In this review, we will be comparing Varro PS500-BK and R-121SW, two Powered Subwoofer speakers from ELAC 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 ELAC Varro PS500-BK and Klipsch R-121SW 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.
**This post contains affiliate links, and we will be compensated if you make a purchase after clicking through our links. As an Amazon Associate I earn from qualifying purchases.
Drivers
The efficiency of a subwoofer is directly proportional to the total radiating are squared hence the woofer quantity and diameter.Both ELAC Varro PS500-BKand Klipsch R-121SW have a single woofer setup however the ELAC Varro PS500-BK's woofer is 15-inch whereas the Klipsch R-121SW features a 12-inch woofer.
Frequency Response
Varro PS500-BK has a frequency range of 20-150 Hz whereas R-121SW has a frequency range of 28-120 Hz. With a minimum frequency of 20Hz, the Varro PS500-BK can go significantly deeper on the low side and provide stronger bass compared to 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
Both ELAC Varro PS500-BK and Klipsch R-121SW 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.
Klipsch R-121SW Port
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 ELAC Varro PS500-BK's and Klipsch R-121SW's external dimensions. ELAC Varro PS500-BK has external dimensions of 482.0 x 461.0 x 461.0mm (18-15/16inch x 18-1/8inch x 18-1/8inch) 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 54mm narrower and 59mm shorter than ELAC Varro PS500-BK but it is also 71mm deeper.
Below you can see the front view size comparison of ELAC Varro PS500-BK and Klipsch R-121SW in scale.
Comparison image of ELAC Varro PS500-BK and Klipsch R-121SW 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 ELAC Varro PS500-BK is approximately 2125.2cm2 / 329.4inch2 and base area of the Klipsch R-121SW is approximately 2165.2cm2 / 335.6inch2. The Varro PS500-BK requires 2% 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 ELAC Varro PS500-BK weighs 25.95kg / 57.1lbs and the Klipsch R-121SW weighs 16.00kg / 35.2lbs. This makes the Varro PS500-BK 62% heavier than the R-121SW.
Here is a comparison of how Varro PS500-BK 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 ELAC Varro PS500-BK?
Here are the items that are included inside the box of Varro PS500-BK:
- Grill
- Power Cord
- 4 Spikes
What's in the Box of Klipsch R-121SW?
Here are the items that come with the R-121SW:
- Powered subwoofer
- Grille
- 6.5-feet AC power cord
- User Manual
- Important Safety Instructions
- Warranty Information
 Woofer Size |
15 inches
vs
12 inches
|
Larger woofer |
| Low Frequency Response |
20 Hz
vs
28 Hz
|
Generates deeper bass |
 High Frequency Response |
150k Hz
vs
120k Hz
|
Generates higher frequency |
 App-Based Control |
iOS,Android
vs
None
|
Control the speaker via an app |
 Base Surface Area |
2125cm2
vs
2165cm2
|
Takes less floor space |
 Height |
423mm
vs
482mm
|
Easier to fit in smaller spaces |
 Price per pair* |
599USD
vs
999USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
ELAC Varro PS500-BK |
Klipsch Reference R-121SW |
| Brand |
ELAC |
Klipsch |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
500 watts |
200 watts |
| Frequency Response |
20-150 Hz |
28-120 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
500-watt RMS |
200-watt RMS |
| Watts Peak (Max) |
1000-watt RMS |
n/a |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
15" |
12" |
| Woofer Composition |
Treated paper |
Spun-Copper TCP |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
bottom |
front |
Physical Specs |
|
|
| Height |
482.0mm (19") |
423.0mm (16.7") |
| Width |
461.0mm (18.1") |
407.0mm (16") |
| Depth |
461.0mm (18.1") |
532.0mm (20.9") |
| Weight |
25.95kg (57.1lbs) |
16.00kg (35.2lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF |
n/a |
| Available Colors |
Black |
n/a |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| USB Port |
USB-A port for firmware updates |
n/a |
Other |
|
|
| Parts Warranty |
1 year |
2 Years |
| Labor Warranty |
1 year |
2 Years |