---
product_id: 505664823
title: "Klipsch Reference Front-Firing Subwoofer with revamped Spun-Copper thermoformed crystalline Polymer woofers"
brand: "klipsch"
price: "$1688.68"
currency: USD
in_stock: true
reviews_count: 13
category: "Klipsch"
url: https://www.desertcart.us/products/505664823-klipsch-reference-front-firing-subwoofer-with-revamped-spun-copper-thermoformed
store_origin: US
region: United States of America
---

# 400W all-digital amplifier power front-firing driver for flexible placement 12” spun-copper woofer for deep bass Klipsch Reference Front-Firing Subwoofer with revamped Spun-Copper thermoformed crystalline Polymer woofers

**Brand:** klipsch
**Price:** $1688.68
**Availability:** ✅ In Stock

## Summary

> 🎶 Feel the bass, own the room — Klipsch R-121SW redefines your soundscape!

## Quick Answers

- **What is this?** Klipsch Reference Front-Firing Subwoofer with revamped Spun-Copper thermoformed crystalline Polymer woofers by klipsch
- **How much does it cost?** $1688.68 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/505664823-klipsch-reference-front-firing-subwoofer-with-revamped-spun-copper-thermoformed)

## Best For

- klipsch enthusiasts

## Why This Product

- Trusted klipsch brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Universal Compatibility:** Line/LFE inputs guarantee effortless connection with any AV receiver for a flawless home theater setup.
- • **Flexible Front-Firing Design:** Place your subwoofer anywhere in the room without sacrificing deep, room-filling bass.
- • **Seamless Integration Controls:** Low-pass crossover and phase control ensure perfect harmony with your Klipsch speakers.
- • **Precision All-Digital Amplifier:** Delivers 400 watts of high-efficiency power for immersive, true-to-source sound clarity.
- • **Thunderous 12” Spun-Copper Woofer:** Experience ultra-lightweight design with crystal-clear low frequencies and zero distortion.

## Overview

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.

## 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.

Review: 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.
Review: 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!

## 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 subwoofer’s 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| 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 |

## Product Details

- **Audio Output Mode:** Surround
- **Brand:** Klipsch
- **Connectivity Technology:** Speaker Wire
- **Frequency Response:** 120 hertz
- **Speaker Maximum Output Power:** 400 watts

## Images

![Klipsch Reference Front-Firing Subwoofer with revamped Spun-Copper thermoformed crystalline Polymer woofers - Image 1](https://m.media-amazon.com/images/I/51FX7KtCy4L.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: What are the differences between this and the 120sw?**
A: The R-121SW  has an updated woofer driver and a larger batter braced cabinet. It is able to produce a bit more bass and sound tighter.

**Q: When in auto position the led green light remains on even when the amp is off. is this normal?**
A: The subwoofer should shut off after about 15 minutes of no signal from the amp so it will not happen right as you shut the amp off. If the sub is still not going on standby, there may be some noise coming from the amp or wiring between the amp and subwoofer that is keeping the sub from going to sleep. Reach out to our support team through our website if you need further support.

**Q: Can you use a wireless kit with this sub**
A: You can use a 3rd party wireless kit that will connect using rca connections on the back of the sub. We do not make a wireless kit that will work with this subwoofer here. Thank you.

**Q: The product description and information say that this sub is wireless. How does it receive the signal from the receiver? Is there a transmitter, also?**
A: This subwoofer has no wireless function, looks like this is just a error in the listing description. This sub only has RCA wired inputs.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Impressive
*by A***R on June 8, 2026*

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.

### ⭐⭐⭐⭐⭐ Lightweight, good performance, rumbles the lows but with control
*by J***F on June 10, 2025*

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!

### ⭐⭐⭐⭐⭐ A lot of bass for the average home.
*by F***G on July 9, 2026*

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.

## Frequently Bought Together

- 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
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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-02*