---
product_id: 20037999
title: "KEF R400GW R400b Front Firing Powerful Subwoofer - Gloss White (Single)"
brand: "kef"
price: "$359.64"
currency: USD
in_stock: false
reviews_count: 8
url: https://www.desertcart.us/products/20037999-kef-r400gw-r400b-front-firing-powerful-subwoofer-gloss-white-single
store_origin: US
region: United States of America
---

# force-cancelling tech 14" compact size 9" dual drivers KEF R400GW R400b Front Firing Powerful Subwoofer - Gloss White (Single)

**Brand:** kef
**Price:** $359.64
**Availability:** ❌ Out of Stock

## Summary

> 🎶 Feel the Beat Like Never Before!

## Quick Answers

- **What is this?** KEF R400GW R400b Front Firing Powerful Subwoofer - Gloss White (Single) by kef
- **How much does it cost?** $359.64 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/20037999-kef-r400gw-r400b-front-firing-powerful-subwoofer-gloss-white-single)

## Best For

- kef enthusiasts

## Why This Product

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

## Key Features

- • **Quick Response:** Enjoy lightning-fast bass response that keeps up with your favorite tracks.
- • **Unleash the Bass:** Experience deep, rich sound with dual 9-inch drivers.
- • **Compact Powerhouse:** Fits seamlessly into any space without compromising on performance.
- • **Elevate Your Sound:** Transform your audio experience and impress your guests with powerful low-end.
- • **Precision Engineering:** Computer-optimized cabinet design minimizes distortion for pure audio bliss.

## Overview

The KEF R400GW R400b Front Firing Subwoofer features dual 9-inch ultra-low distortion drivers and advanced force-cancelling technology, all housed in a compact 14-inch cabinet designed for optimal sound performance. Perfect for audiophiles seeking powerful bass without sacrificing space.

## Description

If you're looking for premium speakers to fill your home theater and handle a variety of musical genres, you can't do much better than the KEF R Series. Transparent. Well-rounded. Superb rendering and imaging at all volume levels. A powerful-yet-compact subwoofer."" states High-Def Digest in a May 2016 review of the R400b. Measuring a compact 14 inches deep and wide, the R400b delivers a surprisingly massive low-end with an incredibly quick response. The subwoofer's twin 9 inches bass drivers perform with little excursion, meaning your bass frequencies hit hard and can cease instantly.

## Features

- The R400b uses two ultra-low distortion 9 inches bass drivers, each braced with force-cancelling technology within the cabinet to allow both drive units to operate more effectively, giving greater definition to low frequencies.
- The shape and bracing of the cabinet are computer optimized to minimize secondary radiation from the cabinet walls and distortion from standing waves.
- Measuring a compact 14 inches deep and wide, the R400b delivers a surprisingly massive low-end with an incredibly quick response.

## Product Details

- **Brand:** KEF
- **Speaker Maximum Output Power:** 250 Watts
- **Mounting Type:** Wall Mount
- **Speaker Type:** Computer, Subwoofer
- **Recommended Uses For Product:** All,Volume

## Images

![KEF R400GW R400b Front Firing Powerful Subwoofer - Gloss White (Single) - Image 1](https://m.media-amazon.com/images/I/41I5RMnUjvL.jpg)
![KEF R400GW R400b Front Firing Powerful Subwoofer - Gloss White (Single) - Image 2](https://m.media-amazon.com/images/I/91mKbRt1-zL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Finally! A worthy subwoofer
  

*by S***Z on Reviewed in the United States on July 30, 2017*

Finally found a worthy subwoofer for my man-cave. The room is 12x13 ft with 11 foot ceilings. I've had 3 subs in this room so far that I didn't like.SVS SB2000, Velodyne 80-MINIVEE and Definitive Technology SC6000 .The 12 inch SVS (500 W RMS / 1,100 peak) was clean and deep but not powerful or loud enough and the box was already quite big so their SVS 13 inch and 16 inch subs wouldn't fit space wise in this room.  It sounded better than the more expensive Def Tech.The 8-inch Velodyne didn't go low enough or have enough power (even though specs said it was 1000 watts RMS, 2000 W peak). I don't believe these figures after hearing KEF.The Definitive 9-inch sub had power (1500 W) but was very dirty and boomy.  I could't stand it.
  
KEF R400b Front Firing Powerful Subwoofer - High Gloss Piano Black (Single)







  
  
    Finally, the twin-9 inch (2 x 500 W) R400b KEF has the sound I was looking for: clean, tight, powerful bass. It sounds great with music and movies. If the room was bigger, I'm sure I would need 2 of these, but one is sufficient for this small room. I can feel the bass more with this one than either of the previous 3 subs mentioned.  The box size is smaller than the SVS and about the same as Definitive. It's amazing how good this sub is for the size. Granted, it is more expensive (paid $1699) than all the previous ones (at the time I paid $699 for Velodyne, $699 for SVS, and $999 for Definitive).  I would have been better off to buy this one to start.  There has been a learning curve in finding this high quality speaker company. I also recently replaced the Definitive side and centers for KEF speakers. KEF is amazingly good.

### ⭐⭐⭐⭐⭐ 







  
  
    Compliments R200 and LS50s
  

*by G***Y on Reviewed in the United States on February 1, 2020*

KEF LS50s for the front and a R200 for the center; R100s for surround. Amazing looking sub but I couldn't justify the purchase at $1700. The current $1000 price is more in line with the performance, but you're getting the best looking sub on the market. I set the crossovers at 100 for the LS50s/R100s and left the R200 at 80. LPF LFE at 120.KEF's recommended settings on the sub measured initially at 80dB SPL, so I went a notch or two down to have it float around 75dB SPL.This sub doesn't vibrate even if it is shaking the entire room. Produces a really nice tone as well. I'm happy with the purchase at $1000.

### ⭐⭐⭐⭐⭐ 







  
  
    You can’t find a better match for your LS50s
  

*by K***K on Reviewed in the United States on January 3, 2020*

This thing is mind blowing, the bass is extremely tight and lends itself very well for music. I use this with a kef LS50 and bloody hell they sound good together. It blends seemlessly with the LS50 extending its low range with tightness and clarity. It is not a house rattling subwoofer, this is more finesse than pure power. For the LS50 set your crossover to 80hz this is where the LS50 response dips to less than +- 3Db and beyond this the LS50 dips to +- 6Db.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-10*