• FEA-optimized motor with dual shorting rings and pole extenders to reduce gap induction and distortion.
• 2" diameter, high-power voice coil with high-temp GSV former.
  
• Nomex linear-roll super long-throw spider.
  
• Exclusive SVS aluminum cone and composite dust cap for excellent transient response and resonance control.
• Vented pole-piece for greater cooling, low noise, and reduced compression artifacts.

Sledge Amplification – Intelligent and Sophisticated Power
Our Sledge STA-400D amplifier sports technology and features simply not found anywhere else at this price point. Starting with a conservatively rated 400 watts of power – a perfect match for the rugged NSD-12 woofer. The world-class Analog Devices chipsets and SigmaStudio software suite allow our SVS Subhuman engineers to optimize the frequency response and output characteristics of the SB12-NSD in a manner other brands simply can't match. You won't find old-fashioned analog pots on this amp – every control knob is actually a digital actuator for precise and noise-free adjustment. And comprehensive and flexible connectivity options allow for easy set-up and integration into any home theater or stereo system.

• 400 watts of efficient, cool-running Class D power with 'green' standby mode.
• Stereo line-level RCA I/O connections.
  
• Separate high-passed and unfiltered line level outputs.
  
• Continuously variable low pass filter.
• Analog Devices DSP control for optimized performance and refined behavior.

• 14" cube and only 35 pounds - easy to move and locate anywhere.
• High quality charcoal black vinyl finish, or high-grade piano gloss black for a slight cost premium.
  
• Stylish curved metal grille.

• Dims: 14.6" (H) x 14.2" (W) x 14.2"(D)
• Weight: 35 pounds
• Rigid MDF cabinet
• High quality charcoal black vinyl, or polished piano gloss finish
• Front-firing woofer
• Protective non-resonant steel mesh grille

• SVS 12” NSD woofer
• 2” diameter, high-power voice coil with high-temp GSV former
• Nomex linear roll long-throw spider
• Low-creep rubber long-throw surround
• Spider-integrated tinsel leads
• Aluminum cone and composite dust cap with SVS logo
• Powder-coated cast aluminum basket
• FEA-optimized motor structure
• Dual shorting rings and pole extenders to reduce gap induction and distortion
• Dual high-grade ferrite magnets

• STA-400D Sledge with 400 watts continuous into 4 ohms nominal
• High efficiency cool-running Class D switching topology
• Detachable power cord with main power switch and fuse
• RoHS compliant, lead-free construction and world-wide safety certifications
• Auto-On / On switch with "green" standby mode
• Stereo line-level RCA I/O connections
• Fully adjustable low pass filter with Disable setting   
• Unfiltered (for daisy-chain) and 80 Hz HPF line level RCA outputs
• Customized EQ and DSP limiter settings specifically for the SB12-NSD

Frequency Response/Acoustic Data:

• 2-meter ground plane away from reflective structures (quasi-anechoic)
• 23-270 Hz +/- 3 dB

Customer Reviews:

I added this sub to my current SVS setup and have been thrilled ever since. It has been quoted elsewhere as the sub, that "make's your neighbors
hate you, and your friends envious." This is all true. This sub is so impressive that it even won my wife over, who is the most frugal and
anti-audophile on the planet. Even she agrees that this sub simply belongs in our home theater. Go for it, you won't regret it.

I have the SB12 Plus, and it is the best subwoofer in the universe. I researched for weeks before making my decision on which product to buy, and I
feel I could not have chosen any better. The sound is so very clean and undistorted at any volume, the unit is so well constructed, and my rosewood
model is beautiful! I could not be happier, and recommend this subwoofer to everyone who will listen. Oh, and the price was incredibly low compared
to other products -- much higher quality for a lower price.

I have wanted to own an SVS sub for nearly a decade but just didn't have the chance to build my dream home theater. In 2010, I finally got that chance
and selected this sub based on great company reputation and being the fact this was the most affordable sub. After emailing SVS, they assured me that
my smaller room volume would be very well served by this sub. They were absolutely correct and using the Audissey automatic calibration feature on my
receiver, the set up was a breeze! My SB12-NSD sits nearly hidden in the corner yet any movie with a deep bass sound track is brought to life. I have
my receiver set to "night mode" all the time but still I have to be careful to keep the volume down when my daughter is sleeping.
/>My only advice for anyone considering ANY SV Sub - make sure your HT room is well insulated from bass sound so you can get maximum enjoyment at
near-reference volumes for movies. This is also a great musical sub with tight bass and relatively compact size to fit in your main living areas.

I really don't write reviews on products, But this one really deserved it. Look no further if you are looking for a tight clean sound, no distortion
and that can keep up with the bigger ones. This is the one for you. My only regret is not getting a second one.

Incredible sub! I did a ton of research, both online at home theater forums and in person listening to some bigger name brands like Polk Audio,
Energy, JBL and even got to listen to an Elemental Design Audio sub. After considering the quality associated with SVS, the fact that fellow
audiophiles hold SVS in the highest regard and that it was started by S and V after they met on Home Theater Forum, I decided to go with the SB12-NSD
before ever listening to it.
First, it's heavy, solid, well constructed, and looks great! I could not ask for SVS to have put more quality into
this sub, it's perfected sealed subwoofer construction.
Second, frequency response is as flat as the chart they post indicates. It sounds
phenomenal in any room because of this and requires much less positional adjustment to get a great full sound. (Most subwoofers require you to place
them in very specific positions in room corners so that the less accentuated frequencies get a little geometric boost in audibility, but the SB12-NSD
absolutely does not.)
Third, this subwoofer has more detail and articulation across the range of lower frequencies than I previously thought
possible. I'm a stickler for non-boomy subwoofers and this SVS sub made my musician ears jump up and down and cheer! Amazing musicality I've never
heard in any sub before.
All around perfect sealed sub for mid-large rooms. Outperforms subs priced >$1500 easily. Great value! This or the
larger SB13-PLUS are the very high standard bars for sealed subs.