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Klipsch

Klipsch Reference Front-Firing Subwoofer with revamped Spun-Copper thermoformed crystalline Polymer woofers

  • Based on 88 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, May 17
Order within 4 hours and 23 minutes
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Size: 12” Woofer


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

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


Audio Output Mode: Surround


Mounting Type: Floor Standing


Enclosure Material: Copper


Speaker Type: Subwoofer


Additional Features: Digital Amplifier


Antenna Location: For Televisions


Subwoofer Diameter: 12 Inches


Color: Black


Is Waterproof: False


Warranty Type: Limited


Control Method: Touch


Speaker Size: 12 Inches


Woofer Diameter: 12 Inches


Water Resistance Level: Not Water Resistant


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


MP3 player: No


Controller Type: Touchpad


Unit Count: 1.0 Count


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


Item Weight: 34.2 Pounds


Compatible Devices: Television


Compatible with Vehicle Type: Car


Power Source: Corded Electric


Is Electric: Yes


Brand: Klipsch


Model Number: R-121SW


Model Name: R-121SW


Built-In Media: Speaker


Warranty Description: 5 year manufacturer


Number of Items: 1


Series Number: 12


UPC: 743878046786


Manufacturer: Klipsch


Speaker Maximum Output Power: 400 Watts


Number of Power Levels: 1


Frequency Response: 120 Hz


Number of Audio Channels: 5.1


Connectivity Technology: Speaker Wire


Wireless Technology: Bluetooth


Subwoofer Connectivity Technology: Wired


Connectivity Protocol: Bluetooth


Audio Driver Type: Bass Driver


Audio Driver Size: 12 Inches


Number Of Circuits: 1


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, May 17

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
Style: Single
Review Image by 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
    • Where has this subwooofer been all my life?!
Style: Single
This big boy is a beast!!! Nice, clean bass that doesn't even have to be turned up high to rumble you out of your socks! This has been my favorite subwoofer ever, AND it looks nice! It gets 5 stars with ease!
Reviewed in the United States on March 3, 2026 by Amazon Customer
    • Great subwoofer
Style: Single
Excellent Speaker with superb Lows.
Reviewed in the United States on February 23, 2026 by Kwame Jones
    • Very happy with it
Style: Single
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
    • Lightweight, good performance, rumbles the lows but with control
Style: Single
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
    • Its a little big make sure you ask a professional on placement
Style: Single
Review Image by Emmanuel
Absolutely incredible, I was deciding on 2 small vs 1 big and this one take it by far. My theater is 40 ft from the main house and any volumen over 75% will make the house vibrate, it's a powerfully equipment. Looks a little bulky but for the value I am over satisfied .
Reviewed in the United States on February 26, 2026 by Emmanuel
    • two r121sw or 1 rp1200sw price matters
Style: Single
rear andf ront firing ports are important!
Reviewed in the United States on January 9, 2026 by pbl57lsu
    • WOW
Style: Single
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

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