Soundstream PA4.700 Picasso Series 700W Class AB 4-Channel Amplifier Picasso Series 700W Class AB 4-Channel Amplifier RMS Power Range: 45Wx4@4-ohms / 85Wx2@2-ohms / Bridged: 175Wx2@4-ohms Maximum Power: 700 Watts MOSFET Power Supply w/ Audiophile Grade IRTM Transistors Hybrid Aluminum Alloy Heatsink for Optimum Dissipation