An SVS-exclusive design, our Ultra 13 driver was uncompromisingly crafted using the highest quality components, custom-tooled parts, and innovative technologies. As a result it, delivers an unparalleled combination of extreme output, ultra-low distortion, and exceptional linearity. The Sledge STA-1000D amplifier is a perfect match for the Ultra-13 driver, packing 1,000 watts of power and sophisticated DSP control. Comprehensive and extensive menu options are accessed via an intuitive single-knob interface and easy-to-use, LCD display. This will make your set-up and integration with home theater or stereo system quick and simple. 1000 watts RMS continuous power (3600 watts peak dynamic power). Efficient Performance and Versatile Tuning Size makes a big difference if you're out to create the unforgettable experience that only purpose-built theaters deliver. Massive amounts of air need to be moved and stopped with precision. The large cabinet and deep-tuned ports of an SVS ported subwoofer are designed and engineered to do exactly that. They effortlessly reproduce of the deepest bass notes with stunning authority. The PB13-Ultra offers our trademark variable tuning to accommodate different size rooms and deep extension requirements-either as a single subwoofer or part of a dual (or larger) configuration. Wide-flared triple 3.5" ports for maximum air-flow with no artifacts. 20 Hz, 16 Hz and Sealed variable tuning accommodates all room sizes and deep extension requirements. Curved metal grille with secure pin/cup retention system gives high-tech appearance. Premium Finishes, Handsome Styling, the Defining Theater Product Available in real wood veneer black oak or piano-gloss black, and protected by a curved metal grille (removable) - the PB13-Ultra will complement the most upscale décors and high-end theaters. At 22.5x20.5x28 and 155lbs its size makes a statement all its own about the experience it's about to deliver.