SVS SB17-Ultra R|Evolution 17" Sealed Subwoofer

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Black Oak

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A large sealed subwoofer from SVS with a 17-inch driver, dual 8-inch voice coils and a 2,800-watt RMS amplifier. SVS rates its response at 15Hz to 320Hz (±3dB) and it is controlled from a smartphone app with Auto EQ room correction.

SVS calls it the SB17-Ultra R|Evolution and says it is built from three decades of its subwoofer design experience. It comes in Black Oak veneer or Piano Gloss Black.

Driver

17" front-firing

Amplifier

2,800W RMS, 6,000W+ peak

Frequency response

15 – 320Hz ±3dB

Cabinet

Sealed

Size (H × W × D)

50.7 × 49.5 × 53.7 cm

Weight

56.25 kg

SVS introduces the 17-Ultra R|Evolution

Why you will love it

17-inch driver, dual 8-inch voice coils

The driver has a glass fibre composite cone, a catenary SBR rubber surround and a four-piece ferrite motor weighing about 24.6 kg. SVS lists 48.9 mm Xmax and 81.78 mm Xmech.

SVS says the dual 8-inch voice coils are a first, and that each of the two amplifier channels drives one coil.

SVS SB17-Ultra R|Evolution subwoofer in Black Oak veneer, front view with the 17-inch driver

Dual mono STA-2800D amplifier

The Sledge STA-2800D uses two Class D mono-block amplifiers with eight 60 amp, 200 volt MOSFETs, rated at 2,800 watts RMS continuous and 6,000+ watts peak.

The switch mode power supply has active power factor correction and an AC line conditioner. SVS says the cooling design needs no external heatsinks.

295 MHz DSP and SVS Auto EQ

SVS says the 295 MHz Analog Devices DSP is the most sophisticated it has used in a consumer subwoofer. It runs 56-bit filtering and DACs with a 120 dB signal-to-noise ratio.

The SVS Subwoofer Control app works on iOS, Android and Amazon Fire. It adjusts volume, low pass filter, phase, polarity, six parametric EQ bands, room gain and three presets. Auto EQ measures your room using your phone's microphone or an optional external microphone.

Exploded view of the SVS SB17-Ultra R|Evolution showing the driver, motor and amplifier plate

Rear of the SVS SB17-Ultra R|Evolution showing the amplifier panel with XLR and RCA connections

Sealed cabinet

The sealed MDF cabinet has internal bracing, a fabric-covered ABS grille frame and screw-in iso-elastomer feet. The amplifier panel has an OLED display with a display-flip function for reading it from behind.

Is it right for you?

A great fit if you…

Have a large room or want very deep, controlled bass
Want app control and room correction built in
Run a high-end home theatre or stereo system
May add a second subwoofer later

Worth knowing

It is big and heavy: 56.25 kg unboxed and 53.7 cm deep with the grille
Room correction is by smartphone app, so you will need a compatible phone
SVS says dual subwoofers give a smoother response at more listening positions

Build your system

SVS says dual subwoofers give a smoother frequency response at more listening positions and greater headroom.

Home theatre: Connect to an AV receiver's subwoofer output with RCA or XLR
Stereo: Add to a stereo amplifier and floorstanding speakers
Wireless link: The USB port powers the SVS SoundPath Wireless Audio Adapter, sold separately
More SVS: See the SVS range and other subwoofers

Specifications

Driver and amplifier

Driver	17" front-firing, glass fibre composite cone, 8" dual voice coils
Motor	Four-piece Y35 ferrite, 24.57 kg
Excursion	48.9 mm Xmax, 81.78 mm Xmech
Amplifier	Sledge STA-2800D, dual mono Class D, 2,800W RMS (6,000W+ peak)
Frequency response	15Hz to 320Hz ±3dB
DSP	295 MHz Analog Devices, 56-bit filtering
Enclosure	Sealed, MDF with internal bracing

Connections and controls

Inputs	Stereo RCA (10 kilohms) and XLR (14 kilohms)
Outputs	Stereo RCA and XLR
Other	3.5 mm trigger input (3-12V AC/DC), 3.5 mm IR input, USB for SVS SoundPath Wireless Audio Adapter
Control	SVS Subwoofer Control app (iOS, Android, Amazon Fire) with Auto EQ, rear panel OLED
Power	100–240V, 0.5W standby

Design

Finish	Black Oak veneer or Piano Gloss Black
Dimensions with grille (H × W × D)	50.7 × 49.5 × 53.7 cm
Dimensions without grille (H × W × D)	50.7 × 49.5 × 51.6 cm
Weight (unboxed)	56.25 kg

Specifications from SVS, checked November 2026.

What is in the box

SVS SB17-Ultra R|Evolution subwoofer
Protective ABS grille frame with fabric mesh cover
Iso-elastomer feet
Heavy-duty 6 ft power cord
Quick start guide

Questions people ask

How low does it go?

SVS rates the frequency response at 15Hz to 320Hz (±3dB), measured quasi-anechoic. SVS notes the graph does not show maximum output.

How do I set it up?

Use the SVS Subwoofer Control app. Auto EQ uses your phone's microphone, or an optional external microphone, to measure the room and calculate filters.

Can I connect it to a stereo amplifier?

Yes, via RCA or XLR line inputs. It has stereo RCA and XLR outputs too.

Can it be linked wirelessly?

The USB port provides power for the SVS SoundPath Wireless Audio Adapter, which is sold separately.

Should I buy two?

SVS says dual subwoofers give a smoother frequency response at more listening positions and more headroom.