13.5" High Output Woofer: The front-firing 13.5" high output woofer of the SVS PB-4000 powered subwoofer pumps out deep and powerful bass with low distortion, for smooth and accurate performance on music and movies soundtracks. The woofer features a lightweight and rigid composite cone with a premium glass fiber dustcap to generate massive output with pinpoint accurate frequency response. A dual ferrite magnet motor assembly weighing nearly 40lbs generates immense magnetic force and excursion of the 13.5" driver to produce massive low frequency output well below the limits of human hearing. An edge wound 3" voice coil with an eight-layer aluminum flat wire minimizes distortion and power compression while providing excellent heat dissipation and linearity ensuring precise control. The proprietary injection molded gasket and long-throw parabolic surround ensure longevity and allow extreme excursion and SPLs.
Sledge STA1200D Amplifier: Rated conservatively at 1200 watts RMS, and 4000 watts peak power, the PB-4000's 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. The amplifier's advanced digital processor maintains pinpoint accuracy and pristine sound quality through advanced in-room tuning, optimized frequency response curves, powerful DSP controls and more.
Rigid MDF Enclosure: The SVS PB-4000 powered subwoofer features a rigid MDF (Medium Density Fiberboard) cabinet with screw-in rubber feet and a non-resonant steel mesh grille to resist unwanted distortion caused by vibration. A double thick 2" MDF front baffle and rigid internal bracing is used to support the massive drive unit and to ensure an acoustically inert environment. This 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.
3 Front-Firing Ports: The cabinet utilizes a bass reflex (ported) design with three front-firing 3.5" high-flow ports with inner/outer port flares for smooth bass and high output. Foam port plugs are available at no charge directly from SVS, 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.
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