SVS SB-4000 13.5" 1200W Sealed Box Subwoofer

$1,799.00 OR

Color: Black Ash - In Stock

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Model: SB4000BA UPC: 856677007404 Item: 2294

SVS SB-4000 13.5” 1200W Sealed Box Subwoofer Overview

Music lovers and movie buffs agree, deep impactful bass adds an unparalleled layer of excitement to your media. The SVS SB-4000 13.5” 1200W Sealed Box Subwoofer will unleash the sonic power hidden inside your favorite tunes and films. This easy to set up, heavy duty, compact, sealed box subwoofer delivers 1,200-watts of clean, defined booming bass to you your home entertainment system. Featuring a high resolution Audio DSP, the SB-4000 has the most advanced subwoofer processor available resulting in accurate audio reproduction. This subwoofer delivers clear distortion free bass without drowning out other frequencies of your soundstage. Add some boom to your room with the SB-4000 subwoofer.

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Product Information

Unparalleled Low Frequency Depth, Power, and Detail

Chest-thumping slam and extreme low frequency extension with pinpoint accuracy and refined musicality – a level of subwoofer performance not seen at this price before. The SB-4000’s sophisticated DSP amplifier, innovative driver, and a sealed box design master room gain and command a space with deeper bass and higher output levels than what is typically possible from a subwoofer of its size. A top choice for audiophile music or home theater systems, the SB-4000 sets all performance benchmarks for a subwoofer and leaves larger and more expensive subs trembling in its wake.

Rated conservatively at 1,200 watts RMS, and 4,000+ watts peak power, the 4000 Series Sledge STA-1200D amplifiers use an efficient Class D design combined with fully discrete MOSFET output and a sophisticated Analog Devices DSP engine. The result is a level of effortless power and advanced processing not available from any other subwoofer manufacturer.

High Current Output of Discrete MOSFETs with Efficiency of Class D Amplifier

Combines the efficiency of a Class D amplifier design with the ability to move massive amounts of current through the fully discrete MOSFETs enabling immense low frequency output and precise driver control. Put simply, outstanding real-world subwoofer performance at all drive levels.

Sophisticated 50Mhz High Resolution Analog Devices Audio DSP

Most advanced digital processor ever used in a subwoofer maintains pinpoint accuracy and pristine sound quality through advanced in-room tuning, optimized frequency response curves, powerful DSP controls, and more.

Room Gain

Maximizes the subwoofer’s ability to take control of a room and benefit from the acoustic potential of the space it occupies by tailoring the roll off slope. The effect is accurate frequency response with staggeringly deep in-room extension – often as low as 10Hz - without the “boominess” commonly associated with room gain.

Advanced Limiting

Allows the amplifier to deliver all the way to the limits of its rated power and maximize on the driver’s potential with massive output and no distortion.

Active Power Factor Correction (PFC)

Serves as a line conditioner, surge suppressor, and voltage regulator letting the amplifier deal with wide voltage fluctuations and ensuring the subwoofers operate flawlessly on any household circuit no matter how unstable the incoming current.

An isolated circuit creates a vanishingly low noise floor by eliminating the potential for ground loop hums from outside components resulting in absolute sonic transparency.

Legendary SVS Output and Control

SVS 4000 Series drivers handle every watt of the Sledge STA-1200D amplifier’s power with precision and control to produce room energizing SPLs and effortless low frequency extension with pinpoint accuracy at all drive levels.

  • Dual ferrite magnet motor assembly weighing nearly 40lbs generates immense magnetic force and excursion of the 13.5-inch driver to produce massive low frequency output well below the limits of human hearing.
  • Edge wound voice coil with eight-layer aluminum flat wire minimizes distortion and power compression while providing excellent heat dissipation and linearity ensuring precise control.
  • Lightweight and rigid composite cone with premium glass fiber dustcap generate massive output with pinpoint accurate frequency response.
  • Proprietary injection molded gasket and long-throw parabolic surround ensure longevity and allow extreme excursion and SPLs.

Easiest Way Ever to Manage Subwoofer DSP and Control

Groundbreaking smartphone app works with Apple iOS and Android devices to unleash the full depth, force, and nuance of the 4000 Series subwoofers by controlling all DSP functions including: volume, parametric EQ, low pass filter, phase, polarity, room gain, port-tuning, custom presets, and system settings.

  • Connects via Bluetooth for convenient control even when subwoofer is out of sight.
  • 3-band parametric EQ controller allows precise adjustments for frequency slope and Q factor down to the single Hz level with four different slopes, so users can improve performance by eliminating peaks, nulls and other room issues.
  • Stores 3 custom presets for movies, music and other listening experiences such as sports or gaming.
  • 2-way feedback shows updates in real time on both the app and subwoofer interface.

Acoustically Inert and Rigidly Braced

Inlaid front panel display, rounded edges, and a curved metal grille on the 4000 Series cabinet give it a refined yet commanding look that blends visually with home theaters and high-end audio systems.

  • Double thick 2-inch MDF front baffle and rigid internal bracing to support the massive drive unit and to ensure an acoustically inert environment.
  • Highly reinforced internal design and acoustic insulation eliminates all coloration or resonance from the cabinet, even when the deepest low frequencies are played at reference volume.
  • Protective, non-resonant steel mesh grille and custom elastomer feet for reducing noise artifacts within a room.

Product highlights

  • High-performance sealed cabinet subwoofer
  • 1,200-watt continuous Class D design with 4,000+ watts of Peak Power
  • Adds powerful, deep, clean bass to your home music system 
  • Massive 13.5 driver delivers deep, powerful bass while eliminating distortion
  • Available in black ash and piano gloss black finish options
  • XLR and RCA stereo input/output 
  • IR remote included
  • SVS App works with both iOS and Android operating systems.
  • SVS SB-4000 Weight:  102.3 lbs
  • SVS SB-4000 Dimensions ( W x H x  D): 17.8” x 18.3” x 20.9”
  • Warranty: 5-year (World Wide Stereo is an authorized dealer for all brands we sell)
  • World Wide Stereo 60-day guarantee and product support

Powerful bass for all your entertainment

The SB-4000 features an advanced Digital Signal Processor (DSP) ensuring deep and powerful bass, with no distortion, no matter how loud or quiet your volume. The sealed cabinet features an extra think, resonant-resistant MDF front baffle and rigid internal bracing to eliminate vibration and sound coloration. The result is deep and articulate bass that you can hear and feel.

Easy Setup

Adding complex bass to your home audio setup doesn’t have to be complicated. Setting up the SB-4000 is as easy as connecting a single RCA subwoofer interconnect cable from your AV receiver “SUB 1” output to the SB-4000’s “LFE” line level input. If you use preamp and power amps you can use the Line Level Connection on the back of the subwoofer.

The SVS App

Take control of your subwoofer with the SVS Bluetooth DSP control app for iOS and Android. The free app lets you control device volume, parametric EQ, low pass filter, phase, polarity, room gain, custom presets and system settings. It also lets you choose between three custom presets that make it easy for you to get the best sound based on your room’s floor plan.

Meet SVS

SVS was founded more than 15 years ago by a group of audio enthusiasts who wanted to develop exceptional home audio at a reasonable price. Our friends at SVS develop dynamic sounding home audio equipment that combines cutting edge technology, precision engineering, and extensive testing. The result is high performance audio equipment that doesn’t break the bank.



  • Weight: 102.3 lbs.
  • Dimensions (H x W x D): 18.3" x 17.8" x 20.9"
  • Amplifier power: 1,200 watts continuous power/4,200 watts peak dynamic power
  • Driver: Proprietary 13.5" 4000 Series driver
  • Frequency response: 19 - 310Hz ± 3dB
  • Maximum low frequency output: 126.8dB @ 32Hz 1/8 space 1m

What's in the Box

What's in the Box:

  • SB-4000 13.5" 1200W Subwoofer


We'd love to hear your thoughts! Please leave a review.

Customer Reviews for SVS SB-4000 13.5" 1200W Sealed Box Subwoofer

4.7 / 5.0
60 Reviews
5 Stars
4 Stars
3 Stars
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1 Star
Rated 5 out of 5
Love It!
I upgraded from the Klipsch SW-450 Subwoofer to the SVS SB-4000, and the difference is amazing -- But of course it would be.
The bass even comes through on the old TV shows, and listening to music is very nice. I'm using the Yamaha RX-A1080 AVR to push a pair of Monitor Audio Silver 8-5Gs in the front, with the matching Monitor Audio Silver Center 5G. The rears are the Polk Audio LSi M 703 - Bookshelf speakers. I got my speakers at the end of production to cut down on cost , so they all are discontinued models at this point, but they still sound good (to me anyway). The Klipsch sub went out on me, and it made no sense to get something mediocre -- So I broke down and got the SB-4000. It may have been alittle painful financially, but the sound that it produces definitely helps soothe the pain.
I Love It!
February 11, 2023
4 months ago
Rated 5 out of 5
SB4000…Love it!
After trying several locations and settings, this sub performs perfectly and integrates well with my JBL Studio 580’s up front, with the 520c center and the 570’s behind. Driving everything with just a Sony STRDN1080 home theater receiver. This fills a 22x20 room with 8ft ceiling very well. I love the app for this sub. The presets are convenient for switching between music and movies. Rock on!!!
December 18, 2022
Originally posted at
Rated 5 out of 5
After a long wait finally my sb4000 arrive, very excited at first time. But at first month not work good for me, the sound far from what i expected. Low volume, poor bass, not blend with my towers. I did measurement with REW+UMIK, i got "almost" flat in my room, but i not happy with it. In fact i almost sell this subwoofer (i'm glad i don't do this). What's wrong? because i try to make the graph flat that is my mistake (doing eq down the peaks frequency). Refer to the words from Ed Mullen (Senior Director SVS, thank you) "peaks/nulls are normal", i doing the opposite way with the eq, i let the peaks and eq up the nulls. is it flat ? no. But guess what? it makes the subwoofer from zero to hero. yes the winner!! Now my sb4000 sound beyond what i expected, very powerfull but dissapear in my room and blend with my towers, even with my high sensitivity tower speakers (klipsch rf7iii), easily play around 110-115db. Now i can clearly hear bass at low volume even with poor quality recording cd's (mostly rock/metal genre from 90's). Yes now i'm very happy with my sb4000, big smile on my face, enjoy every single track music with new experience. A single sb4000 is more than enough at my room. My room are 5.2 m x 4.2 m, mostly run with -11db volume on subwoofer, signal 2 volt from my preamp with XLR cable. Thank you so much for all svs member for making this subwoofer at competitive price, you are doing very good job.
May 22, 2022
Originally posted at
Rated 2 out of 5
Expected more for the price.
This subwoofer exceeds at sub bass and works great for music however for watching movies It felt for me that midbass is lacking, the filters didn't helped much. I expected way more jumping from a pair of budget subwoofers that cost 1/8 of this one each. It didnt really pair well with focal aria 906 bookshelf speakers and it felt like mid tones, high tones, sub bass and there was an empty hole in the mid bass region from 80hz to around 40hz. When I hooked it with my old subwoofer it was amazing but I expected it to exceed at all bass frequency rather than only sub bass. I two rooms, three amplifiers and three pairs of speakers which were focal arias 906, audiovector qr1, tannoy xt8f. Bass fixed itself after I changed fronts at tannoys to big and changed their crossover to 40hz but again I expected that subwoofer will take care of that range...
May 7, 2022
Originally posted at
Rated 5 out of 5
Love it!
My last sub, which died quietly last month, was a REL Stadium III, which I had used for 15 years. REL customer service is non-existent, so I started researching the state of the art in sub woofers, with the filter that I have a 15 by 15 room.... Based on numerous reviews, I chose to go with the SB4000, and couldn't be happier with my decision. My system is two channel, all McIntosh tube equipment, and the SB4000 blends seamlessly with my Mac gear and Nola speakers. The SB4000 really brings vocals to life, gives more punch to drum hits, and power to bass lines, truly waking up the music. My system sounds better than it ever has! The SB4000 is a beautiful piece of equipment (piano black for me), easy to set up with the phone app., and just flat works! Treat yourself to one - you won't regret it. Tim
March 11, 2022
Originally posted at


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