In this review, we will be comparing SubSeries BP8 and R-121SW, two Powered Subwoofer speakers from PSB and Klipsch. 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 SubSeries BP8 and Klipsch R-121SW first before getting into our more detailed comparison.
In the following sections, we will get into details in order to better understand how the PSB SubSeries BP8 and Klipsch R-121SW compare and hopefully end up with enough arguments to decide which one of these subwoofers is the better choice for you.
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Drivers
The efficiency of a subwoofer is directly proportional to the total radiating are squared hence the woofer quantity and diameter.Both PSB SubSeries BP8and Klipsch R-121SW have a single woofer setup however the PSB SubSeries BP8's woofer is 8-inch whereas the Klipsch R-121SW features a 12-inch woofer.
Frequency Response
SubSeries BP8 has a frequency range of 25-150 Hz whereas R-121SW has a frequency range of 28-120 Hz. With a minimum frequency of 25Hz, the SubSeries BP8 can go slightly deeper then the R-121SW's min frequency of 28Hz.
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
The PSB SubSeries BP8 has a Acoustic Suspension type cabinet. Acoustic Suspension aka Sealed type subwoofers have enclosures that are sealed hence no ports or holes exists on the cabinet. Sealed designs helps to provide more accurate and tight bass responses compared to ported designs. On the other hand the Klipsch R-121SW have Bass Reflex type enclosure. 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.
Klipsch R-121SW Port
Physical Specs
Size of a speaker can sometimes become 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 SubSeries BP8's and Klipsch R-121SW's external dimensions. PSB SubSeries BP8 has external dimensions of 355 x 330 x 330mm ( 14 x 13 x 13 inch) whereas Klipsch R-121SW has external dimensions of 423.0 x 407.0 x 532.0mm ( 16-5/8inch x 16inch x 20-15/16inch ) .
Klipsch R-121SW is clearly the larger of the two speakers. Its body is 77mm wider, 68mm taller and 202mm deeper than PSB SubSeries BP8.
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 SubSeries BP8 is approximately 1089.0cm2 / 168.8inch2 and base area of the Klipsch R-121SW is approximately 2165.2cm2 / 335.6inch2. The SubSeries BP8 requires 50% less surface area than the R-121SW 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 SubSeries BP8 weighs 19.10kg / 42lbs and the Klipsch R-121SW weighs 16.00kg / 35.2lbs. This makes the SubSeries BP8 19% heavier than the R-121SW.
Here is a comparison of how SubSeries BP8 and R-121SW'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 SubSeries BP8?
Here are the items that are included inside the box of SubSeries BP8:
Powered subwooferDetachable grille8-feet Power cordOwners GuideSpecifications sheetWarranty Card
What's in the Box of Klipsch R-121SW?
Here are the items that come with the R-121SW:
Powered subwooferGrille6.5-feet AC power cordUser ManualImportant Safety InstructionsWarranty Information
 Low Frequency Response |
25 Hz
vs
28 Hz
|
Generates deeper bass |
 High Frequency Response |
150k Hz
vs
120k Hz
|
Generates higher frequency |
 Height |
355mm
vs
423mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1089cm2 (330x330mm)
vs
2165cm2 (407x532mm)
|
Takes less floor space |
| Woofer Size |
12 inches
vs
8 inches
|
Larger woofer |
 Price per pair* |
599USD
vs
1499USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
PSB SubSeries BP8 |
Klipsch Reference R-121SW |
| Brand |
PSB |
Klipsch |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
500 watts |
200 watts |
| Frequency Response |
25-150 Hz |
28-120 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
500-watt RMS |
200-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
8" |
12" |
| Woofer Composition |
Carbon Fibre |
Spun-Copper TCP |
| Woofer Surround Material |
High Density Rubber |
n/a |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
n/a |
front |
Physical Specs |
|
|
| Height |
355.0mm (14") |
423.0mm (16.7") |
| Width |
330.0mm (13") |
407.0mm (16") |
| Depth |
330.0mm (13") |
532.0mm (20.9") |
| Weight |
19.10kg (42lbs) |
16.00kg (35.2lbs) |
| Enclosure |
Acoustic Suspension |
Bass Reflex |
| Available Colors |
Satin Black, Satin White |
n/a |
| Grille |
n/a |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
1 Year |
2 Years |
| Labor Warranty |
1 Year |
2 Years |