Dual 9", composite layered, linear roll, extreme excursion spiders
Integrated tinsel leads
Nickel-plated high-tension spring terminals
Proprietary injection molded gasket and parabolic SBR extreme-excursion surround
Composite pulp/fiberglass press layered cone with stitched surround
Low carbon 1008 steel components, electrophoresis black plating
FEA-optimized overhung motor structure with custom gap extension plate enhances force/displacement symmetry, lower distortion and increases linear stroke
Copper shorting sleeve reduces gap induction and distortion, and enhances thermal conductivity
Dual Genox 8H/Y-35 high grade ferrite magnets
Oversized pole vent for greater cooling and low noise
Amp Specs:
STA-1000D Sledge with 1000 watts RMS continuous power (3600 watts peak dynamic power)
High efficiency cool-running Class D switching topology
Detachable power cord with main power switch and ceramic fuse
RoHS compliant, lead-free construction and world-wide safety certifications
Auto-On / On switch with "green" standby mode
Stereo line-level RCA and balanced (XLR) I/O connections
Normal and Hi input voltage switch
Customized EQ and DSP limiter settings specifically for the SB13-Ultra
Fully adjustable (frequency and slope) phase-correct speaker/sub digital crossover
Intelligent Feature Control (IFC) with bright LCD display
Two (2) digital PEQs with adjustable frequency, cut/boost, and Q values
Room gain compensation control with adjustable frequency and slope
Adjustable digital delay on main speaker line-level outputs to time-align the speakers and subs
Review
It is not just the aesthetics. It is not just the power. It is not just the precision and it is not just the level of detail that can be heard in the VLF range. It is all of these things combined that make the SB13 Ultra my Sub Zone Reviewer's Choice. There is simply no better performing subwoofer in its class."
Review, Home Theater Shack, 10/27/2012 by Dale Rasco. View Review.
"The performance sealed category just got some ferocious competition. I highly recommend it."
Video Review, Real HT Info, 9/5/2012 by Marshall Guthrie. View Review.