Available for all SVS 13-Ultra Series subwoofers, the 13-Ultra Amplifier Upgrade Kit unlocks all the world-class technology, advanced DSP controls and innovative features available in the acclaimed 4000 Series Sledge 1200D amplifier platform, including:

• SVS Subwoofer DSP and control smartphone app
• 1,200 watts RMS, 4,000 watts Peak power amplifier with fully discrete MOSFET output
• 50Mhz High Resolution Analog Devices Audio DSP
• Active Power Factor Correction (PFC) and ground loop isolation