SVS SB17-Ultra R|Evolution
The SB17-Ultra R|Evolution combines seismic deep bass with the poise of a music-first sealed design. HomeTheaterHifi measured exceptional low-frequency output, while HiFi News praised its controlled scale and integration. A 17-inch driver, 2,800W amplification and app-based DSP deliver reference-level dynamics, rich texture and finely tunable room performance for cinema and two-channel systems alike.
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Deliciously Crispy
Bass
97/100
Integration
94/100
Dynamics
96/100
Build Quality
93/100
Features Usability
95/100
Value for Money
96/100
Pros
Delivers exceptionally deep, linear and powerful bass, with measured output reaching 110dB from 13.2Hz to 50Hz in-room.
Combines chest-thumping impact with tight transients, detail and musical timing rather than boom or overhang.
Comprehensive control app makes crossover, phase, EQ, room-gain compensation and presets straightforward to adjust.
Exceptional value for a reference-class sealed subwoofer, with performance compared favorably to substantially pricier alternatives.
Cons
Its 124lb cabinet and substantial footprint demand careful placement and are impractical for smaller rooms.
Careful level matching is essential: excessive gain can make bass dominate the mix and swamp other musical elements.
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What Reviewers Are Saying
Assessments of Build Quality, Usability, and Overall Propositions.
Bass
97/100
Reviewers repeatedly praise bass that is extraordinarily deep, powerful, and controlled rather than simply loud. HomeTheaterHifi measured 110dB from 13.2Hz to 50Hz with output still present at 10Hz, while listening reports describe distinct, potent pulses with no ringing, rich texture, and stomach-churning infra-bass authority.
Integration
94/100
The SB17-Ultra R|Evolution is widely reported to blend naturally when properly set up. Positive Feedback found that it did not call attention to itself as a separate source, instead locking into the main speakers, while HiFi News heard it bolster floorstanders without sounding incongruous and become nearly imperceptible on subtle material. HiFi News also notes that excessive level can make its bass bloom and swamp the mix, so careful adjustment remains important.
Dynamics
96/100
This subwoofer combines exceptional impact with composure under demanding playback. Reviewers report chest-thumping explosions, reference-level SPL without audible distortion, room-shaking output, and effortless punch even at levels above 90dB in-room. It is also praised for being able to tread lightly and handle delicate low-frequency duties rather than imposing a constant sense of brute force.
Build Quality
93/100
Construction is consistently described as substantial and purpose-built. Positive Feedback calls the braced cabinet tank-like, while HomeTheaterHifi highlights the effective Iso-elastomer feet and compact enclosure relative to its output capability. The thick MDF cabinet, reinforced baffle, serious driver assembly, and attention to resonance control all support an appropriately premium impression.
Features Usability
95/100
The SVS control app earns especially strong praise for making deep adjustment accessible, with volume, phase, polarity, low-pass filtering, room-gain compensation, parametric EQ, presets, and room-integration tools available from a phone. Reviewers also highlight the intuitive interface, useful saved presets for music and movies, OLED controls, balanced XLR connections, and optional wireless capability.
Value for Money
96/100
At roughly $2,500-$2,700, reviewers consider the SB17-Ultra R|Evolution an unusually compelling high-end option. HomeTheaterHifi calls its price the icing on the cake and compares its performance favorably with far more expensive Velodyne alternatives, while Andrew Robinson says it reaches reference-caliber territory for far less than a celebrated rival. HiFi News likewise characterizes it as a big, affordable box with both brains and brawn.
Reviews & Sources
Professional reviews and sources for this product's Watt'n Potatoes analysis.
Online Reviews & Mentions
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Specifications
- Frequency Response / Acoustic Data
- • 15Hz to 320Hz +/-3dB • Roll-off slope specifically optimized to take maximum advantage of available room gain. • 2-meter ground plane away from reflective structures (quasi-anechoic).
- Subwoofer Specs
- • Piano Gloss Black and Black Oak Real Wood Veneer finishes • Front Firing 17-inch high-excursion SVS driver • Protective non-resonant extra-thick ABS grille frame with fabric mesh cover to shield driver • Robust Medium Density Fiberboard (MDF) cabinet construction with internal bracing for resonance free performance at highest drive levels • Screw-in Iso-elastomer feet reduce noise artifacts and improve stability • Amplifier Rear Panel OLED and control interface provide fast and direct control of the most important features. Includes “Display Flip” function for viewing upside down from behind • Dimensions (with grille): 20.0” (507mm) H x 19.5” (495mm) W x 21.2” (537mm) D • Dimensions (without grille): 20.0” (507mm) H x 19.5” (495mm) W x 20.3” (516mm) D • Shipped Dimensions: 24.8” (630mm) H X 24.9” (633mm) W X 29.8” (757mm) D • Weight (unboxed): 124.0lbs (56.25kg) • Shipped Weight: 136.0lbs (61.7kg)
- Driver Specs
- • Proprietary SVS 17-inch long-throw driver with high-precision tuned overhung motor configuration • 63.76lb (28.92kg) pound Woofer with 54.17lb (24.57kg) pounds motor • 48.9mm Xmax, 81.78mm Xmech precision aligned excursion • 8” diameter Voice Coil with high current 4-layer bifilar copper-clad aluminum wire windings • Dual Voice coil design captures power delivery from dual-mono amplifier outputs into a single voice coil for maximum acoustic output • High Temperature glass-fiber composite former/bobbing • Four-piece high-grade oversized Y35 Ferrite magnet motor produces effortless on-demand driving-force for subtle and over-the-top low frequency sonics • 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 low carbon 1010 steel top-plate and oversized T-yoke with integrated pole-piece extension for optimal magnetics and thermal capacity • Dual Nomex extreme excursion linear suspension spiders • Custom injection-molded extreme-excursion catenary SBR rubber surround ensures flawless pistonic motion for pinpoint control and accuracy without distortion at reference drive levels • Premium glass-fiber laminated dustcap and vented composite cone sub-structure with exceptional stiffness-to-mass ratio ensures a light, ridged, and neutral radiating surface about to move massive amounts of air with crisp precision • High-density 17” Powder-coated cast aluminum basket FEA optimized for maximum rigidity, tensile strength, and energy transference • Nickel-plated high-tension spring terminals provide secure connections
- Amplifier Specs
- • Sledge STA-2800D with 2800 watts RMS continuous power (6000+ watts peak dynamic power) • Dual-mono discrete Class D amplifiers generate endless power from eight massive 60A 200V MOSFETs, resulting in lower EMI and highest efficiency • High resolution 295Mhz Analog Devices Audio DSP with double precision 56bit filtering. Over 5x the processing power of previous subwoofers, the most advanced subwoofer processor available for flawless low frequency audio reproduction • Monitors every function of the amplifier ensuring precisely regulated clean voltage is delivered to and from the switch mode power supply and maximum current is pushed to the driver’s voice coils • DSP Continuously runs complex power management algorithms and multi-point thermal, voltage, and current monitoring systems to optimize AC voltage delivery to the power supply for continuous peak performance with maximum performance and greatest efficiency • Advanced digital audio processing and DACs (Digital-to-Analog Converters) with 120 dB Signal-to-Noise Ratio provide greater headroom, lower noise, and flawless fidelity • All new Switch Mode Power Supply (SMPS) includes a two-stage 100v-240v full range active Power Factor Correction (PFC) to pre-regulate mains to solid 390V DC regardless of mains voltage or quality. Ensures a consistent 160V rail voltage for dual-mono amplifiers over a wide-range of AC voltages • Onboard AC line conditioner filters and stabilizes incoming voltage, corrects waveform distortions, and eliminates electromagnetic and radio interferences to optimize signal quality • Pioneering 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 • User auto EQ and DSP limiter settings specifically for the 17-Ultra allow the subwoofer to take control of a room and pressurize it with accurate, heart-pounding, acoustically tuned bass • XLR and RCA stereo input/output with ultra-wide input voltage bandwidth compliant with consumer and professional audio applications up to 4V line level input • Unbalanced RCA 10kohm input impedance (compatible with consumer and professional audio up to 4Vrms inputs) • Balanced XLR 14kohm input impedance (compatible with consumer and professional audio up to 14Vrms / +24dBu inputs) OLED and control interface with easy control of the most important features • USB provides power for the SVS SoundPath Wireless Audio Adapter (sold separately) which eliminates the need for a cable run to the subwoofer from the source component. • Auto/On and Trigger options through App for maximum installation convenience (3.5mm trigger Input 3-12V AC/DC) • 3.5mm IR input for easy integration with control systems • Green 0.5-watt low standby power consumption • RoHS compliant, lead-free construction, world-wide safety certifications.
- SVS App Features
- • Compatible with Apple iOS, Google Android, and Amazon Fire platforms, the industry leading SVS Subwoofer Control Smartphone app allows convenient and intuitive management of all subwoofer controls. • The Analog Devices DSP supports a comprehensive menu of functions, including volume, fully adjustable low pass filter, phase, polarity, six PEQs, room gain compensation, tuning modes, power management settings, and more. • Includes three convenient memory presets for fast and easy global system adjustments to match listener preferences. • Subwoofer Auto Room Equalization (available via over-the-air app update soon) • Uses your mobile device’s built-in microphone to measure the acoustic performance of your subwoofer in your room • Automatically calculates equalization filters to optimize the subwoofer and room combined performance at your listening position • Subwoofer Auto Room Equalization (available via over-the-air app update soon) • Easy-to-follow tutorial provides clear guidance for all functions
- Included Accessories
- • Protective non-resonant extra-thick ABS grille frame with fabric mesh cover • Iso-elastomer feet • Extra heavy-duty, high current 6’ power cord • Quick Start Guide
Manufacturer's Description — SVS
A quantum leap forward in design and performance with multiple groundbreaking innovations - the most formidable and sophisticated sealed subwoofer ever developed.
All-new 17-inch driver with first-ever dual 8-inch voice coils. The most powerful amplifier ever deployed in a consumer subwoofer with unprecedented dual mono-block design married to the extreme intelligence of a 295MHz DSP. All managed by the most sophisticated subwoofer control app, now with SVS Auto EQ room correction.
Effortless Output from High-Excursion 17-inch SVS Driver
It was a ground-up process designing the largest, most formidable driver ever deployed in an SVS subwoofer. An all-new dual voice coil, suspension, basket, and extreme-excursion surround achieve chest-compressing sound pressure levels with flawless tonal accuracy.
- Lightweight and rigid 17-inch glass fiber composite cone with optimal stiffness-to-mass ratio for maximum efficiency and acoustic linearity
- 55lb four-piece toroidal ferrite electromagnetic motor generates massive force with precise control, remaining authoritative yet detailed and controlled
- Extreme-excursion catenary SBR rubber surround maintains pure, long-throw pistonic driver motion
Unerring Control from Revolutionary Dual 8-inch Voice Coils
Unprecedented dual 8-inch voice coils ensure stable transfer of electro-magnetic current to the 17-inch driver for authoritative output and pinpoint driver control.
- 4-layer bi-filar dual voice coils conduct the massive power from the dual-mono amplifier to the motor with maximum thermal efficiency, resulting in effortless acoustic output
- Copper clad aluminum voice coil wire combines the best properties of both elements, yielding ideal thermal capacity and magnetic field strength
First Ever Dual Mono STA-2800D Amplifier Design with Discrete MOSFET Output
The sonic muscle behind the most powerful and highest fidelity SVS subwoofer amplifier ever developed. SB17-Ultra R|Evolution STA-2800D features technological innovations never offered before in a consumer subwoofer amplifier with breakthroughs to ensure refined behavior and pristine response at any volume.
- Limitless headroom from dual mono-block Class-D amplifiers with MOSFET output stages
- Each amp drives one of the dual 8-inch voice coils within the motor to assert pinpoint control and maximize power fed to the driver
- Eight 60 Amp 200 Volt MOSFETs deliver extreme high current for reference-level output with maximum efficiency
Performance Enhancing Switch Mode Power Supply
Regardless of the power coming out of your household circuit, the SB17-Ultra R|Evolution always maintains peak performance and remains impervious to voltage fluctuations.
- 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
- Ensures clean and consistent 160V rail voltage and optimal power delivery from a standard 15-amp home circuit
- Power-Factor-Correction (PFC) time aligns the AC voltage to the AC current resulting in less heat, greater efficiency, reliable peak power output, and the ability to maintain rated power over a wide-range of voltages
- FEA optimized convection cooling system has no exterior heatsinks, an extraordinary feat for such a powerful amplifier
Extreme Subwoofer Intelligence – 295 MHz Analog Devices DSP
Orchestrating the cutting-edge amplifier, motor, and driver ecosystem is the most sophisticated DSP ever deployed in a consumer subwoofer.
- Accurately shapes in-room frequency response with absolute precision for faithful signal reproduction
- Monitors every function of the amplifier to stabilize AC voltage delivery to the power supply to maintain consistent peak output
- Multi-point thermal, voltage, and current monitoring systems ensures maximum output and efficiency
- Advanced digital audio processing and DACs (Digital-to-Analog Converters) with 120 dB Signal-to-Noise Ratio provide greater headroom, lower noise, and pristine fidelity
SVS Subwoofer Smartphone Control App Now with Auto EQ Room Correction
Compatible with Apple iOS, Google Android, and Amazon Fire platforms, the SVS Subwoofer Control Smartphone app allows convenient subwoofer tuning and management.
- Controls for volume, low pass filter, phase, polarity, six parametric equalizers, room gain compensation, tuning modes, power management settings, and more
- Includes three convenient memory presets for fast and easy system adjustments to match your listening preferences – music, movies, night mode, and more
- Amplifier Rear Panel OLED and control interface provide fast and direct control of the most important features and includes a convenient “Display Flip” function
Subwoofer Output Tuned to Your Room - SVS Auto EQ
Rooms have a major impact on subwoofer performance. SVS Auto EQ analyzes your listening environment and optimizes subwoofer output for your specific space using the SVS Subwoofer Control App and a smartphone microphone or optional external microphone
Key Benefits
- Simple over-the-air update and guided setup in minutes
- Optimized performance across multiple listening positions
- Smoother, more balanced and musical bass
- Improved frequency response and tonal accuracy
- Acoustically optimized room gain for deeper extension and greater impact
- Reduces localization, peaks, and nulls caused by room acoustics
Interested in learning more? A list of FAQs about the new SVS Auto EQ feature is available here
Verified Dealers
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Authorized dealers for SVS SB17-Ultra R|Evolution
- Abt Electronics — online and in-store — Glenview, Illinois, United States (website)
- Alex Audio Video — in-store — Sofia, Sofia City Province, Bulgaria (website)
- Altitudo Audio — online and in-store — Winnipeg, Manitoba, Canada (website)
- Apollo HiFi — online and in-store — Marrickville, New South Wales, Australia (website)
- Art & Voice — online (website)
- Audio Advice — online and in-store — Raleigh, North Carolina, United States (website)
- Audio Breakthroughs — in-store — Manhasset, New York, United States (website)
- Audio Classics — in-store — New York, United States (website)
- Audio Lab — online and in-store — Honolulu, Hawaii, United States (website)
- Audio Magic - EU — online and in-store — Wola, Województwo mazowieckie, Poland (website)
and 93 more verified dealers