Cadence FXA5000.5 5-Channel 5000W Max Class A/B FXA Series Amplifier FXA5000.5 - Cadence 5-Channel 5000W Max Class A/B FXA Series Amplifier 4-Ohm RMS Power: 65W x 4 + 150 | 2-Ohm RMS Power: 90W x 4 + 300 | 4-Ohm Bridged Power: 180W x 2 | Peak Power: 5000 Watts High Efficiency, High Speed MOSFET Power Supply Extreme Convection Heat Dissipation via Computer Generated Heatsink Design Dimensions (L x W x H): 15.6" x 9.1" x 2.1"