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Klipsch

Klipsch Reference R-121SW 12” Front-Firing Subwoofer with revamped Spun-Copper thermoformed crystalline Polymer woofers and an All-Digital Amplifier for Premium Sound in Black

  • Based on 88 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Mar 22
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Features

  • New 12 spun-copper thermoformed crystalline polymer woofers: exceptionally light while providing low frequency response, minimal cone breakup, and degradation-free distortion
  • All Digital Amplifier: The built-in, all-digital amplifier delivers ample power with high efficiency and true-to-source accuracy in reproduction, ensuring maximum efficiency for best-in-class output, detail, and power.
  • Front-firing driver: The high-performance driver provides deep bass and flexible room placement.
  • Low-pass crossover and phase control: Ensures the subwoofers low-frequency tones blend with other Klipsch speakers and establish your ideal level of bass.
  • Line/LFE inputs: Ensure compatibility with the AV Receiver of your choice
  • Durable and Versatile Cabinet Design: A scratch-resistant, reinforced 34 MDF construction with an all-new bracing design creates reduced cabinet vibration.
  • LED Front-Mounted Power Indicator
  • Low-profile grille: offers a chic touch and acoustic transparency.
  • Dimensions: 16.6" H X 16" W X 19.7" D

Description

The Klipsch Reference R-121SW 12” subwoofer features a revamped 12” spun- copper thermoformed crystalline polymer woofer that is exceptionally light and provides low frequency response, minimal cone breakup, and degradation-free distortion. The front-firing subwoofer allows you to place the sub wherever you want in your space, while the all-digital amplifier delivers ample power with Klipsch signature high efficiency.

Brand: Klipsch


Speaker Maximum Output Power: 400 Watts


Frequency Response: 120 Hz


Connectivity Technology: Speaker Wire


Audio Output Mode: Surround


Mounting Type: Floor Standing


Material: Copper


Model Name: R-121SW


Speaker Type: Subwoofer


Special Feature: Digital Amplifier


Recommended Uses For Product: For Televisions


Compatible Devices: Television


Subwoofer Diameter: 12 Inches


Unit Count: 1.0 Count


Surround Sound Channel Configuration: 5.1


Color: Black


Included Components: Speaker


Product Dimensions: 19.7"D x 16"W x 16.6"H


Item Weight: 34.2 Pounds


Is Waterproof: FALSE


Warranty Type: Limited


Number of Items: 1


Control Method: Touch


Wireless Communication Technology: Bluetooth


Speaker Size: 12 Inches


Power Source: Corded Electric


Woofer Diameter: 12 Inches


Water Resistance Level: Not Water Resistant


Audio Driver Type: Bass Driver


Audio Driver Size: 12 Inches


Subwoofer Connectivity Technology: Wired


Number Of Circuits: 1


Number of Power Levels: 1


Series Number: 12


Specific Uses For Product: Television, Home Theater, Movie Theater


UPC: 743878046786


Style: modern


Manufacturer: Klipsch


Shape: rectangular prism


Item Weight: 34.2 pounds


Item model number: R-121SW


Date First Available: May 16, 2022


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Mar 22

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Pleasently Surprising Oomph
Review Image by William William
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! ... show more
Reviewed in the United States on January 6, 2026 by William William
    • 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! ... show more
Reviewed in the United States on June 10, 2025 by Jeff
    • WOW
Excellent subwoofer a definite upgrade from my original sub. Earthshaking bass round and smooth no distortion no baffling. Great buy
Reviewed in the United States on January 11, 2026 by Richard Cumberland
    • 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. ... show more
Reviewed in the United States on December 31, 2025 by Aaron Fledell
    • 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. ... show more
Reviewed in the United States on January 6, 2026 by KenInCLT
    • Awesome
Subwoofer produces loud, deep, undistorted bass. Couldn't be happier with the sound, just two small complaints. It is quite large but also has a nice aesthetic to combat this so not much to complain about here. Second is that mine did not come with a rca cable. Luckily I had one to my existing 10" woofer, but still. Couldn't hurt Klipsch bottom line that much to throw in a basic rca connection cable. ... show more
Reviewed in the United States on December 4, 2024 by Roman
    • Great quality, and awesome sound
Awesome subwoofer, sounds very well and no noise like the other (2) brands I returned this is awesome great quality and sound I would recommend this to anyone who has the Denon 500 series AVR easy installation. Just all around great.
Reviewed in the United States on November 6, 2025 by Amazon Customer
    • Very powerful
Sound amazing, very powerful… too much for my listening room so i did place it on my living room
Reviewed in the United States on January 11, 2026 by Alexander Martinez Gomez

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