SVS SB-4000 Subwoofer

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Please Note: This item is in stock and ready for despatch. Please note that it may not be on demonstration or available for immediate in-store collection.

Priced from $3,779.00 (Normally Regular Price $4,199.00 )

Front-Firing 343mm (13.5") Heavy Duty Woofer

Sealed Cabinet For Deep, Tight Bass & Positioning Flexibility

Massive 1,200 Watts Of Continuous Power

Frequency Response Unbelievable 19 to 310Hz

App Controlled, Designed In The USA

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About the SVS SB-4000 Subwoofer

With trickle down technology, the SVS SB-4000 Subwoofer is smart in its operation and devastatingly brutal in its execution. Smaller than its ported siblings this sealed box (SB) model is lighter on its feet but still plumbs the depths all the way down to 19Hz. Bass this tight and badass should be handled with extreme care. Enjoy.

A top choice for home theatre and audiophile music systems, the SB-4000 subwoofer delivers massive SPLs and extreme low frequency extension that will astonish even the most discerning listeners. A high-excursion 13.5-inch driver unleashes immense sonic energy while maintaining pinpoint control and accuracy from a 1,200 watts RMS, 4,000+ watts peak power amplifier featuring fully discrete MOSFET output and Analog Devices most advanced audio DSP. Precise tuning for the SB-4000 is enabled from a subwoofer DSP smartphone app with custom presets.

Chest-thumping slam and low frequency extension below the threshold of human hearing, with refined musicality – a level of subwoofer performance not seen at this price before. The SB-4000 subwoofer’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. An ideal option for reference quality bass in audiophile music or home theatre systems, the SB-4000 sets all performance benchmarks for a subwoofer and leaves larger and more expensive subs trembling in its wake.

SVS SB4000 Subwoofer

Unparalleled Low Frequency Depth, Power and Detail

The SVS SB-4000 powered subwoofer demolishes all preconceived notions about subwoofer performance and technology by taking command of any room with deep, effortless bass and adding visceral energy to every listening experience. With trickle down technology from the 16-Ultra Series, named top subwoofers in the world by nearly every audio publication and industry group in 2017, the SB-4000 obliterates expectations and delivers a level of unrivaled subwoofer performance only available from SVS.

Jaw-Dropping Bass Extension: The SVS SB-4000 combines seismic power and fathomless low frequency extension you can feel with refinement and musicality that suspends your sense of disbelief. With trickle down technology from the 16-Ultra Series, named top subwoofers in the world by nearly every audio publication and industry group in 2017, the SB-4000 crushes expectations and delivers a level of unrivaled subwoofer performance only available from SVS.

Legendary SVS Output & Control: The SB-4000 subwoofer driver delivers on the full potential of the Sledge STA-1200D amplifier’s immense 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 18kgs generates immense magnetic force and excursion of the 13.5-inch (343mm) driver to produce massive low frequency output well below the limits of human hearing
  • Edge wound voice coil with eight-layer aluminium 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 fibre dustcap generates massive output with pinpoint accurate frequency response
  • Proprietary injection molded gasket and long-throw parabolic surround ensure longevity and allow extreme excursion and SPLs

Sledge Amplifier, Massive Output, Sophisticated DSP: Rated conservatively at 1,200 Watts RMS, and 4,000+ Watts peak power, the SB-4000 Sledge STA-1200D amplifier uses 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 powered subwoofer manufacturer.

High Current Output of Fully Discrete MOSFETs with Efficiency of Class D Amplifier: Efficiency of a Class D amplifier with the ability to move massive amounts of current through the fully discrete MOSFETs enabling immense output and precise control for 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, optimised frequency response curves, powerful DSP controls and more.

Active Power Factor Correction (PFC) & Ground Loop Isolation: 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.

Problems With Vibrations From Your Subwoofer? Try This: To isolate your subwoofer from the floor and provide improved bass performance while reducing floor and wall vibrations, noise artefacts and complaints from neighbours or roommates, choose the SVS SoundPath Subwoofer Isolation System (4 Pack).

Smartphone App

Groundbreaking smartphone app works with Apple iOS and Android devices to unleash the full depth, force and nuance of the SB-4000 subwoofer 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 Sealed Box Cabinet Design: Inlaid front panel display, three front-firing, high-flow bass ports, rounded edges and a curved metal grille on the SB-4000 cabinet give it a refined yet commanding look that blends visually with home theatres and high-end audio systems. It’s sealed cabinet design results in tighter, more musical bass and makes it significantly more compact than ported box subwoofers with similar specs.

  • Double thickness 50mm (2") 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 artefacts within a room

In The News

"The SB-4000's bass was deep and powerful, bass transients were quick, and there was no thickening or bloat. Impact and dynamics were visceral. It enlarged the soundstage. A reference-grade subwoofer that doesn't merely dish out room-rattling home theater effects, it's also a very musical sub. I’ve never heard bass like this in the CNET listening room! Highly recommend it." CNET

Main Features & Specifications

  • Design: High-performance SVS 4000 Series Subwoofer
    • Driver: Optimised for sealed cabinet design
    • Proprietary 13.5” (343mm)
    • Driver with finely tuned Overhung Motor Configuration
    • 19.5kg Woofer with 17.1kg for the motor
    • Overhung 52mm Xmax, 76.2mm Xmech precision aligned excursion
  • Voice-Coil: 8-layer aluminium flat wire edge wound 76mm (3”) voice coil for ultra-low distortion, efficient heat dissipation, exceptional linearity and nearly zero power compression
  • Two massive, dedicated toroidal ferrite magnets generate unparalleled levels of magnetic force to drive the highest levels of excursion, SPL, and start/go power for the deepest and most authoritative bass possible
  • All-new High density FEA-optimised cast aluminium basket provides unequaled levels of rigidity, tensile strength, and energy transference available from a subwoofer
  • Dual 24-strand copper and Nomex composite high-temperature leads woven through the suspension provide a pristine electrical connection from the amplifier to the voice coil
  • Premium glass fibre laminated dustcap and reinforced and vented paper-composite cone sub-structure ensure a light, ridged, and neutral radiating surface
  • Precision machined motor elements and narrow tolerance suspension parts produce unmatched linearity at full excursion for exceptionally tight and fast output, even at reference volumes
  • Extreme oversized low carbon vented steel U-yoke and top plate provide superior cooling and improved magnetics for maximum performance and efficiency
  • Copper ring shorting sleeve reduces gap induction and distortion, enhances thermal conductivity
  • Terminals: Nickle-plated high-tension spring terminals
  • Surround: Proprietary injection moulded gasket and parabolic PBR extreme-excursion surround maintains ideal pistonic motion for pinpoint accuracy and control
  • Steel Components: Low carbon 1008 steel components with black electrophoresis plating


  • Amplifier: Massively powerful Sledge 1,200-Watt continuous Class D design with 4,000+ watts of Peak Power
  • Filters: Unmatched intelligence from user adjustable low pass, phase, polarity and room gain compensation with three parametric EQs and port tuning (Ported models only) for absolute best alignment with speakers and optimised performance in any room
  • Control App: Groundbreaking SVS Bluetooth DSP control app for iOS and Android devices with three user presets allow custom tuning for every room and system
  • Class D Amp: High efficiency cool-running Class D switching topology with massive 32 Amp 600 Volt MOSFET’s result in lower EMI and highest efficiency while providing effortless power to produce SPLs and low frequency output with pristine clarity well beyond reference listening levels
  • DSP: High resolution 50Mhz Analogue Devices Audio DSP with double precision 56bit filtering is most advanced subwoofer processor available for perfect audio reproduction
  • Power Factor Correction (PFC): Pre-regulates mains to solid 360V DC regardless of mains voltage or quality so the sound quality never falters no matter what’s coming out of the wall
  • Active PFC: Lowers average current and smooths mains input current allowing for 1200W output from a standard 15A mains circuit
  • Connections: XLR and RCA stereo input/output with ultra-wide input voltage for consumer and professional audio applications
  • Display: Convenient front-mounted display featuring new Intelligent Feature Control (IFC) with bright blue dimmable/defeatable 8-digit LED front display
  • Custom EQ and DSP Limiter Settings: Tuned specifically for the SB-4000 ported cabinet design
  • Trigger: Auto/On and 3-30V AC/DC trigger for Maximum Installation Convenience
  • Input Impedance: 22kohm (unbalanced RCA)/ 22kohm (balanced XLR)
  • Standby: Green 0.5-watt low standby power consumption
  • RoHS Compliant: Lead-free construction, world-wide safety certifications

Free SVS App 

  • The most powerful and flexible Bluetooth controlled subwoofer DSP app, works with both iOS and Android operating systems
  • Easiest and most convenient way to adjust crossover frequencies, parametric EQ, polarity, room gain and all other bass management functions
  • Three convenient custom presets allow for perfect tuning in any room or system, from your favourite seat
  • Single tap adjustment for controlling variable port tuning with standard, extended and sealed modes
  • Unique bidirectional feedback shows adjustments in real time on both app and subwoofer interface
  • Easy-to-follow tutorial provides clear guidance for all functions

Other Stuff

  • Frequency Response: 19-310 Hz +/- 3 dB
  • Roll-off Slope: Specifically optimised to take maximum advantage of available room gain
  • 2-meter ground plane away from reflective structures (quasi-anechoic)
  • Finish: Piano Gloss Black
  • Feet: Screw-in rubber feet
  • Grille: Protective non-resonant steel mesh grill
  • Remote Control: IR remote control included
  • Feet: Elastomer feet included
  • Power Cord: Detachable IEC Power Cord - Can be easily upgraded
  • Manual: SB-4000 Subwoofer Manual
  • Quick Start Guide
  • Please Note: To isolate your subwoofer from the floor and provide improved bass performance while reducing floor and wall vibrations, noise artefacts and complaints from neighbours or roommates, choose the SVS SoundPath Subwoofer Isolation System (4 Pack)
  • Cabinet Dimensions (WxHxD without grille): 453 x 465 x 471.3mm
  • Cabinet Dimensions (WxHxD with grille): 453 x 465 x 530mm
  • Shipped Dimensions: 598 x 598 x 712mm
  • Available Colours: Black Ash or Gloss Black
  • Weight (unboxed): 46.4kg
  • Shipping Weight: 53.45kg
  • Manufacturer's Warranty: 5 years

Note: Features & Specifications Subject To Change Without Notice. E&OE

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