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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 86 reviews
Condition: Used - Like New
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Availability: Only 1 left in stock, order soon!
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Arrives Sep 28 – Sep 30
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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: 1.2E+2 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


Vehicle Service Type: Car


Water Resistance Level: Not Water Resistant


Audio Driver Type: Bass Driver


Audio Driver Size: 12 Inches


Subwoofer Connectivity Technology: Wired


Includes MP3 player?: No


Number Of Circuits: 1


Number of Power Levels: 1


Series Number: 12


UPC: 743878046786


Manufacturer: Klipsch


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: Sep 28 – Sep 30

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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Top Amazon Reviews

    • Rattle your teeth loose
Purchased to complement my Klipsch Reference Premiere RP-8000F II speakers. I live in an 850sq apartment and this sub is MORE than adequate. Dare I say, it to big?? Frequency range is 28Hz - 120Hz. Bass is clean, clear and LOUD. (if you want it to be) It sounds so good, it almost rattled my teeth out. You can actually feel the bass. It sounds amazing especially movies in 5.1 surround sound with this speaker and sub combo!!! Metal and rock music sound AMAZING, house music when the beat drops is awe inspiring! I wish the frequency went a little lower to 20Hz but I'm +50 and doubt I could hear that low anyway. lol Few things in life are worth every penny you paid for them and this sub is one of them. Puts a big smile on my face every time I fire my sound system up. ... show more
Reviewed in the United States on December 28, 2024 by Bogy
    • Impressive Performance
Review Image by Eli cohen Eli cohen
The media could not be loaded. The subwoofer sounds great, deep clear bass. I have 2-12” it never distorts I can hear and feel the perfect balance in between the two. The look of this subwoofers is so beautiful and the build quality is amazing, worth trying. I’m sure you’ll enjoy it too.
Reviewed in the United States on January 10, 2025 by Eli cohen Eli cohen
    • Great sound.
Great bass sound. Rattles the walls when my husband is watching an action movie.
Reviewed in the United States on July 12, 2025 by JennS
    • Shakes the whole house!
Review Image by Storm Storm
This is really what I was looking for to replace my 12" Polk with the built in amp. It shakes the whole house and really adds the bass back into my surround sound setup.
Reviewed in the United States on June 26, 2025 by Storm Storm
    • 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
    • Buy Now!
There for about 30 seconds, I was very un-impressed, but then, the movie played a bass sound and WOW! Talk about DEEP, room feeling lows. I’m newer to the home audio game, but I have extensive live audio experience from a “past life.” This woofer feels the room and caries the low end punch that I only could’ve dreamed about in a live venue. It’s definitely tuned beter for tv compared to music, but it still does wonders for music. I recommend the purchase to anyone who doesn’t prefer to listen to boring, dull, flat sounding music like what came from your neighbors busted Sony in the 70s. ... show more
Reviewed in the United States on January 11, 2025 by LApilot
    • Boom. Wow what a low end response. YOU NEED THIS.
Klipsch. Wow. This does have a bit of weight to it but to plug it in and use it - it's easy to set up. This item is perfection in beauty AND performance. I really don't think you can get sound like this anywhere else for the price. This is a side-fire speaker but the cabinet is a decent size for it's function. This really is a great product. I wish I found it earlier. ... show more
Reviewed in the United States on August 7, 2025 by David R.
    • Great Sound
The base is very deep and clean. No vibrations. Excellent sound. Highly recommend. Exceeded expectations. You cant go wrong with this woofer.
Reviewed in the United States on December 19, 2024 by JT

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