In this review, we will be comparing R-121SW and R-10SWi, two Powered Subwoofer speakers by 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 Klipsch R-121SW and Klipsch R-10SWi 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 Klipsch R-121SWand Klipsch R-10SWi have a single woofer setup however the Klipsch R-121SW's woofer is 12-inch whereas the Klipsch R-10SWi features a 10-inch woofer.
Frequency Response
R-121SW has a frequency range of 28-120 Hz whereas R-10SWi has a frequency range of 32-120 Hz. With a minimum frequency of 28Hz, the R-121SW can go slightly deeper then the R-10SWi's min frequency of 32Hz.
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 Klipsch R-121SW and Klipsch R-10SWi 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
Klipsch R-10SWi 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 Klipsch R-121SW's and Klipsch R-10SWi'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 Klipsch R-10SWi has external dimensions of 370.0 x 318.0 x 462.0mm (14-9/16 x 12-1/2 x 18-3/16inch).
Klipsch R-121SW is clearly the larger of the two speakers. Its body is 89mm wider, 53mm taller and 70mm deeper than Klipsch R-10SWi.
Below you can see the front view size comparison of Klipsch R-121SW and Klipsch R-10SWi in scale.
Comparison image of Klipsch R-121SW and Klipsch R-10SWi 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 Klipsch R-10SWi is approximately 1469.2cm2 / 227.7inch2. The R-121SW requires 47% more surface area than the R-10SWi 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 Klipsch R-10SWi weighs 11.59kg / 25.5lbs. This makes the R-121SW 38% heavier than the R-10SWi.
Here is a comparison of how R-121SW and R-10SWi's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
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 Klipsch R-10SWi?
Here are the items that come with the R-10SWi:
- Powered sub
- Wireless transmitter (attached 12
 Woofer Size |
12 inches
vs
10 inches
|
Larger woofer |
| Low Frequency Response |
28 Hz
vs
32 Hz
|
Generates deeper bass |
 Port Position |
Front
vs
Rear
|
Gives more flexibility placing close to walls |
 Height |
370mm
vs
423mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1469cm2
vs
2165cm2
|
Takes less floor space |
 Price per pair* |
274USD
vs
599USD
|
costs less (*prices may change depending on the seller, location and time) |
 Wireless Operation |
Yes
vs
No
|
Connect your subwoofer to your system wireless |
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.
Klipsch R-121SW needs about 47% more floor area. Klipsch R-121SW stands 70mm further into the room. Klipsch R-121SW is 53mm taller.
| General |
Klipsch Reference R-121SW |
Klipsch Reference R-10SWi |
| Brand |
Klipsch |
Klipsch |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
200 watts |
150 watts |
| Frequency Response |
28-120 Hz |
32-120 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
200-watt RMS |
150-watt RMS |
| Watts Peak (Max) |
n/a |
300-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
12" |
10" |
| Woofer Composition |
Spun-Copper TCP |
Copper IMG |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
front |
rear |
Physical Specs |
|
|
| Height |
423.0mm (16.7") |
370.0mm (14.6") |
| Width |
407.0mm (16") |
318.0mm (12.5") |
| Depth |
532.0mm (20.9") |
462.0mm (18.2") |
| Weight |
16.00kg (35.2lbs) |
11.59kg (25.5lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
2 Years |
2 Years |
| Labor Warranty |
2 Years |
2 Years |
Siblings in Klipsch's Reference (R) Subwoofer range - same design thinking, different size. It comes down to your room and your budget.
| Area | Better | Why |
|---|
| Bass depth | A | Klipsch R-121SW goes deeper - 28Hz against 32Hz. A real difference, though most music has little content below 32Hz. |
| Amplifier power | A | Klipsch R-121SW has the bigger amplifier - 200W against 150W RMS, about 1.2dB more on tap. In a large room that is headroom before the DSP starts limiting. |
| Driver area | A | Klipsch R-121SW moves more air: 12" against 10" is 1.44x the cone area, not the 1.2x 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. |
| Wireless option | depends | Only Klipsch R-10SWi offers a wireless link. It decides where the sub can go if you cannot run a cable, and is worth nothing if you can. |
| Cabinet size | depends | Klipsch R-10SWi is about 41% 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 | B | Klipsch R-10SWi costs less - $274 against $599, about 54% less. |
A Klipsch R-121SW B Klipsch R-10SWi
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: Klipsch R-121SW measures better, Klipsch R-10SWi costs about 54% less. In a normal room, placement will make a bigger difference than the gap between these two. Two small subwoofers beat one big one in most rooms - a pair evens out the room modes in a way no single box can, whatever its specs. At $274 each, two Klipsch R-10SWi cost about $548 against $599 for one of the other, which is worth a thought. If placement is the constraint - a corner, behind a sofa, under a desk - Klipsch R-10SWi 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.