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Description
SVS SB17-Ultra R|Evolution Sealed Box SubwooferExperience the pinnacle of low frequency performance with the SB17 Ultra R Evolution, the new gold standard in subwoofer design. Key Features Driver: 17" Freq. Response: 15Hz to 320Hz + 3dB Dimension: 50. 8 cm (H) 49. 5 cm (W) 53. 9 cm (D) This subwoofer redefines power and precision with a groundbreaking 17 inch driver, dual 8 inch voice coils, and a revolutionary STA 2800 dual mono block amplifier. Engineered with the most advanced DSP ever found in
Experience the pinnacle of low-frequency performance with the SB17-Ultra R|Evolution, the new gold standard in subwoofer design.
Key Features
- Driver: 17"
- Freq. Response: 15Hz to 320Hz +/-3dB
- Dimension: 50.8 cm (H) 49.5 cm (W) 53.9 cm (D)
This subwoofer redefines power and precision with a groundbreaking 17-inch driver, dual 8-inch voice coils, and a revolutionary STA-2800 dual mono-block amplifier. Engineered with the most advanced DSP ever found in a consumer subwoofer, it adapts seamlessly to your room, delivering crushing impact and nuanced musicality with effortless control.
Feel the deep, chest-rumbling bass and enjoy extraordinary accuracy across all frequencies. Whether you're immersed in cinematic soundtracks or enjoying the subtlety of a musical performance, the SB17-Ultra R|Evolution ensures that every note is rendered with clarity and precision. Boasting extension down to a staggering 15 Hz, this subwoofer delivers the kind of visceral impact that you can both hear and feel.
- Revolutionary 17-Inch Driver: Featuring a glass-fibre composite cone with a massive 25kg magnet assembly, the SB17-Ultra delivers thunderous bass with absolute precision.
- Dual 8-Inch Voice Coils: Ensures peak efficiency and accurate energy transfer for impeccable driver control, giving you low frequencies with unrivalled stability.
- Dual Mono-Block Amplifiers: These Class-D amplifiers deliver double the power, providing effortless output while conserving energy for an optimised home experience.
- Advanced DSP and Power Supply: A 295 MHz processor ensures flawless performance, while the switch mode power supply optimises signal quality by stabilising voltage.
- Control at Your Fingertips: The SVS app gives you complete control over DSP settings, including EQ, filters, phase adjustments, and auto-room calibration—making it easier than ever to fine-tune your sound.
- Sealed Cabinet Precision: With its acoustically tuned, resonance-free design, the cabinet ensures pure, uncoloured bass for audiophile-grade performance.
Step into a new realm of bass excellence with the SB17-Ultra R|Evolution, where power meets finesse, and sound comes to life like never before.
Frequency Response / Acoustic Data:
* Frequency response graph does not denote maximum output capability
- 15Hz to 320Hz +/-3dB
- Roll-off slope specifically optimised 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 Fibreboard (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 aluminium 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-fibre 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-fibre 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 aluminium basket FEA optimised for maximum rigidity, tensile strength, and energy transference
- Nickel-plated high-tension spring terminals provide secure connections
Amplifier Specs:
- Massively powerful SVS STA-2800D Class D amplifier design
- 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 optimise 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 stabilises incoming voltage, corrects waveform distortions, and eliminates electromagnetic and radio interferences to optimise 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 pressurise 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
- 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 Equalisation (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 equalisation filters to optimise the subwoofer and room combined performance at your listening position
- Subwoofer Auto Room Equalisation (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
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 140 reviews
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Product Reviews
★★★★★ 5
Stable, flexible in deployment configuration, creates true privacy and looks great.
Size: 3 Panel 12FT W
This is the second room divider panel I have installed, and there are several features about this one that I like much better than my older one.
The fact that there are no gaps and that the material is thicker means you get more privacy or more hiding power, if you wish. My older divider has vertical spaces between each of the panels and the panels are half as wide as the Siebwin panels, so there are many vertical spaces. The Siebwin divider really creates privacy.
Another feature that I really appreciate is that the legs are wider and stand off from the floor. On my older one the legs are flat and they're rather awkward to adjust because they create more drag on the floor. The feet on the older one also loosen if you turn them counter clockwise, so adjustments of configuration that require the feet to be moved are more complex.
The older divider also must be deployed in a zig-zag fashion because he feet are not as wide, but this new one can be deployed and stable in a straight, an "N" shape or an arc. They are both the same length, but because the older one must be use in a zig-zag deployment it doesn't reach to the length of the new one.
The Siebwin divider definitely costs more at $103.48, but it sports several features and advantages over the other brand, so it does a better job and is worth the extra cost.
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Reviewed in the United States on May 25, 2026
★★★★★ 4
Easy to assemble, does the job, material is shiny nylon and shows creases, minor defects, sloppy
Size: 3 Panel 12FT W, Size: 3 Panel 12FT W
The Siebwin room divider is a good idea, and for the price, it mostly delivers on the intended functionality. I ordered the 12 foot, 3-panel version mainly to hide an unfinished basement storage area that had become an eyesore. It works well for that purpose and gives the space a cleaner appearance without spending the kind of money that more decorative dividers or custom partitions cost. If you need something temporary, portable, or mainly functional, this is a viable option.
There are a few limitations that became obvious during setup and use. The first thing I noticed was that the weld quality on some of the metal poles is fairly sloppy. Once the cover is installed, you do not really see it, but up close, it does not look especially refined or professional. The blackout material also is not a matte canvas style fabric as I expected. It has more of a shiny nylon appearance, and the creases are fairly visible. Being that it’s more of a nylon, I’d be hesitant to try steaming it to remove the creases. However, the creases do not matter if you are using it in a basement, dorm, or shared room, but for photography, video work, or a professional office setting, the appearance could be disappointing. The fabric is thick enough, though. It blocks visibility well enough, but strong light behind it still shows through to some extent, nothing deal-breaking. Also, my fabric appeared to be slightly defective. The hook and loop strip on one of the bottom sections was off-center and couldn't be totally attached because it was lined up with one of the legs. I originally hoped to use this as a video backdrop, but I will probably end up replacing the fabric with a proper green screen or canvas material while continuing to use the frame itself. For now, it does a good job of covering my basement junk.
Assembly was actually easier than I expected and took roughly 15 to 20 minutes. The longer vertical poles are tethered together similarly to tent poles, which made setup straightforward and fairly intuitive. The shorter horizontal pieces slide and snap together to the top and bottom of the vertical assembly. After each section is assembled, the divider panels connect together with metal plates and two knurled screws (at the top and bottom), so no tools are really required. A few screws were difficult to start because paint had gotten into the threads, but once they caught, they tightened down normally. The feet install with similar knurled fasteners and help keep the divider reasonably stable. One thing to watch for during setup is the fabric orientation. There is one arrow indicator in the middle of the fabric to indicate up. However, if you need another indicator, the smaller hook and loop strip goes on the bottom while the longer strip goes on top. I realized mine was upside down right before finishing and had to redo it. I wasn't difficult to redo, despite the defect in mine.
The overall design is practical and easy to move around. I do like that the panels can fold and bend into different shapes depending on the space. The widened feet help stability, although when trying to stretch the fabric tight, I noticed the poles sometimes wanted to overlap slightly at the joints. Tightening everything helped somewhat, but it still happened occasionally. The divider feels adequate for normal indoor use, though I would not expect premium durability or luxury-level fit and finish at this price point. The entire device can also be easily disabled and stored in a tote if you need it completely out of the way. It comes with assembly instructions, but even if you didn’t have them, it’s easy to build without them (save a mistake or two).
In terms of value, I think the Siebwin divider mostly matches its price. Around $100 gets you a large freestanding partition with decent usability and easy assembly, but there are compromises in materials, appearance, and refinement. The defects are also off-putting, but hopefully you won't have them. Higher-end room dividers can easily cost two or three times more, so some of the tradeoffs are expected. I also noticed cheaper alternatives online, but based on the quality here, I suspect those would probably have even more issues. For practical home use, temporary privacy, hiding storage areas, or separating shared spaces, this is a good option as long as expectations stay realistic.
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Reviewed in the United States on May 18, 2026
★★★★★ 3
Works well but takes up more space than expected
Size: 2 Panel 8FT W, Size: 2 Panel 8FT W
This room divider does the job for creating a little extra privacy and was easy enough to set up. The panels feel decent quality and the wider feet help keep it more stable than some cheaper screens I’ve tried. My only issue is that it takes up a bit more room than I expected, especially with the feet sticking out. It’s still portable and folds away nicely, but definitely measure your space first. Overall it works well for separating a room or blocking off an area temporarily. i wish it came in other colors
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Nice divider, serves it's purpose well!
Size: 3 Panel 12FT W
This room divider worked out very well for what I needed. I wanted a simple way to create a little more privacy and separation in a larger room without doing anything permanent, and this divider was an easy solution. The panels provide good coverage, and the black color gives it a clean, modern appearance that blends in nicely with different décor styles.
Assembly was fairly straightforward, and once set up, the wider feet helped keep the divider stable on the floor. I was especially happy with how flexible the panels are to arrange. You can keep it mostly straight, angle it around furniture, or create a more enclosed private space depending on the layout you need.
The material allows light to filter through slightly while still offering a noticeable sense of privacy. I’ve used it for separating a workspace area, but it would also work well in bedrooms, apartments, dorms, studios, or shared living spaces. Another plus is that it can be folded and moved without too much effort when you want to change the setup.
Overall, this divider delivers a good balance of functionality, portability, and appearance. It’s a practical option for anyone needing temporary room separation without installing permanent walls or curtains.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Perfect for Adding Privacy to a Piano Studio
Size: 2 Panel 8FT W, Size: 2 Panel 8FT W
I Ordered the 2 Panel version which is way too big for my needs... that's on me. So keep in mind that the picture shows a fabric made for two panels only being used on one and hence it is not pulled tight; it would pull tight and not be so wrinkly if it was set up properly as two panels. The metal pools that make up the panels seem to be well made, stable, and of good quality. They were very easy to put together and they stand up tall with plenty of height. The appearance of it with the fabric on it isn't as elegant as it could be, but it still looks good enough. The material is plenty solid, not allowing light through it, and thereby making a solid barrier. I am using it to block the view out the studio door when a student is sitting at the piano to avoid distractions from the hallway. It will allow a student to enter the studio with our distracting the student who is at the piano.
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Reviewed in the United States on May 18, 2026