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SVS PB-4000
Setting all performance benchmarks for ported subwoofers in its class, PB-4000 unleashes heart-pounding output and infrasonic deep bass extension with pinpoint accuracy. Brutally powerful yet subtle and nuanced, you’ll never think of bass the same way again.
Jaw-Dropping Bass Extension and Output with Pinpoint Control and Accuracy
The SVS PB-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 PB-4000 crushes expectations and delivers a level of unrivaled subwoofer performance only available from SVS.
High-Excursion SVS Driver – Legendary SVS Output and Control
The PB-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 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.
Sledge Amplifier – Massive Output, Sophisticated DSP, Advanced Power Management
The PB-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.
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.
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.
Three foam port plugs come standard with the PB-4000 and allow for variable tuning. Each response curve for the three port tuning modes; standard, extended and sealed, is fully configured to the respective mode to achieve balanced and accurate low frequency response with all tuning preferences.
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.
PB-4000 Smartphone App – 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 PB-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 Ported Box Cabinet Design
Inlaid front panel display, three front-firing, high-flow bass ports, rounded edges and a curved metal grille on the PB-4000 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.
- 2-way feedback shows updates in real time on both the app and subwoofer interface
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The PB-4000 delivers jaw‑dropping, room‑shaking low end with precise control — a ported design that reaches down to around 13–16 Hz with remarkably deep bass and low distortion. Reviewers praised its authority, generous headroom from a 1,200W Sledge amp and flexible DSP tuning via parametric EQ and the SVS app (see Audioholics and Audiophilepure). It’s built to perform in music and cinema.
Pros
- Extends to the mid-teens hertz with high SPL capability and low measured distortion, delivering authoritative, tangible subsonic impact.
- Robust Sledge STA-1200D amplification provides huge headroom and slam for demanding music and movie effects without audible strain.
- Comprehensive DSP and app-based controls — parametric EQ, port tuning and room-gain compensation — let you precisely integrate the sub to your room and mains.
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Cons
- Very heavy and bulky (150+ lbs unboxed), so placement and moving require at least two people or furniture sliders.
- Large output and footprint can be overkill in small rooms; users may need to employ room‑gain compensation or sealed/ported tuning to avoid excessive boom.
Sound Quality
93/100
Bass
92/100
Reviewers call it a 'deep bass monster' with flat response to 16 Hz (13 Hz in extended mode) and measured 107 dB at 16 Hz. Audioholics highlights 'clean bass' and 'serious air displacement' with relatively low distortion, supporting a very high score for extension, control and texture for its size.
Dynamics
94/100
Audioholics reports strong transient performance: 'Low-frequency transients such as kick drums were executed with an articulation' and the sub had 'absolutely no troubles getting very loud' without mechanical complaints. These statements indicate excellent macro/micro dynamics, slam and headroom.
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Integration
90/100
Outcomes in the review indicate it 'neatly delineates these different sounds, and there is no confusion at all in bass frequencies' and 'This bass does not linger where it would be audible,' which point to a seamless blend with the rest of the system. The extensive DSP and app controls provide the tools to achieve that blend in-room, and the review reports successful practical results.
Build Quality
93/100
The review describes 'extraordinarily high build quality' and that 'every component of the build of this thing is rock solid.' The heavy driver, robust MDF cabinet and quality finishes in the spec list align with that assessment.
Features Connectivity
91/100
Review notes that 'nearly every aspect of the sub’s performance can be controlled to a remarkably fine degree' and praises the SVS app as the best way to adjust crossover, parametric EQ, port tuning and presets. Connectivity and DSP features are comprehensive and very usable, including front display, remote and app.
Value for Money
84/100
Reviewer calls it 'an expensive subwoofer, but... you are getting your money’s worth' and describes it as 'well-rounded' for the cost. Positive performance-to-price language is present but not the 'no-brainer' or 'best in class' phrasing required for top marks.
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