SVS SB-4000 13.5" 1200W Sealed Box Subwoofer

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.