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🎶 Feel the bass, own the room — Klipsch R-121SW redefines your soundscape!
The Klipsch Reference R-121SW is a 12-inch front-firing subwoofer featuring a revolutionary spun-copper thermoformed crystalline polymer woofer that delivers deep, distortion-free bass. Powered by a 400W all-digital amplifier, it offers high efficiency and true-to-source sound reproduction. With flexible placement options, low-pass crossover, phase control, and universal AV compatibility, it’s engineered to elevate your home theater experience with powerful, precise low frequencies.






| ASIN | B09P8WJTB3 |
| Additional Features | Digital Amplifier |
| Antenna Location | For Televisions |
| Audio Driver Size | 12 inches |
| Audio Driver Type | Bass Driver |
| Audio Output Mode | Surround |
| Best Sellers Rank | #18,340 in Electronics ( See Top 100 in Electronics ) #23 in Home Audio Subwoofers |
| Brand | Klipsch |
| Built-In Media | Speaker |
| Color | Black |
| Compatible Devices | Television |
| Compatible with Vehicle Type | Car |
| Connectivity Protocol | Bluetooth |
| Connectivity Technology | Speaker Wire |
| Control Method | Touch |
| Controller Type | Touchpad |
| Customer Reviews | 4.7 out of 5 stars 198 Reviews |
| Enclosure Material | Copper |
| Frequency Response | 120 hertz |
| Is Waterproof | False |
| Item Dimensions D x W x H | 19.7"D x 16"W x 16.6"H |
| Item Weight | 34.2 pounds |
| Manufacturer | Klipsch |
| Model Name | R-121SW |
| Model Number | R-121SW |
| Mounting Type | Floor Standing |
| Number Of Circuits | 1 |
| Number of Audio Channels | 5.1 |
| Number of Items | 1 |
| Number of Power Levels | 1 |
| Power Source | Corded Electric |
| Series Number | 12 |
| Speaker Maximum Output Power | 400 watts |
| Speaker Size | 12 inches |
| Speaker Type | Subwoofer |
| Specific Uses For Product | Television, Home Theater, Movie Theater |
| Subwoofer Connectivity Technology | Wired |
| Subwoofer Diameter | 12 inches |
| UPC | 743878046786 |
| Unit Count | 1 Count |
| Warranty Description | 5 year manufacturer |
| Warranty Type | Limited |
| Water Resistance Level | Not Water Resistant |
| Wireless Technology | Bluetooth |
| Woofer Diameter | 12 inches |
A**R
Impressive
I had just returned a more premium branded sub that cost 3 times as much. This blows that out of the water! Definitely worth it. I was highly surprised. Has plenty of power and sound is deep and rumbling like thunder.
J**F
Lightweight, good performance, rumbles the lows but with control
I don't have the world's best back so the light weight of this subwoofer relative to its size and performance was appealing. It has good extension and can reproduce quite low frequencies, though its EQ has a hump at about 55hz. You can EQ that out or just enjoy it, nobody is going to make you stop! Group delay is good for its size and rear-ported construction as well, better even than some vaunted performers in its on sale price range. Ample dynamic range for cinematic low frequencies and when dialed in, it has a lively and relatively quick low frequency reinforcement for music as well. I pair mine with Klipsch RP-600m (first gen, love them) and set the crossover to reinforce from about 60hz down. Its loudness has been more than enough for my space, it can overwhelm the living room it is in when movies rumble! Feel it moving that low low air into the kitchen and other rooms even. But, to be maximally fair, if you are in a very large room you might want to consider a larger diameter speaker model or perhaps a higher output unit. I've had zero complaints about it's output but it is somewhat conservative compared to the Reference Premiere subs and some competitors, and it has rock solid DSP limiting that stops it from exceeding its capabilities. In my personal use even with bass impact action films I have not met its limits!
F**G
A lot of bass for the average home.
Suitable for an arena or other large venue. It's really too much for a home. I personally like thundering bass, but my partner got tired of the overwhelming thumps and thuds and now we have the bass dialed way back. I would have been better off buying this bad boy's little brother.
W**M
Pleasently Surprising Oomph
Great sub! Connected this baby to my other Klipsch speakers via the sub out port and it worked instantly. (I did have to buy a separate insulated sub wire as this product does not come with one) I was able to get this on sale for 50% off and for that price it's amazing! The subwoofer is larger than expected, but I'm considering that a good thing in the end. (No need to upgrade in the future for me) The adjustable sound allows for subtle bass or wall shaking bass. All and all, this was more than I could have expected for the price!
K**T
Klipsch has the reputation of being phenomenal - because they are.
Amazing - Did not realize how poorly my other Onkyo sub was responding, especially to deep bass when watching an action movie. It used to rattle and pop during those scenes - this Klipsch handles it like a champ. So much clearer and forceful. It also sounds great with music - although most of what I listen to doesn't have a deep, driving bass. Would definitely buy it again should the need arise.
S**S
Decent Beginner sub
This is a very boomy bass. It is lacking power to keep up with the bookshelf speakers I had it painted with. The subwoofer also doesn't get very low. . I would not recommend this subwoofer as the previous models can be found for mush cheaper and have very similar specifications. It was until I purchased this sub that I realized what I wanted out of a sub. If you want to get down deep and feel it, this sub will not do that. This sub is load and will rattle your house but the range is just lacking the satisfaction of 20hz that you can feel in your body instead of just around you. With the 200w rms you will feel the power taper off way too early. The subwoofer is very easy to setup and has life connection. I just set it to 80hz and adjusted the gain to blend with my speakers, took about 5 minutes to setup whis is very simple in comparison to some of the higher end subwoofers. This subwoofer would be good as a starter sub but know for someone who has experienced good deep bass.
A**L
Very happy with it
Massive upgrade from my previous 12” powered sub. Looks great and feels very solidly built. The sound is great. For the price I could not ask for more. Has far more than enough power for demanding movie soundtracks and music. Might buy a second one to use one on each side as speaker stands for my floor speakers.
J**E
Probably the best 12 inch powered sub under 700$
Probably the most bang for the buck for a powered 12 inch sub. The finish could be better. Be advised there are no high level outputs or inputs (not a problem for me)
J**A
Best sub I ever had so far
Thank you Klipsch, very very powerful sub best I ever had. Budgeting for a second one
K**D
High Power Bass for Home Theatre or Stereo Systems
Great product I have four of them ✔️
E**O
Excelente produto
Estou usando esse subwoofer em uma sala de 40m2. Ele tem a presença do subgrave muito nítida e forte. Mesmo em volumes baixos. Toca muito bem, subwoofer de impacto, muito top mesmo.
高**之
故障してたので、返品した。
故障してたので、返品した。
D**O
Grave absurdo
Linda caixa, com potência e clareza excelentes. Preencheu o som da sala perfeitamente. Vale a compra!
Trustpilot
1 month ago
3 days ago