In this review, we will be comparing SuperSub XXL and R-121SW, two Powered Subwoofer speakers from GoldenEar 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 GoldenEar SuperSub XXL 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 GoldenEar SuperSub XXL 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.
**This post contains affiliate links, and I will be compensated if you make a purchase after clicking through my 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.GoldenEar SuperSub XXL and Klipsch R-121SW have a totally different setup: the GoldenEar SuperSub XXL features 2 x 12-inch drivers whereas the R-121SW features 1 x 12-inch drivers.
Frequency Response
SuperSub XXL has a frequency range of 10-250 Hz whereas R-121SW has a frequency range of 28-120 Hz. With a minimum frequency of 10Hz, the SuperSub XXL 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
The GoldenEar SuperSub XXL has a Passive Radiator type cabinet. Passive Radiator type subwoofers sports a non-powered cone that moves in response to the main woofer to move air out in order to generate stronger bass in a smaller body compared to ported or sealed 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 GoldenEar SuperSub XXL's and Klipsch R-121SW's external dimensions. GoldenEar SuperSub XXL has external dimensions of 447.0 x 485.0 x 434.0mm ( 17-9/16inch x 19-1/16inch x 17-1/16inch ) 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 78mm narrower and 24mm shorter than GoldenEar SuperSub XXL but it is also 98mm deeper.
Below you can see the front view size comparison of GoldenEar SuperSub XXL and Klipsch R-121SW in scale.
Comparison image of GoldenEar SuperSub XXL 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 GoldenEar SuperSub XXL is approximately 2104.9cm2 / 326.3inch2 and base area of the Klipsch R-121SW is approximately 2165.2cm2 / 335.6inch2. The SuperSub XXL requires 3% 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 GoldenEar SuperSub XXL weighs 37.27kg / 82lbs and the Klipsch R-121SW weighs 16.00kg / 35.2lbs. This makes the SuperSub XXL 133% heavier than the R-121SW.
Here is a comparison of how SuperSub XXL 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 GoldenEar SuperSub XXL?
Here are the items that are included inside the box of SuperSub XXL:
Powered Subwoofer10-feet AC power cordOwners Manual
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
 Number of Woofers |
2
vs
1
|
More woofers |
| Low Frequency Response |
10 Hz
vs
28 Hz
|
Generates deeper bass |
 High Frequency Response |
250k Hz
vs
120k Hz
|
Generates higher frequency |
 Passive Radiator |
two 13-inch x 15-inch
vs
None
|
Increases the bass performance |
 Base Surface Area |
2104cm2 (485x434mm)
vs
2165cm2 (407x532mm)
|
Takes less floor space |
 Height |
423mm
vs
447mm
|
Easier to fit in smaller spaces |
 Price per pair* |
599USD
vs
2499USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
GoldenEar SuperSub XXL |
Klipsch Reference R-121SW |
| Brand |
GoldenEar |
Klipsch |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
1600 watts |
200 watts |
| Frequency Response |
10-250 Hz |
28-120 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
1600-watt RMS |
200-watt RMS |
Drivers |
|
|
| Woofer Quantity |
2 |
1 |
| Woofer Size |
12" |
12" |
| Woofer Composition |
Fiber |
Spun-Copper TCP |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
side |
front |
Physical Specs |
|
|
| Height |
447.0mm (17.6") |
423.0mm (16.7") |
| Width |
485.0mm (19.1") |
407.0mm (16") |
| Depth |
434.0mm (17.1") |
532.0mm (20.9") |
| Weight |
37.27kg (82lbs) |
16.00kg (35.2lbs) |
| Enclosure |
Passive Radiator |
Bass Reflex |
| Grille |
n/a |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
3 Years |
2 Years |
| Labor Warranty |
3 Years |
2 Years |