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Klipsch Reference R-121SW vs Definitive Technology SuperCube 2000 Comparison
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Klipsch R-121SW

Powered Subwoofer | 28-120 Hz

Klipsch Reference R-121SW
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DT SuperCube 2000

Powered Subwoofer | 20-200 Hz

Definitive Technology SuperCube 2000
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Klipsch R-121SW Klipsch R-121SW
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DT SuperCube 2000 DT SuperCube 2000
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Klipsch R-121SW
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DT SuperCube 2000
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Klipsch R-121SW vs DT SuperCube 2000 Speaker Comparison

In this review, we will be comparing R-121SW and SuperCube 2000, two Powered Subwoofer speakers from Klipsch and Definitive Technology. 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 Klipsch R-121SW and DT SuperCube 2000 first before getting into our more detailed comparison.

Klipsch R-121SW Key Specs

  • 12" Spun-Copper TCP Woofer
  • 28-120 Hz Frequency Response
  • 200 watts Max Amplifier Output
  • Weight:16.00kg
  • Dimensions (H x W x D): 423.0" x 16" x 20-15/16"( 423.0 x 407.0 x 532.0mm )

DT SuperCube 2000 Key Specs

  • 7.5" Not given Woofer
  • 20-200 Hz Frequency Response
  • 650 watts Max Amplifier Output
  • Weight:11.36kg
  • Dimensions (H x W x D): 275.0" x 10-1/4" x 12-5/8"( 275.0 x 261.0 x 321.0mm )

In the following sections, we will get into details in order to better understand how the Klipsch R-121SW and DT SuperCube 2000 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.Both Klipsch R-121SWand DT SuperCube 2000 have a single woofer setup however the Klipsch R-121SW's woofer is 12-inch whereas the DT SuperCube 2000 features a 7.5-inch woofer.

Frequency Response

R-121SW has a frequency range of 28-120 Hz whereas SuperCube 2000 has a frequency range of 20-200 Hz. With a minimum frequency of 20Hz, the SuperCube 2000 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

Klipsch R-121SW
DT SuperCube 2000
Min
Average
Max
High Frequency

Subwoofer Speakers

Klipsch R-121SW
DT SuperCube 2000
Min
Average
Max

Cabinet Type

The Klipsch R-121SW has a Bass Reflex type cabinet. 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. On the other hand the DT SuperCube 2000 have Passive Radiator type enclosure. 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.

Klipsch R-121SW  Port
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 Klipsch R-121SW's and DT SuperCube 2000's external dimensions. Klipsch R-121SW has external dimensions of 423.0 x 407.0 x 532.0mm ( 16-5/8inch x 16inch x 20-15/16inch ) whereas DT SuperCube 2000 has external dimensions of 275.0 x 261.0 x 321.0mm ( 10-13/16 x 10-1/4 x 12-5/8inch) .

Klipsch R-121SW is clearly the larger of the two speakers. Its body is 146mm wider, 148mm taller and 211mm deeper than DT SuperCube 2000.

Below you can see the front view size comparison of Klipsch R-121SW and DT SuperCube 2000 in scale.

Klipsch R-121SW vs DT SuperCube 2000 Size Comparison - Front View
Comparison image of Klipsch R-121SW and DT SuperCube 2000 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 Klipsch R-121SW is approximately 2165.2cm2 / 335.6inch2 and base area of the DT SuperCube 2000 is approximately 837.8cm2 / 129.9inch2. The R-121SW requires 158% more surface area than the SuperCube 2000 which gives it a small disadvantage 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 Klipsch R-121SW weighs 16.00kg / 35.2lbs and the DT SuperCube 2000 weighs 11.36kg / 25lbs. This makes the R-121SW 41% heavier than the SuperCube 2000.

Here is a comparison of how R-121SW and SuperCube 2000's weights compare with the average, max and min weights in Powered Subwoofer class.

Weight
All Subwoofer Speakers
Klipsch R-121SW
DT SuperCube 2000
Min
Average
Max

What's in the Box of Klipsch R-121SW?

Here are the items that are included inside the box of R-121SW:
  • Powered subwoofer
  • Grille
  • 6.5-feet AC power cord
  • User Manual
  • Important Safety Instructions
  • Warranty Information
  • What's in the Box of DT SuperCube 2000?

    Here are the items that come with the SuperCube 2000:
  • 7.5-inch Powered subwoofer
  • 7-feet AC power cord
  • 4 Threaded rubber-feet
  • 4 Spike feet (hex-nut attached)
  • Owners Manual
  • Online Product Registration card

  • Reasons to choose Klipsch Reference R-121SW over Definitive Technology SuperCube 2000
    Woofer Size 12 inches vs 7.5 inches Larger woofer
    Reasons to choose Definitive Technology SuperCube 2000 over Klipsch Reference R-121SW
    Low Frequency Response 20 Hz vs 28 Hz Generates deeper bass
    High Frequency Response 200k Hz vs 120k Hz Generates higher frequency
    Height 275mm vs 423mm Easier to fit in smaller spaces
    Base Surface Area 837cm2 vs 2165cm2 Takes less floor space
    Klipsch R-121SW vs DT SuperCube 2000 Specs Table
    Detailed comparison of specifications
    General Klipsch Reference R-121SW Definitive Technology SuperCube 2000
    Brand Klipsch Definitive Technology
    Speaker Type Powered Subwoofer Powered Subwoofer
    Max Amplifier Output 200 watts 650 watts
    Frequency Response 28-120 Hz 20-200 Hz
    Amplifier
    Watts RMS (Continuous) 200-watt RMS 650-watt RMS
    Drivers
    Woofer Quantity 1 1
    Woofer Size 12" 7.5"
    Woofer Composition Spun-Copper TCP Not given
    Tweeter Size - -
    Aimable Tweeter No No
    Midrange Driver No No
    Firing Direction front front
    Physical Specs
    Height 423.0mm (16.7") 275.0mm (10.8")
    Width 407.0mm (16") 261.0mm (10.3")
    Depth 532.0mm (20.9") 321.0mm (12.6")
    Weight 16.00kg (35.2lbs) 11.36kg (25lbs)
    Enclosure Bass Reflex Passive Radiator
    Grille Yes n/a
    Moisture Resistancy No No
    Connections
    Other
    Parts Warranty 2 Years 3 Years
    Labor Warranty 2 Years 3 Years

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