VM Audio ECD5400.1 Encore 5400W 1 Ohm Class D Amp Digital Mono Power Amplifier VM Audio ECD5400.1 DIGITAL MONOBLOCK AMPLIFIER FEATURES Mono Power Subwoofer Car Amplifier - Hyper-Digital Class D Exclusive Robust High-Cycle DC-to-DC PWM Power Conversion Four-Stage Regulated Synergistic High Voltage Rail Performance Sophisticated Noise Free Single Star Ground System