SVS Sound PB-17 Ultra - Active Subwoofer

Key Features

• 17" Fiberglass Composite Cone Woofer
• 3 x 4" Flared Front-Firing Ports
• Class-D Mono-Block STA-2800 Amplifier
• Amp Features 8 x 60A/200V MOSFET Stages
• Dual 8" Voice Coils
• 55 lb 4-Piece Toroidal Ferrite Motor
• 295 MHz Analog Devices DSP
• Switch Mode Power Supply
• Auto Room Correction
• Manage via SVS Mobile Control App

Designed to achieve the pinnacle of low-end performance in your home cinema, the piano gloss black-colored PB17-Ultra R|Evolution 17" Subwoofer from SVS features SVS' largest driver to date, with a 17" fiberglass composite cone woofer, joined by dual 8" voice coils and a 55 lb four-piece toroidal ferrite magnet motor assembly. Each voice coil is driven by a Class-D dual mono-block STA-2800 amplifier with MOSFET output stages. Enclosed in a double-thick MDF cabinet with three 4" flared ports, the PB17-Ultra is setup for extremely high airflow for bombastic cinematic soundtracks, and loud, distortion-free music playback. Integration is made easy with auto EQ room calibration and convenient management via mobile app.

17" Driver and Dual Voice Coils

Powered by a 55 lb four-piece toroidal ferrite electromagnetic motor, the 17" woofer is provided with a massive amount of force, yet tempered with precise control for detailed low-end frequencies. For additional accuracy and maximum efficiency, the 17" driver's fiberglass composite cone is lightweight and rigid, providing an optimal stiffness-to-mass ratio.

Dual Mono STA-2800 Amp and 8" Voice Coils

The audio output of the subwoofer is made to be effortless, thanks to dual 8" four-layer bi-filar voice coils, which conduct a massive amount of power from the amplifier to the motor, while achieving maximum thermal efficiency. This stable transfer of current also adds pinpoint drive control. The thermal capacity and magnetic field strength can be directly attributed to the copper clad aluminum construction of the voice coil. Each coil gets their power from a mono STA-2800 amplifier, which offers near limitless headroom with eight discrete 60A/200V MOSFET output stages.

Switch Mode Power Supply

Through Power-Factor-Correction (PFC) and an onboard AC line conditioner, the input power from a standard 15A household circuit is filtered and stabilized to remove interference and distortions, ultimately delivering a clean and consistent 160V rail voltage and optimal power delivery. To ensure effective operation, SVS equips this subwoofer with an FEA-optimized convection cooling system that has no exterior heatsinks.

295 MHz Analog Devices DSP

DSPs are not commonly found in subwoofers, yet SVS equips the PB17-Ultra with a sophisticated 295 MHz DSP from Analog Devices in order to optimize all aspects of the subwoofer's performance. The DSP monitors every function of the amplifier to stabilize AC voltage delivery, offering multi-point thermal, voltage, and current monitoring systems, and DAC processing with a 120 dB signal-to-noise ratio.

SVS Subwoofer Control App

Even for such a sophisticated subwoofer solution, the PB17-Ultra can be conveniently calibrated and managed via the SVS Subwoofer control app for Apple iOS, Google Android, and Amazon Fire devices. With it you can:

• Control volume, low-pass filter, phase, polarity, six parametric equalizers, room gain compensation, tuning modes, power management settings, and more
• Make adjustments to match your listening preferences with three memory presets and multiple audio modes, such as music, movies, night, and more
• Use it with the rear OLED panel and control interface for fast and direct control of important features, including a convenient Display Flip function

Enable customized frequence response curves with Standard, Extended, and Sealed variable port tuning modes using the included port plugs

Auto Room Correction

An additional feature of the SVS mobile app is automatic room correction. Using your smartphone's microphone, this feature will automatically tune the subwoofer's output to the acoustics of your space. It applies equalization filters, capitalizes on available room gain, and optimizes in-room frequency response at your main listening positions. The process takes just a few simple steps, with the overall gain of a customized in-room response.

Additional Driver Features

• 48.9mm Xmax, 81.78mm Xmech precision aligned excursion
• High temperature fiberglass composite former/bobbing
• Dual shorting rings reduce gap inductance and lower distortion
• Dual 25-strand copper-alloy and Nomex composite high-temperature leads woven through the spider provide a pristine electrical connection from the amplifiers to the voice coils.
• Precision machined and narrow tolerance Top-plate and oversized T-yoke with integrated pole-piece extension made from low carbon 1010 steel for optimal magnetics and thermal capacity
• Dual Nomex extreme excursion linear suspension spiders
• Proprietary injection-molded extreme-excursion catenary SBR rubber surround ensures optimal pistonic motion for pinpoint control and accuracy without distortion at the high drive levels
• High-density 17" powder-coated cast aluminum basket that's FEA-optimized for maximum rigidity, tensile strength, and energy transference
• Nickel-plated high-tension spring terminals provide secure connections

Additional Amplifier Features

• Two-stage 100-240 VAC full range active Power Factor Correction (PFC) which pre-regulates mains power to solid 390 VDC, regardless of mains voltage or quality, ensuring a consistent 160V rail voltage for the dual-mono amplifiers
• Onboard AC line conditioner filters and stabilizes incoming voltage, corrects waveform distortions, and eliminates electromagnetic and radio interferences to optimize signal quality and audio performance
• Convective cooling plate design pulls cool outside air through vents at the bottom of the amplifier plate, flowing over the amplifier components and internal heat sinks, eliminating the need for an external heatsinks
• Custom EQ and DSP limiter settings specifically for the 17-Ultra allows the subwoofer to take control of a room and pressurize it with accurate, acoustically tuned bass
• Unbalanced RCA 10k ohm input impedance (compatible with consumer and professional audio up to 4 Vrms inputs)
• Balanced XLR 14k ohm input impedance (compatible with consumer and professional audio up to 14 Vrms / +24 dBu inputs)
• USB port provides power for the optional SVS SoundPath Wireless Audio Adapter, which is made to eliminate the need for a cable run to the subwoofer from the source component
• Auto on and trigger options through app for additional convenience during installation (3.5mm trigger Input 3-12V AC/DC)
• 3.5mm IR input for easy integration with control systems
• Green 0.5W low standby power consumption
• RoHS compliant, lead-free construction

Additional Mobile App Features

• Unique bidirectional feedback shows adjustments in real time on both app and subwoofer interface
• Easy-to-follow tutorial provides clear guidance for all functions