet
- 4 Hex-nuts
- Quick Start Guide
- Important Safety Instructions
- Warranty Information
What's in the Box of PSB Alpha S10?
Here are the items that come with the Alpha S10:
- Powered subwoofer
- Grille
- 5-feet AC power cord
- 4 Rubber feet
- 4 Spike feet
- 4 Hex-nuts
- Quick Start Guide
- Important Safety Instructions
- Warranty Information
 Height |
318mm
vs
358mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1210cm2
vs
1689cm2
|
Takes less floor space |
 Price per pair* |
549USD
vs
699USD
|
costs less (*prices may change depending on the seller, location and time) |
 Woofer Size |
10 inches
vs
8 inches
|
Larger woofer |
| Low Frequency Response |
28 Hz
vs
35 Hz
|
Generates deeper bass |
Size, drawn to scale
Both subwoofers and both views share one scale, so everything here is directly comparable. Hover a box for its dimensions.
One scale for both, standing on the same floor and pushed back to the same wall, so the bigger one visibly takes more of the room.
PSB Alpha S10 needs about 40% more floor area. PSB Alpha S10 stands 59mm further into the room. PSB Alpha S10 is 40mm taller.
| General |
PSB Alpha S8 |
PSB Alpha S10 |
| Brand |
PSB |
PSB |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
150 watts |
150 watts |
| Frequency Response |
35-150 Hz |
28-150 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
150-watt RMS |
150-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
8" |
10" |
| Woofer Composition |
Polypropylene |
Polypropylene |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
front |
front |
Physical Specs |
|
|
| Height |
318.0mm (12.5") |
358.0mm (14.1") |
| Width |
293.0mm (11.5") |
358.0mm (14.1") |
| Depth |
413.0mm (16.3") |
472.0mm (18.6") |
| Weight |
9.55kg (21lbs) |
13.64kg (30lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
1 Year |
1 Year |
| Labor Warranty |
1 Year |
1 Year |
Siblings in PSB's Alpha range - same design thinking, different size. It comes down to your room and your budget.
| Area | Better | Why |
|---|
| Bass depth | B | PSB Alpha S10 goes deeper - 28Hz against 35Hz. A real difference, though most music has little content below 35Hz. |
| Amplifier power | evenly matched | Much the same amplifier (150W vs 150W RMS) - under 1dB apart. |
| Driver area | B | PSB Alpha S10 moves more air: 10" against 8" is 1.56x the cone area, not the 1.25x the diameters suggest. More area means the same output with less excursion, and less distortion with it. |
| Enclosure | evenly matched | Both are ported designs, so they roll off in much the same way. |
| Cabinet size | depends | PSB Alpha S8 is about 36% smaller by volume. In a subwoofer that is a real trade rather than a preference: box volume is how you get output low down without a bigger amplifier. |
| Price | A | PSB Alpha S8 costs less - $549 against $699, about 21% less. |
A PSB Alpha S8 B PSB Alpha S10
depends neither is better in the abstract - it turns on your room, your system or how you will use them. Only specs published for both subwoofers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
The usual trade-off: PSB Alpha S10 measures better, PSB Alpha S8 costs about 21% less. In a normal room, placement will make a bigger difference than the gap between these two. If placement is the constraint - a corner, behind a sofa, under a desk - PSB Alpha S8 is the one that will actually go there, and a well-placed small subwoofer beats a badly-placed big one every time.
One thing outweighs everything above: where the subwoofer stands. Room modes can add or remove 10dB or more at a given seat, which is far larger than any difference on this page. Before spending more, try the sub in two or three positions - the crawl test, where you put it in the listening seat and crawl the room to find where the bass sounds best, costs nothing and usually beats an upgrade.